label and update list rework (#229)

* Reformatting the updates available list

* rewritten list padding to be dynamic

* Label rework + clearer messages (#228)

- Moved up label check and logic to earlier in the process, to iterate the whole run the same way if `-l` option is passed.
- Added messaging to make it clearer.
- Clarified Readme and --help message.
- Clarified prune message (to mean ALL dangling, not just currently updated).

.gitignore

@@ -7,3 +7,5 @@
 regctl
 # ignore snooze file
 snooze.list
+# ignore updates file
+updates_available.txt

README.md

@@ -20,26 +20,37 @@
 <h5 align="center">For Podman - see the fork <a href="https://github.com/sudo-kraken/podcheck">sudo-kraken/podcheck</a>!</h4>
 
 ___
-## :bell: Changelog
+## Changelog
 
-- **v0.6.9**: #
-    - Bugfix: label logic didn't skip recreation (skipped pulling).
-    - Added comma separated search filtering so you can selectively search exactly which containers to check/update.
-      - eg: `dockcheck.sh -yp homer,dozzle`
-- **v0.6.8**:
-    - Bugfix: Unbound variable in notify_v2.sh
-    - New option: "DisplaySourcedFiles" *config* added to list what files get sourced
-- **v0.6.7**: Snooze feature, curl, and consolidation
-    - Added snooze feature to delay notifications
-    - Added configurable default curl arguments
-    - Consolidated and standardized notify template update notifications
-    - Added curl error handling
+
+- **v0.7.2**:
+    - Label rework:
+      - Moved up label logic to work globally on the current run.
+      - Only iterating on labeled containers when used with `-l` option, not listing others.
+      - Clarified messaging and readme/help texts.
+    - List reformatting for "available updates" numbering to easier highlight and copy:
+      - Padded with zero, changed `)` to `-`, example: `02 - homer`
+      - Can be selected by writing `2,3,4` or `02,03,04`.
+- **v0.7.1**:
+    - Added support for multiple notifications using the same template
+    - Added support for notification output format
+    - Added support for file output
+    - Added optional configuration variables per channel to (replace `<channel>` with any channel name):
+      - `<channel>_TEMPLATE` : Specify a template
+      - `<channel>_SKIPSNOOZE` : Skip snooze
+      - `<channel>_CONTAINERSONLY` : Only notify for docker container related updates
+      - `<channel>_ALLOWEMPTY` : Always send notifications, even when empty
+      - `<channel>_OUTPUT` : Define output format
+- **v0.7.0**:
+    - Bugfix: snooze dockcheck.sh-self-notification and some config clarification.
+    - Added authentication support to Ntfy.sh.
+    - Added suport for sendmail in the SMTP-template.
 ___
 
 
 ![](extras/example.gif)
 
-## :mag_right: `dockcheck.sh`
+## `dockcheck.sh`
 ```
 $ ./dockcheck.sh -h
 Syntax:     dockcheck.sh [OPTION] [comma separated names to include]
@@ -55,7 +66,7 @@ Options:
 -h     Print this Help.
 -i     Inform - send a preconfigured notification.
 -I     Prints custom releasenote urls alongside each container with updates in CLI output (requires urls.list).
--l     Only update if label is set. See readme.
+-l     Only include containers with label set. See readme.
 -m     Monochrome mode, no printf colour codes and hides progress bar.
 -M     Prints custom releasenote urls as markdown (requires template support).
 -n     No updates, only checking availability.
@@ -89,7 +100,7 @@ After the updates are complete, you'll get prompted if you'd like to prune dangl
 
 ___
 
-## :nut_and_bolt: Dependencies
+## Dependencies
 - Running docker (duh) and compose, either standalone or plugin. (see [Podman fork](https://github.com/sudo-kraken/podcheck)  
 - Bash shell or compatible shell of at least v4.3
   - POSIX `xargs`, usually default but can be installed with the `findutils` package - to enable async.
@@ -99,7 +110,7 @@ ___
   - User will be prompted to download `regctl` if not in `PATH` or `PWD`.  
   - regctl requires `amd64/arm64` - see [workaround](#roller_coaster-workaround-for-non-amd64--arm64) if other architecture is used.
 
-## :tent: Install Instructions
+## Install Instructions
 Download the script to a directory in **PATH**, I'd suggest using `~/.local/bin` as that's usually in **PATH**.  
 For OSX/macOS preferably use `/usr/local/bin`.
 ```sh
@@ -116,19 +127,21 @@ wget -O ~/.local/bin/dockcheck.sh "https://raw.githubusercontent.com/mag37/dockc
 Then call the script anywhere with just `dockcheck.sh`.
 Add preferred `notify.sh`-template to the same directory - this will not be touched by the scripts self-update function.
 
-## :handbag: Configuration
+## Configuration
 To modify settings and have them persist through updates - copy the `default.config` to `dockcheck.config` alongside the script or in `~/.config/`.  
 Alternatively create an alias where specific flags and values are set.  
 Example `alias dc=dockcheck.sh -p -x 10 -t 3`.
 
-## :loudspeaker: Notifications
-Trigger with the `-i` flag.
-If `notify.sh` is present and configured, it will be used. Otherwise, `notify_v2.sh` will be enabled.
-Will send a list of containers with updates available and a notification when `dockcheck.sh` itself has an update.
-Run it scheduled with `-ni` to only get notified when there's updates available!
+## Notifications
+Triggered with the `-i` flag. Will send a list of containers with updates available and a notification when `dockcheck.sh` itself has an update.
+`notify_templates/notify_v2.sh` is the default notification wrapper, if `notify.sh` is present and configured, it will override.
+
+Example of a cron scheduled job running non-interactive at 10'oclock excluding 1 container and sending notifications:
+`0 10 * * * /home/user123/.local/bin/dockcheck.sh -nix 10 -e excluded_container1`
 
 #### Installation and configuration:
-Make certain your project directory is laid out as below. You only need the notify_v2.sh file and any notification templates you wish to enable, but there is no harm in having all of them present.
+Set up a directory structure as below.
+You only need the `notify_templates/notify_v2.sh` file and any notification templates you wish to enable, but there is no harm in having all of them present.
 ```
  .
 ├── notify_templates/
@@ -150,27 +163,26 @@ Make certain your project directory is laid out as below. You only need the noti
 ├── dockcheck.sh
 └── urls.list         # optional
 ```
-Uncomment and set the NOTIFY_CHANNELS environment variable in `dockcheck.config` to a space separated string of your desired notification channels to enable.
-Uncomment and set the environment variables related to the enabled notification channels.  
-It is recommended to only edit the environmental variables in `dockcheck.config` and not make changes directly to the `notify_X.sh` template files within the `notify_templates` subdirectory.
-If you wish to customize the notify templates yourself, you may copy them to your project root directory alongside the main `dockcheck.sh` script (where they will also be ignored by git).
-Customizing `notify_v2.sh` is handled the same as customizing the templates, but it must be renamed to `notify.sh` within the `dockcheck.sh` root directory.
+- Uncomment and set the `NOTIFY_CHANNELS=""` environment variable in `dockcheck.config` to a space separated string of your desired notification channels to enable.
+- Uncomment and set the environment variables related to the enabled notification channels. Eg. `GOTIFY_DOMAIN=""` + `GOTIFY_TOKEN=""`.
 
+It's recommended to only do configuration with variables within `dockcheck.config` and not modify `notify_templates/notify_X.sh` directly. If you wish to customize the notify templates yourself, you may copy them to your project root directory alongside the main `dockcheck.sh` (where they're also ignored by git).  
+Customizing `notify_v2.sh` is handled the same as customizing the templates, but it must be renamed to `notify.sh` within the `dockcheck.sh` root directory.  
 
-#### Legacy installation and configuration:
-Use a previous version of a `notify_X.sh` template file (tag v0.6.4 or earlier) from the **notify_templates** directory,
-copy it to `notify.sh` alongside the script, modify it to your needs! (notify.sh is added to .gitignore)
 
 #### Snooze feature:
-**Use case:** You wish to be notified of available updates in a timely manner, but do not require reminders after the initial notification with the same frequency.
-e.g. *Dockcheck is scheduled to run every hour. You will receive an update notification within an hour of availability.*  
-**Snooze enabled:** you will not receive another notification about updates for this container for a configurable period of time.  
-**Snooze disabled:** you will receive additional notifications every hour.
+Configure to receive scheduled notifications only if they're new since the last notification - within a set time frame.
+
+**Example:** *Dockcheck is scheduled to run every hour. You will receive an update notification within an hour of availability.*  
+**Snooze enabled:** You will not receive a repeated notification about an already notified update within the snooze duration.  
+**Snooze disabled:** You will receive additional (possibly repeated) notifications every hour.  
+
+To enable snooze uncomment the `SNOOZE_SECONDS` variable in your `dockcheck.config` and set it to the number of seconds you wish to prevent duplicate alerts.  
+Snooze is split into three categories; container updates, `dockcheck.sh` self updates and notification template updates.
 
-To enable snooze, uncomment the `SNOOZE_SECONDS` variable in your `dockcheck.config` file and set it to the number of seconds you wish to prevent duplicate alerts.
-The true snooze duration will be 60 seconds less than your configure value to account for minor scheduling or script run time issues.
 If an update becomes available for an item that is not snoozed, notifications will be sent and include all available updates for that item's category, even snoozed items.
-`dockcheck.sh` updates, notification template updates, and container updates are considered three separate categories.
+
+The actual snooze duration will be 60 seconds less than `SNOOZE_SECONDS` to account for minor scheduling or run time issues.
 
 
 #### Current notify templates:
@@ -189,10 +201,26 @@ If an update becomes available for an item that is not snoozed, notifications wi
 - [Discord](https://support.discord.com/hc/en-us/articles/228383668-Intro-to-Webhooks) - Discord webhooks.
 - [Slack](https://api.slack.com/tutorials/tracks/posting-messages-with-curl) - Slack curl api
 
-Further additions are welcome - suggestions or PRs!  
-<sub><sup>Initiated and first contributed by [yoyoma2](https://github.com/yoyoma2).</sup></sub>  
+Further additions are welcome - suggestions or PRs!
+<sub><sup>Initiated and first contributed by [yoyoma2](https://github.com/yoyoma2).</sup></sub>
 
-### :date: Release notes addon
+#### Notification channel configuration:
+All required environment variables for each notification channel are provided in the default.config file as comments and must be uncommented and modified for your requirements.  
+For advanced users, additional functionality is available via custom configurations and environment variables.  
+Use cases - all configured in `dockcheck.config`:  
+(replace `<channel>` with the upper case name of the of the channel as listed in `NOTIFY_CHANNELS` variable, eg `TELEGRAM_SKIPSNOOZE`)
+- To bypass the snooze feature, even when enabled, add the variable `<channel>_SKIPSNOOZE` and set it to `true`.
+- To configure the channel to only send container update notifications, add the variable `<channel>_CONTAINERSONLY` and set it to `true`.
+- To send notifications even when there are no updates available, add the variable `<channel>_ALLOWEMPTY`  and set it to `true`.
+- To use another notification output format, add the variable `<channel>_OUTPUT` and set it to `csv`, `json`, or `text`. If unset or set to an invalid value, defaults to `text`.
+- To send multiple notifications using the same notification template:
+  - Strings in the `NOTIFY_CHANNELS` list are now treated as unique names and do not necessarily refer to the notification template that will be called, though they do by default.
+  - Add another notification channel to `NOTIFY_CHANNELS` in `dockcheck.config`. The name can contain upper and lower case letters, numbers and underscores, but can't start with a number.
+  - Add the variable `<channel>_TEMPLATE` to `dockcheck.config` where `<channel>` is the name of the channel added above and set the value to an available notification template script (`slack`, `apprise`, `gotify`, etc.)
+  - Add all other environment variables required for the chosen template to function with `<channel>` in upper case as the prefix rather than the template name.
+    - For example, if `<channel>` is `mynotification` and the template configured is `slack`, you would need to set `MYNOTIFICATION_CHANNEL_ID` and `MYNOTIFICATION_ACCESS_TOKEN`.
+
+### Release notes addon
 There's a function to use a lookup-file to add release note URL's to the notification message.  
 Copy the notify_templates/`urls.list` file to the script directory, it will be used automatically if it's there.  
 Modify it as necessary, the names of interest in the left column needs to match your container names.  
@@ -209,19 +237,19 @@ nginx  ->  https://github.com/docker-library/official-images/blob/master/library
 ```
 The `urls.list` file is just an example and I'd gladly see that people contribute back when they add their preferred URLs to their lists.
 
-## :fast_forward: Asyncronous update checks with **xargs**; `-x N` option. (default=1)
+## Asyncronous update checks with **xargs**; `-x N` option. (default=1)
 Pass `-x N` where N is number of subprocesses allowed, experiment in your environment to find a suitable max!  
 Change the default value by editing the `MaxAsync=N` variable in `dockcheck.sh`. To disable the subprocess function set `MaxAsync=0`.
 
 
-## :chart_with_upwards_trend: Extra plugins and tools:
+## Extra plugins and tools:
 
-### :small_orange_diamond: Using dockcheck.sh with the Synology DSM
+### Using dockcheck.sh with the Synology DSM
 If you run your container through the *Container Manager GUI* - only notifications are supported.  
 While if running manual (vanilla docker compose CLI) will allow you to use the update function too.  
 Some extra setup to tie together with Synology DSM - check out the [addons/DSM/README.md](./addons/DSM/README.md).
 
-### :small_orange_diamond: Prometheus and node_exporter
+### Prometheus and node_exporter
 Dockcheck can be used together with [Prometheus](https://github.com/prometheus/prometheus) and [node_exporter](https://github.com/prometheus/node_exporter) to export metrics via the file collector, scheduled with cron or likely.
 This is done with the `-c` option, like this:
 ```
@@ -231,20 +259,20 @@ dockcheck.sh -c /path/to/exporter/directory
 See the [README.md](./addons/prometheus/README.md) for more detailed information on how to set it up!  
 <sub><sup>Contributed by [tdralle](https://github.com/tdralle).</sup></sub>  
 
-### :small_orange_diamond: Zabbix config to monitor docker image updates
+### Zabbix config to monitor docker image updates
 If you already use Zabbix - this config will show numbers of available docker image updates on host.  
 Example: *2 Docker Image updates on host-xyz*  
 See project: [thetorminal/zabbix-docker-image-updates](https://github.com/thetorminal/zabbix-docker-image-updates)
 
-### :small_orange_diamond: Serve REST API to list all available updates
+### Serve REST API to list all available updates
 A custom python script to serve a REST API to get pulled into other monitoring tools like [homepage](https://github.com/gethomepage/homepage).  
 See [discussion here](https://github.com/mag37/dockcheck/discussions/146).
 
-### :small_orange_diamond: Wrapper Script for Unraid's User Scripts
+### Wrapper Script for Unraid's User Scripts
 A custom bash wrapper script to allow the usage of dockcheck as a Unraid User Script plugin.  
 See [discussion here](https://github.com/mag37/dockcheck/discussions/145).
 
-## :bookmark: Labels
+## Labels
 Optionally add labels to compose-files. Currently these are the usable labels:
 ```
     labels:
@@ -252,11 +280,13 @@ Optionally add labels to compose-files. Currently these are the usable labels:
       mag37.dockcheck.only-specific-container: true
       mag37.dockcheck.restart-stack: true
 ```
-- `mag37.dockcheck.update: true` will when used with the `-l` option only update containers with this label and skip the rest. Will still list updates as usual.
+- `mag37.dockcheck.update: true` will when used with the `-l` option only check and update containers with this label set and skip the rest.  
 - `mag37.dockcheck.only-specific-container: true` works instead of the `-F` option, specifying the updated container when doing compose up, like `docker compose up -d homer`.
 - `mag37.dockcheck.restart-stack: true` works instead of the `-f` option, forcing stop+restart on the whole compose-stack (Caution: Will restart on every updated container within stack).
 
-## :roller_coaster: Workaround for non **amd64** / **arm64**
+Adding or modifying labels in compose-files requires a restart of the container to take effect.
+
+## Workaround for non **amd64** / **arm64**
 `regctl` provides binaries for amd64/arm64, to use on other architecture you could try this workaround.
 Run regctl in a container wrapped in a shell script. Copied from [regclient/docs/install.md](https://github.com/regclient/regclient/blob/main/docs/install.md):
 
@@ -276,7 +306,7 @@ chmod 755 regctl
 ```
 Test it with `./regctl --help` and then either add the file to the same path as *dockcheck.sh* or in your path (eg. `~/.local/bin/regctl`).
 
-## :whale: Docker Hub pull limit :chart_with_downwards_trend: not an issue for checks but for actual pulls
+## Docker Hub pull limit :chart_with_downwards_trend: not an issue for checks but for actual pulls
 Due to recent changes in [Docker Hub usage and limits](https://docs.docker.com/docker-hub/usage/)
 >Unauthenticated users: 10 pulls/hour  
 >Authenticated users with a free account: 100 pulls/hour
@@ -284,7 +314,7 @@ Due to recent changes in [Docker Hub usage and limits](https://docs.docker.com/d
 This is not an issue for registry checks. But if you have a large stack and pull more than 10 updates at once consider updating more often or to create a free account.
 You could use/modify the login-wrapper function in the example below to automate the login prior to running `dockcheck.sh`.
 
-### :guardsman: Function to auth with docker hub before running
+### Function to auth with docker hub before running
 **Example** - Change names, paths, and remove cat+password flag if you rather get prompted:
 ```sh
 function dchk {
@@ -293,31 +323,32 @@ function dchk {
 }
 ```
 
-## :warning: `-r flag` disclaimer and warning
+## `-r flag` disclaimer and warning
 **Wont auto-update the containers, only their images. (compose is recommended)**  
 `docker run` dont support using new images just by restarting a container.  
 Containers need to be manually stopped, removed and created again to run on the new image.  
 Using the `-r` option together with eg. `-i` and `-n` to just check for updates and send notifications and not update is safe though!
 
-## :hammer: Known issues
+## Known issues
 - No detailed error feedback (just skip + list what's skipped).
 - Not respecting `--profile` options when re-creating the container.
 - Not working well with containers created by **Portainer**.
 - **Watchtower** might cause issues due to retagging images when checking for updates (and thereby pulling new images).
 
-## :wrench: Debugging
+## Debugging
 If you hit issues, you could check the output of the `extras/errorCheck.sh` script for clues.
 Another option is to run the main script with debugging in a subshell `bash -x dockcheck.sh` - if there's a particular container/image that's causing issues you can filter for just that through `bash -x dockcheck.sh nginx`.
 
-## :scroll: License
+## License
 dockcheck is created and released under the [GNU GPL v3.0](https://www.gnu.org/licenses/gpl-3.0-standalone.html) license.
 
-## :heartpulse: Sponsorlist
+## Sponsorlist
 
 - [avegy](https://github.com/avegy)
 - [eichhorn](https://github.com/eichhorn)
 - [stepdg](https://github.com/stepdg)
-
+- [acer2220](https://github.com/acer2220)
+- [shgew](https://github.com/shgew)
 ___
 
-### :floppy_disk: The [story](https://mag37.org/posts/project_dockcheck/) behind it. 1 year in retrospect.
+### The [story](https://mag37.org/posts/project_dockcheck/) behind it. 1 year in retrospect.

default.config

@@ -32,14 +32,14 @@
 ## All commented values are examples only. Modify as needed.
 ##
 ## Uncomment the line below and specify the notification channels you wish to enable in a space separated string
-# NOTIFY_CHANNELS="apprise discord DSM generic HA gotify matrix ntfy pushbullet pushover slack smtp telegram"
+# NOTIFY_CHANNELS="apprise discord DSM file generic HA gotify matrix ntfy pushbullet pushover slack smtp telegram file"
 #
 ## Uncomment the line below and specify the number of seconds to delay notifications to enable snooze
 # SNOOZE_SECONDS=86400
 #
-## Uncomment to not send notifications when dockcheck itself has updates.
+## Uncomment and set to true to disable notifications when dockcheck itself has updates.
 # DISABLE_DOCKCHECK_NOTIFICATION=false
-## Uncomment to not send notifications when notify scripts themselves have updates.
+## Uncomment and set to true to disable notifications when notify scripts themselves have updates.
 # DISABLE_NOTIFY_NOTIFICATION=false
 #
 ## Apprise configuration variables. Set APPRISE_PAYLOAD to make a CLI call or set APPRISE_URL to make an API request instead.
@@ -68,6 +68,7 @@
 ## https://ntfy.sh or your custom domain with https:// and no trailing /
 # NTFY_DOMAIN="https://ntfy.sh"
 # NTFY_TOPIC_NAME="YourUniqueTopicName"
+# NTFY_AUTH=""   # set to either format -> "user:password" OR ":tk_12345678". If using tokens, don't forget the ":"
 #
 # PUSHBULLET_URL="https://api.pushbullet.com/v2/pushes"
 # PUSHBULLET_TOKEN="token-value"
@@ -86,4 +87,6 @@
 # TELEGRAM_CHAT_ID="mychatid"
 # TELEGRAM_TOKEN="token-value"
 # TELEGRAM_TOPIC_ID="0"
+#
+# FILE_PATH="${ScriptWorkDir}/updates_available.txt"
 

dockcheck.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-VERSION="v0.6.9"
-# ChangeNotes: bugfix label logic and added comma separated search filtering
+VERSION="v0.7.2"
+# ChangeNotes: Reformatted updates list, rewrote label logic to work globally when used with `-l`.
 Github="https://github.com/mag37/dockcheck"
 RawUrl="https://raw.githubusercontent.com/mag37/dockcheck/main/dockcheck.sh"
 
@@ -42,7 +42,7 @@ Help() {
   echo "-h     Print this Help."
   echo "-i     Inform - send a preconfigured notification."
   echo "-I     Prints custom releasenote urls alongside each container with updates in CLI output (requires urls.list)."
-  echo "-l     Only update if label is set. See readme."
+  echo "-l     Only include containers with label set. See readme."
   echo "-m     Monochrome mode, no printf colour codes and hides progress bar."
   echo "-M     Prints custom releasenote urls as markdown (requires template support)."
   echo "-n     No updates; only checking availability without interaction."
@@ -342,12 +342,13 @@ dependency_check() {
 dependency_check "regctl" "regbin" "https://github.com/regclient/regclient/releases/latest/download/regctl-linux-TEMP"
 dependency_check "jq" "jqbin" "https://github.com/jqlang/jq/releases/latest/download/jq-linux-TEMP"
 
-# Numbered List function
-# if urls.list exists add release note url per line
+# Numbered List function - pads with zero
 list_options() {
-  num=1
+  local total="${#Updates[@]}"
+  [[ ${#total} < 2 ]] && local pads=2 || local pads="${#total}"
+  local num=1
   for update in "${Updates[@]}"; do
-    echo "$num) $update"
+    printf "%0*d - %s\n" $pads $num $update
     ((num++))
   done
 }
@@ -423,6 +424,10 @@ check_image() {
     printf "%s\n" "NoUpdates !$i - not checked, no compose file"
     return
   fi
+  # Checking if Label Only -option is set, and if container got the label
+  ContUpdateLabel=$($jqbin -r '."mag37.dockcheck.update"' <<< "$ContLabels")
+  [[ "$ContUpdateLabel" == "null" ]] && ContUpdateLabel=""
+  [[ "$OnlyLabel" == true ]] && { [[ "$ContUpdateLabel" != true ]] && { echo "Skip $i"; return; } }
 
   local NoUpdates GotUpdates GotErrors
   ImageId=$(docker inspect "$i" --format='{{.Image}}')
@@ -448,7 +453,7 @@ check_image() {
 # Make required functions and variables available to subprocesses
 export -f check_image datecheck
 export Excludes_string="${Excludes[*]:-}" # Can only export scalar variables
-export t_out regbin RepoUrl DaysOld DRunUp jqbin
+export t_out regbin RepoUrl DaysOld DRunUp jqbin OnlyLabel
 
 # Check for POSIX xargs with -P option, fallback without async
 if (echo "test" | xargs -P 2 >/dev/null 2>&1) && [[ "$MaxAsync" != 0 ]]; then
@@ -478,6 +483,8 @@ done < <( \
   xargs $XargsAsync -I {} bash -c 'check_image "{}"' \
 )
 
+[[ "$OnlyLabel" == true ]] && printf "\n%bLabel option active:%b Only checking containers with labels set.\n" "$c_blue" "$c_reset"
+
 # Sort arrays alphabetically
 IFS=$'\n'
 NoUpdates=($(sort <<<"${NoUpdates[*]:-}"))
@@ -507,6 +514,8 @@ if [[ -n ${GotUpdates[*]:-} ]]; then
   if [[ -s "$ScriptWorkDir/urls.list" ]] && [[ "$PrintReleaseURL" == true ]]; then releasenotes; else Updates=("${GotUpdates[@]}"); fi
   [[ "$AutoMode" == false ]] && list_options || printf "%s\n" "${Updates[@]}"
   [[ "$Notify" == true ]] && { exec_if_exists_or_fail send_notification "${GotUpdates[@]}" || printf "\nCould not source notification function.\n"; }
+else
+  [[ "$Notify" == true ]] && [[ ! -s "${ScriptWorkDir}/notify.sh" ]] && { exec_if_exists_or_fail send_notification "${GotUpdates[@]}" || printf "\nCould not source notification function.\n"; }
 fi
 
 # Optionally get updates if there's any
@@ -531,10 +540,6 @@ if [[ -n "${GotUpdates:-}" ]]; then
       ContImage=$(docker inspect "$i" --format='{{.Config.Image}}')
       ContPath=$($jqbin -r '."com.docker.compose.project.working_dir"' <<< "$ContLabels")
       [[ "$ContPath" == "null" ]] && ContPath=""
-      ContUpdateLabel=$($jqbin -r '."mag37.dockcheck.update"' <<< "$ContLabels")
-      [[ "$ContUpdateLabel" == "null" ]] && ContUpdateLabel=""
-      # Checking if Label Only -option is set, and if container got the label
-      [[ "$OnlyLabel" == true ]] && { [[ "$ContUpdateLabel" != true ]] && { echo "No update label, skipping."; continue; } }
 
       # Checking if compose-values are empty - hence started with docker run
       if [[ -z "$ContPath" ]]; then
@@ -566,8 +571,6 @@ if [[ -n "${GotUpdates:-}" ]]; then
       [[ "$ContName" == "null" ]] && ContName=""
       ContEnv=$($jqbin -r '."com.docker.compose.project.environment_file"' <<< "$ContLabels")
       [[ "$ContEnv" == "null" ]] && ContEnv=""
-      ContUpdateLabel=$($jqbin -r '."mag37.dockcheck.update"' <<< "$ContLabels")
-      [[ "$ContUpdateLabel" == "null" ]] && ContUpdateLabel=""
       ContRestartStack=$($jqbin -r '."mag37.dockcheck.restart-stack"' <<< "$ContLabels")
       [[ "$ContRestartStack" == "null" ]] && ContRestartStack=""
       ContOnlySpecific=$($jqbin -r '."mag37.dockcheck.only-specific-container"' <<< "$ContLabels")
@@ -576,8 +579,6 @@ if [[ -n "${GotUpdates:-}" ]]; then
       printf "\n%bNow recreating (%s/%s): %b%s%b\n" "$c_teal" "$CurrentQue" "$NumberofUpdates" "$c_blue" "$i" "$c_reset"
       # Checking if compose-values are empty - hence started with docker run
       [[ -z "$ContPath" ]] && { echo "Not a compose container, skipping."; continue; }
-      # Checking if Label Only -option is set, and if container got the label
-      [[ "$OnlyLabel" == true ]] && { [[ "$ContUpdateLabel" != true ]] && { echo "No update label, skipping."; continue; } }
 
       # cd to the compose-file directory to account for people who use relative volumes
       cd "$ContPath" || { printf "\n%bPath error - skipping%b %s" "$c_red" "$c_reset" "$i"; continue; }
@@ -600,8 +601,8 @@ if [[ -n "${GotUpdates:-}" ]]; then
         ${DockerBin} ${CompleteConfs} ${ContEnvs} up -d ${SpecificContainer} || { printf "\n%bDocker error, exiting!%b\n" "$c_red" "$c_reset" ; exit 1; }
       fi
     done
-    if [[ "$AutoPrune" == false ]] && [[ "$AutoMode" == false ]]; then printf "\n"; read -rep "Would you like to prune dangling images? y/[n]: " AutoPrune; fi
-    if [[ "$AutoPrune" == true ]] || [[ "$AutoPrune" =~ [yY] ]]; then printf "\n Auto pruning.."; docker image prune -f; fi
+    if [[ "$AutoPrune" == false ]] && [[ "$AutoMode" == false ]]; then printf "\n"; read -rep "Would you like to prune all dangling images? y/[n]: " AutoPrune; fi
+    if [[ "$AutoPrune" == true ]] || [[ "$AutoPrune" =~ [yY] ]]; then printf "\nAuto pruning.."; docker image prune -f; fi
     printf "\n%bAll done!%b\n" "$c_green" "$c_reset"
   else
     printf "\nNo updates installed, exiting.\n"

notify_templates/notify_DSM.sh

@@ -1,5 +1,5 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_DSM_VERSION="v0.3"
+NOTIFY_DSM_VERSION="v0.5"
 # INFO: ssmtp is deprecated - consider to use msmtp instead.
 #
 # mSMTP/sSMTP has to be installed and configured manually.
@@ -10,25 +10,39 @@ NOTIFY_DSM_VERSION="v0.3"
 
 MSMTP=$(which msmtp)
 SSMTP=$(which ssmtp)
+SENDMAIL=$(which sendmail)
 
 if [ -n "$MSMTP" ] ; then
 	MailPkg=$MSMTP
 elif [ -n "$SSMTP" ] ; then
 	MailPkg=$SSMTP
+elif [ -n "$SENDMAIL" ] ; then
+	MailPkg=$SENDMAIL
 else
-	echo "No msmtp or ssmtp binary found in PATH: $PATH" ; exit 1
+	echo "No msmtp, ssmtp or sendmail binary found in PATH: $PATH" ; exit 1
 fi
 
 trigger_DSM_notification() {
+  if [[ -n "$1" ]]; then
+    DSM_channel="$1"
+  else
+    DSM_channel="DSM"
+  fi
+
+UpperChannel="${DSM_channel^^}"
+
+DSMSendmailToVar="${UpperChannel}_SENDMAILTO"
+DSMSubjectTagVar="${UpperChannel}_SUBJECTTAG"
+
 CfgFile="/usr/syno/etc/synosmtp.conf"
 
 # User variables:
 # Automatically sends to your usual destination for synology DSM notification emails.
 # You can also manually override by assigning something else to DSM_SENDMAILTO in dockcheck.config.
-SendMailTo=${DSM_SENDMAILTO:-$(grep 'eventmail1' $CfgFile | sed -n 's/.*"\([^"]*\)".*/\1/p')}
+SendMailTo=${!DSMSendmailToVar:-$(grep 'eventmail1' $CfgFile | sed -n 's/.*"\([^"]*\)".*/\1/p')}
 # e.g. DSM_SENDMAILTO="me@mydomain.com"
 
-SubjectTag=${DSM_SUBJECTTAG:-$(grep 'eventsubjectprefix' $CfgFile | sed -n 's/.*"\([^"]*\)".*/\1/p')}
+SubjectTag=${!DSMSubjectTagVar:-$(grep 'eventsubjectprefix' $CfgFile | sed -n 's/.*"\([^"]*\)".*/\1/p')}
 # e.g. DSM_SUBJECTTAG="Email Subject Prefix"
 SenderName=$(grep 'smtp_from_name' $CfgFile | sed -n 's/.*"\([^"]*\)".*/\1/p')
 SenderMail=$(grep 'smtp_from_mail' $CfgFile | sed -n 's/.*"\([^"]*\)".*/\1/p')

notify_templates/notify_HA.sh

@@ -1,5 +1,5 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_HA_VERSION="v0.1"
+NOTIFY_HA_VERSION="v0.2"
 #
 # This is an integration that makes it possible to send notifications via Home Assistant (https://www.home-assistant.io/integrations/notify/)
 # You need to generate a long-lived access token in Home Sssistant to be used here (https://developers.home-assistant.io/docs/auth_api/#long-lived-access-token)
@@ -7,15 +7,28 @@ NOTIFY_HA_VERSION="v0.1"
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set HA_ENTITY, HA_URL and HA_TOKEN in your dockcheck.config file.
 
-if [[ -z "${HA_ENTITY:-}" ]] || [[ -z "${HA_URL:-}" ]] || [[ -z "${HA_TOKEN:-}" ]]; then
-  printf "Home Assistant notification channel enabled, but required configuration variables are missing. Home assistant notifications will not be sent.\n"
-
-  remove_channel HA
-fi
-
 trigger_HA_notification() {
-  AccessToken="${HA_TOKEN}"
-  Url="${HA_URL}/api/services/notify/${HA_ENTITY}"
+  if [[ -n "$1" ]]; then
+    HA_channel="$1"
+  else
+    HA_channel="HA"
+  fi
+
+  UpperChannel="${HA_channel^^}"
+
+  HAEntityVar="${UpperChannel}_ENTITY"
+  HAUrlVar="${UpperChannel}_URL"
+  HATokenVar="${UpperChannel}_TOKEN"
+
+  if [[ -z "${!HAEntityVar:-}" ]] || [[ -z "${!HAUrlVar:-}" ]] || [[ -z "${!HATokenVar:-}" ]]; then
+    printf "The ${HA_channel} notification channel is enabled, but required configuration variables are missing. Home assistant notifications will not be sent.\n"
+
+    remove_channel HA
+    return 0
+  fi
+
+  AccessToken="${!HATokenVar}"
+  Url="${!HAUrlVar}/api/services/notify/${!HAEntityVar}"
   JsonData=$( "$jqbin" -n \
               --arg body "$MessageBody" \
               '{"title": "dockcheck update", "message": $body}' )

notify_templates/notify_apprise.sh

@@ -1,5 +1,5 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_APPRISE_VERSION="v0.3"
+NOTIFY_APPRISE_VERSION="v0.4"
 #
 # Required receiving services must already be set up.
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
@@ -7,17 +7,28 @@ NOTIFY_APPRISE_VERSION="v0.3"
 # Do not modify this file directly within the "notify_templates" subdirectory. Set APPRISE_PAYLOAD in your dockcheck.config file.
 # If API, set APPRISE_URL instead.
 
-if [[ -z "${APPRISE_PAYLOAD:-}" ]] && [[ -z "${APPRISE_URL:-}" ]]; then
-  printf "Apprise notification channel enabled, but required configuration variables are missing. Apprise notifications will not be sent.\n"
-
-  remove_channel apprise
-fi
-
 trigger_apprise_notification() {
+  if [[ -n "$1" ]]; then
+    apprise_channel="$1"
+  else
+    apprise_channel="apprise"
+  fi
 
-  if [[ -n "${APPRISE_PAYLOAD:-}" ]]; then
+  UpperChannel="${apprise_channel^^}"
+
+  ApprisePayloadVar="${UpperChannel}_PAYLOAD"
+  AppriseUrlVar="${UpperChannel}_URL"
+
+  if [[ -z "${!ApprisePayloadVar:-}" ]] && [[ -z "${!AppriseUrlVar:-}" ]]; then
+    printf "The ${apprise_channel} notification channel is enabled, but required configuration variables are missing. Apprise notifications will not be sent.\n"
+
+    remove_channel apprise
+    return 0
+  fi
+
+  if [[ -n "${!ApprisePayloadVar:-}" ]]; then
     apprise -vv -t "$MessageTitle" -b "$MessageBody" \
-      ${APPRISE_PAYLOAD}
+      ${!ApprisePayloadVar}
 
     if [[ $? -gt 0 ]]; then
       NotifyError=true
@@ -29,8 +40,8 @@ trigger_apprise_notification() {
   #                      pbul://o.gn5kj6nfhv736I7jC3cj3QLRiyhgl98b
   #                      tgram://{bot_token}/{chat_id}/'
 
-  if [[ -n "${APPRISE_URL:-}" ]]; then
-    AppriseURL="${APPRISE_URL}"
+  if [[ -n "${!AppriseUrlVar:-}" ]]; then
+    AppriseURL="${!AppriseUrlVar}"
     curl -S -o /dev/null ${CurlArgs} -X POST -F "title=$MessageTitle" -F "body=$MessageBody" -F "tags=all" $AppriseURL # e.g. APPRISE_URL=http://apprise.mydomain.tld:1234/notify/apprise
 
     if [[ $? -gt 0 ]]; then

notify_templates/notify_discord.sh

@@ -1,19 +1,30 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_DISCORD_VERSION="v0.4"
+NOTIFY_DISCORD_VERSION="v0.5"
 #
 # Required receiving services must already be set up.
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set DISCORD_WEBHOOK_URL in your dockcheck.config file.
 
-if [[ -z "${DISCORD_WEBHOOK_URL:-}" ]]; then
-  printf "Discord notification channel enabled, but required configuration variables are missing. Discord notifications will not be sent.\n"
-
-  remove_channel discord
-fi
-
 trigger_discord_notification() {
-  DiscordWebhookUrl="${DISCORD_WEBHOOK_URL}" # e.g. DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/<token string>
+  if [[ -n "$1" ]]; then
+    discord_channel="$1"
+  else
+    discord_channel="discord"
+  fi
+
+  UpperChannel="${discord_channel^^}"
+
+  DiscordWebhookUrlVar="${UpperChannel}_WEBHOOK_URL"
+
+  if [[ -z "${!DiscordWebhookUrlVar:-}" ]]; then
+    printf "The ${discord_channel} notification channel is enabled, but required configuration variables are missing. Discord notifications will not be sent.\n"
+
+    remove_channel discord
+    return 0
+  fi
+
+  DiscordWebhookUrl="${!DiscordWebhookUrlVar}" # e.g. DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/<token string>
 
   JsonData=$( "$jqbin" -n \
               --arg username "$FromHost" \

notify_templates/notify_file.sh

@@ -0,0 +1,22 @@
+### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
+NOTIFY_FILE_VERSION="v0.1"
+#
+# Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
+# If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
+
+trigger_file_notification() {
+  if [[ -n "$1" ]]; then
+    file_channel="$1"
+    UpperChannel=$(tr '[:lower:]' '[:upper:]' <<< "$file_channel")
+  else
+    file_channel="file"
+    UpperChannel="FILE"
+  fi
+
+  FilePathVar="${UpperChannel}_PATH"
+
+  NotifyFile="${!FilePathVar:=${ScriptWorkDir}/updates_available.txt}"
+
+  echo "${MessageBody}" > ${NotifyFile}
+
+}

notify_templates/notify_gotify.sh

@@ -1,20 +1,32 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_GOTIFY_VERSION="v0.4"
+NOTIFY_GOTIFY_VERSION="v0.5"
 #
 # Required receiving services must already be set up.
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set GOTIFY_TOKEN and GOTIFY_DOMAIN in your dockcheck.config file.
 
-if [[ -z "${GOTIFY_TOKEN:-}" ]] || [[ -z "${GOTIFY_DOMAIN:-}" ]]; then
-  printf "Gotify notification channel enabled, but required configuration variables are missing. Gotify notifications will not be sent.\n"
-
-  remove_channel gotify
-fi
-
 trigger_gotify_notification() {
-  GotifyToken="${GOTIFY_TOKEN}" # e.g. GOTIFY_TOKEN=token-value
-  GotifyUrl="${GOTIFY_DOMAIN}/message?token=${GotifyToken}" # e.g. GOTIFY_URL=https://gotify.domain.tld
+  if [[ -n "$1" ]]; then
+    gotify_channel="$1"
+  else
+    gotify_channel="gotify"
+  fi
+
+  UpperChannel="${gotify_channel^^}"
+
+  GotifyTokenVar="${UpperChannel}_TOKEN"
+  GotifyUrlVar="${UpperChannel}_DOMAIN"
+
+  if [[ -z "${!GotifyTokenVar:-}" ]] || [[ -z "${!GotifyUrlVar:-}" ]]; then
+    printf "The ${gotify_channel} notification channel is enabled, but required configuration variables are missing. Gotify notifications will not be sent.\n"
+
+    remove_channel gotify
+    return 0
+  fi
+
+  GotifyToken="${!GotifyTokenVar}" # e.g. GOTIFY_TOKEN=token-value
+  GotifyUrl="${!GotifyUrlVar}/message?token=${GotifyToken}" # e.g. GOTIFY_URL=https://gotify.domain.tld
 
   if [[ "$PrintMarkdownURL" == true ]]; then
       ContentType="text/markdown"

notify_templates/notify_matrix.sh

@@ -1,25 +1,38 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_MATRIX_VERSION="v0.3"
+NOTIFY_MATRIX_VERSION="v0.4"
 #
 # Required receiving services must already be set up.
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set MATRIX_ACCESS_TOKEN, MATRIX_ROOM_ID, and MATRIX_SERVER_URL in your dockcheck.config file.
 
-if [[ -z "${MATRIX_ACCESS_TOKEN:-}" ]] || [[ -z "${MATRIX_ROOM_ID}:-" ]] || [[ -z "${MATRIX_SERVER_URL}:-" ]]; then
-  printf "Matrix notification channel enabled, but required configuration variables are missing. Matrix notifications will not be sent.\n"
-
-  remove_channel matrix
-fi
-
 trigger_matrix_notification() {
-  AccessToken="${MATRIX_ACCESS_TOKEN}" # e.g. MATRIX_ACCESS_TOKEN=token-value
-  Room_id="${MATRIX_ROOM_ID}" # e.g. MATRIX_ROOM_ID=myroom
-  MatrixServer="${MATRIX_SERVER_URL}" # e.g. MATRIX_SERVER_URL=http://matrix.yourdomain.tld
+  if [[ -n "$1" ]]; then
+    matrix_channel="$1"
+  else
+    matrix_channel="matrix"
+  fi
+
+  UpperChannel="${matrix_channel^^}"
+
+  AccessTokenVar="${UpperChannel}_ACCESS_TOKEN"
+  RoomIdVar="${UpperChannel}_ROOM_ID"
+  MatrixServerVar="${UpperChannel}_SERVER_URL"
+
+  if [[ -z "${!AccessTokenVar:-}" ]] || [[ -z "${!RoomIdVar:-}" ]] || [[ -z "${!MatrixServerVar:-}" ]]; then
+    printf "The ${matrix_channel} notification channel is enabled, but required configuration variables are missing. Matrix notifications will not be sent.\n"
+
+    remove_channel matrix
+    return 0
+  fi
+
+  AccessToken="${!AccessTokenVar}" # e.g. MATRIX_ACCESS_TOKEN=token-value
+  RoomId="${!RoomIdVar}" # e.g. MATRIX_ROOM_ID=myroom
+  MatrixServer="${!MatrixServerVar}" # e.g. MATRIX_SERVER_URL=http://matrix.yourdomain.tld
   MsgBody="{\"msgtype\":\"m.text\",\"body\":\"$MessageBody\"}"
 
   # URL Example:  https://matrix.org/_matrix/client/r0/rooms/!xxxxxx:example.com/send/m.room.message?access_token=xxxxxxxx
-  curl -S -o /dev/null ${CurlArgs} -X POST "$MatrixServer/_matrix/client/r0/rooms/$Room_id/send/m.room.message?access_token=$AccessToken" -H 'Content-Type: application/json' -d "$MsgBody"
+  curl -S -o /dev/null ${CurlArgs} -X POST "$MatrixServer/_matrix/client/r0/rooms/$RoomId/send/m.room.message?access_token=$AccessToken" -H 'Content-Type: application/json' -d "$MsgBody"
 
   if [[ $? -gt 0 ]]; then
     NotifyError=true

notify_templates/notify_ntfy.sh

@@ -1,19 +1,32 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_NTFYSH_VERSION="v0.5"
+NOTIFY_NTFYSH_VERSION="v0.7"
 #
 # Setup app and subscription at https://ntfy.sh
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set NTFY_DOMAIN and NTFY_TOPIC_NAME in your dockcheck.config file.
 
-if [[ -z "${NTFY_DOMAIN:-}" ]] || [[ -z "${NTFY_TOPIC_NAME:-}" ]]; then
-  printf "Ntfy notification channel enabled, but required configuration variables are missing. Ntfy notifications will not be sent.\n"
-
-  remove_channel ntfy
-fi
-
 trigger_ntfy_notification() {
-  NtfyUrl="${NTFY_DOMAIN}/${NTFY_TOPIC_NAME}"
+  if [[ -n "$1" ]]; then
+    ntfy_channel="$1"
+  else
+    ntfy_channel="ntfy"
+  fi
+
+  UpperChannel="${ntfy_channel^^}"
+
+  NtfyDomainVar="${UpperChannel}_DOMAIN"
+  NtfyTopicNameVar="${UpperChannel}_TOPIC_NAME"
+  NtfyAuthVar="${UpperChannel}_AUTH"
+
+  if [[ -z "${!NtfyDomainVar:-}" ]] || [[ -z "${!NtfyTopicNameVar:-}" ]]; then
+    printf "The ${ntfy_channel} notification channel is enabled, but required configuration variables are missing. Ntfy notifications will not be sent.\n"
+
+    remove_channel ntfy
+    return 0
+  fi
+
+  NtfyUrl="${!NtfyDomainVar}/${!NtfyTopicNameVar}"
   # e.g.
   # NTFY_DOMAIN=ntfy.sh
   # NTFY_TOPIC_NAME=YourUniqueTopicName
@@ -24,11 +37,18 @@ trigger_ntfy_notification() {
       ContentType="Markdown: no" #text/plain
   fi
 
+  if [[ -n "${!NtfyAuthVar:-}" ]]; then
+    NtfyAuth="-u ${!NtfyAuthVar}"
+  else
+    NtfyAuth=""
+  fi
+
   curl -S -o /dev/null ${CurlArgs} \
     -H "Title: $MessageTitle" \
     -H "$ContentType"      \
     -d "$MessageBody" \
-    "$NtfyUrl"
+    $NtfyAuth \
+    -L "$NtfyUrl"
 
   if [[ $? -gt 0 ]]; then
     NotifyError=true

notify_templates/notify_pushbullet.sh

@@ -1,5 +1,5 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_PUSHBULLET_VERSION="v0.3"
+NOTIFY_PUSHBULLET_VERSION="v0.4"
 #
 # Required receiving services must already be set up.
 # Requires jq installed and in PATH.
@@ -7,15 +7,27 @@ NOTIFY_PUSHBULLET_VERSION="v0.3"
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set PUSHBULLET_TOKEN and PUSHBULLET_URL in your dockcheck.config file.
 
-if [[ -z "${PUSHBULLET_URL:-}" ]] || [[ -z "${PUSHBULLET_TOKEN:-}" ]]; then
-  printf "Pushbullet notification channel enabled, but required configuration variables are missing. Pushbullet notifications will not be sent.\n"
-
-  remove_channel pushbullet
-fi
-
 trigger_pushbullet_notification() {
-  PushUrl="${PUSHBULLET_URL}" # e.g. PUSHBULLET_URL=https://api.pushbullet.com/v2/pushes
-  PushToken="${PUSHBULLET_TOKEN}" # e.g. PUSHBULLET_TOKEN=token-value
+  if [[ -n "$1" ]]; then
+    pushbullet_channel="$1"
+  else
+    pushbullet_channel="pushbullet"
+  fi
+
+  UpperChannel="${pushbullet_channel^^}"
+
+  PushUrlVar="${UpperChannel}_URL"
+  PushTokenVar="${UpperChannel}_TOKEN"
+
+  if [[ -z "${!PushUrlVar:-}" ]] || [[ -z "${!PushTokenVar:-}" ]]; then
+    printf "The ${pushbullet_channel} notification channel is enabled, but required configuration variables are missing. Pushbullet notifications will not be sent.\n"
+
+    remove_channel pushbullet
+    return 0
+  fi
+
+  PushUrl="${!PushUrlVar}" # e.g. PUSHBULLET_URL=https://api.pushbullet.com/v2/pushes
+  PushToken="${!PushTokenVar}" # e.g. PUSHBULLET_TOKEN=token-value
 
   # Requires jq to process json data
   "$jqbin" -n --arg title "$MessageTitle" --arg body "$MessageBody" '{body: $body, title: $title, type: "note"}' | curl -S -o /dev/null ${CurlArgs} -X POST -H "Access-Token: $PushToken" -H "Content-type: application/json" $PushUrl -d @-

notify_templates/notify_pushover.sh

@@ -1,5 +1,5 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_PUSHOVER_VERSION="v0.3"
+NOTIFY_PUSHOVER_VERSION="v0.4"
 #
 # Required receiving services must already be set up.
 # Requires jq installed and in PATH.
@@ -7,16 +7,29 @@ NOTIFY_PUSHOVER_VERSION="v0.3"
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set PUSHOVER_USER_KEY, PUSHOVER_TOKEN, and PUSHOVER_URL in your dockcheck.config file.
 
-if [[ -z "${PUSHOVER_URL:-}" ]] || [[ -z "${PUSHOVER_USER_KEY:-}" ]] || [[ -z "${PUSHOVER_TOKEN:-}" ]]; then
-  printf "Pushover notification channel enabled, but required configuration variables are missing. Pushover notifications will not be sent.\n"
-
-  remove_channel pushover
-fi
-
 trigger_pushover_notification() {
-  PushoverUrl="${PUSHOVER_URL}" # e.g. PUSHOVER_URL=https://api.pushover.net/1/messages.json
-  PushoverUserKey="${PUSHOVER_USER_KEY}" # e.g. PUSHOVER_USER_KEY=userkey
-  PushoverToken="${PUSHOVER_TOKEN}" # e.g. PUSHOVER_TOKEN=token-value
+  if [[ -n "$1" ]]; then
+    pushover_channel="$1"
+  else
+    pushover_channel="pushover"
+  fi
+
+  UpperChannel="${pushover_channel^^}"
+
+  PushoverUrlVar="${UpperChannel}_URL"
+  PushoverUserKeyVar="${UpperChannel}_USER_KEY"
+  PushoverTokenVar="${UpperChannel}_TOKEN"
+
+  if [[ -z "${!PushoverUrlVar:-}" ]] || [[ -z "${!PushoverUserKeyVar:-}" ]] || [[ -z "${!PushoverTokenVar:-}" ]]; then
+    printf "The ${pushover_channel} notification channel is enabled, but required configuration variables are missing. Pushover notifications will not be sent.\n"
+
+    remove_channel pushover
+    return 0
+  fi
+
+  PushoverUrl="${!PushoverUrlVar}" # e.g. PUSHOVER_URL=https://api.pushover.net/1/messages.json
+  PushoverUserKey="${!PushoverUserKeyVar}" # e.g. PUSHOVER_USER_KEY=userkey
+  PushoverToken="${!PushoverTokenVar}" # e.g. PUSHOVER_TOKEN=token-value
 
   # Sending the notification via Pushover
   curl -S -o /dev/null ${CurlArgs} -X POST \

notify_templates/notify_slack.sh

@@ -1,20 +1,32 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_SLACK_VERSION="v0.3"
+NOTIFY_SLACK_VERSION="v0.4"
 #
 # Setup app and token at https://api.slack.com/tutorials/tracks/posting-messages-with-curl
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set SLACK_ACCESS_TOKEN, and SLACK_CHANNEL_ID in your dockcheck.config file.
 
-if [[ -z "${SLACK_ACCESS_TOKEN:-}" ]] || [[ -z "${SLACK_CHANNEL_ID:-}" ]]; then
-  printf "Slack notification channel enabled, but required configuration variables are missing. Slack notifications will not be sent.\n"
-
-  remove_channel slack
-fi
-
 trigger_slack_notification() {
-  AccessToken="${SLACK_ACCESS_TOKEN}" # e.g. SLACK_ACCESS_TOKEN=some-token
-  ChannelID="${SLACK_CHANNEL_ID}" # e.g. CHANNEL_ID=mychannel
+  if [[ -n "$1" ]]; then
+    slack_channel="$1"
+  else
+    slack_channel="slack"
+  fi
+
+  UpperChannel="${slack_channel^^}"
+
+  AccessTokenVar="${UpperChannel}_ACCESS_TOKEN"
+  ChannelIDVar="${UpperChannel}_CHANNEL_ID"
+
+  if [[ -z "${!AccessTokenVar:-}" ]] || [[ -z "${!ChannelIDVar:-}" ]]; then
+    printf "The ${slack_channel} notification channel is enabled, but required configuration variables are missing. Slack notifications will not be sent.\n"
+
+    remove_channel slack
+    return 0
+  fi
+
+  AccessToken="${!AccessTokenVar}" # e.g. SLACK_ACCESS_TOKEN=some-token
+  ChannelID="${!ChannelIDVar}" # e.g. CHANNEL_ID=mychannel
   SlackUrl="https://slack.com/api/chat.postMessage"
 
   curl -S -o /dev/null ${CurlArgs} \

notify_templates/notify_smtp.sh

@@ -1,5 +1,5 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_SMTP_VERSION="v0.3"
+NOTIFY_SMTP_VERSION="v0.5"
 # INFO: ssmtp is depcerated - consider to use msmtp instead.
 #
 # mSMTP/sSMTP has to be installed and configured manually.
@@ -7,27 +7,43 @@ NOTIFY_SMTP_VERSION="v0.3"
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set SMTP_MAIL_FROM, SMTP_MAIL_TO, and SMTP_SUBJECT_TAG in your dockcheck.config file.
 
-if [[ -z "${SMTP_MAIL_FROM:-}" ]] || [[ -z "${SMTP_MAIL_TO:-}" ]] || [[ -z "${SMTP_SUBJECT_TAG:-}" ]]; then
-  printf "SMTP notification channel enabled, but required configuration variables are missing. SMTP notifications will not be sent.\n"
-
-  remove_channel smtp
-fi
-
 MSMTP=$(which msmtp)
 SSMTP=$(which ssmtp)
+SENDMAIL=$(which sendmail)
 
 if [ -n "$MSMTP" ] ; then
 	MailPkg=$MSMTP
 elif [ -n "$SSMTP" ] ; then
 	MailPkg=$SSMTP
+elif [ -n "$SENDMAIL" ] ; then
+	MailPkg=$SENDMAIL
 else
-	echo "No msmtp or ssmtp binary found in PATH: $PATH" ; exit 1
+	echo "No msmtp, ssmtp or sendmail binary found in PATH: $PATH" ; exit 1
 fi
 
 trigger_smtp_notification() {
-SendMailFrom="${SMTP_MAIL_FROM}" # e.g. MAIL_FROM=me@mydomain.tld
-SendMailTo="${SMTP_MAIL_TO}" # e.g. MAIL_TO=me@mydomain.tld
-SubjectTag="${SMTP_SUBJECT_TAG}" # e.g. SUBJECT_TAG=dockcheck
+  if [[ -n "$1" ]]; then
+    smtp_channel="$1"
+  else
+    smtp_channel="smtp"
+  fi
+
+  UpperChannel="${smtp_channel^^}"
+
+  SendMailFromVar="${UpperChannel}_MAIL_FROM"
+  SendMailToVar="${UpperChannel}_MAIL_TO"
+  SubjectTagVar="${UpperChannel}_SUBJECT_TAG"
+
+  if [[ -z "${!SendMailFromVar:-}" ]] || [[ -z "${!SendMailToVar:-}" ]] || [[ -z "${!SubjectTagVar:-}" ]]; then
+    printf "The ${smtp_channel} notification channel is enabled, but required configuration variables are missing. SMTP notifications will not be sent.\n"
+
+    remove_channel smtp
+    return 0
+  fi
+
+  SendMailFrom="${!SendMailFromVar}" # e.g. MAIL_FROM=me@mydomain.tld
+  SendMailTo="${!SendMailToVar}" # e.g. MAIL_TO=me@mydomain.tld
+  SubjectTag="${!SubjectTagVar}" # e.g. SUBJECT_TAG=dockcheck
 
 $MailPkg $SendMailTo << __EOF
 From: "$FromHost" <$SendMailFrom>

notify_templates/notify_telegram.sh

@@ -1,28 +1,41 @@
 ### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
-NOTIFY_TELEGRAM_VERSION="v0.4"
+NOTIFY_TELEGRAM_VERSION="v0.5"
 #
 # Required receiving services must already be set up.
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
 # If you instead wish make your own modifications, make a copy in the same directory as the main dockcheck.sh script.
 # Do not modify this file directly within the "notify_templates" subdirectory. Set TELEGRAM_CHAT_ID and TELEGRAM_TOKEN in your dockcheck.config file.
 
-if [[ -z "${TELEGRAM_CHAT_ID:-}" ]] || [[ -z "${TELEGRAM_TOKEN:-}" ]]; then
-  printf "Telegram notification channel enabled, but required configuration variables are missing. Telegram notifications will not be sent.\n"
-
-  remove_channel telegram
-fi
-
 trigger_telegram_notification() {
+  if [[ -n "$1" ]]; then
+    telegram_channel="$1"
+  else
+    telegram_channel="telegram"
+  fi
+
+  UpperChannel="${telegram_channel^^}"
+
+  TelegramTokenVar="${UpperChannel}_TOKEN"
+  TelegramChatIdVar="${UpperChannel}_CHAT_ID"
+  TelegramTopicIdVar="${UpperChannel}_TOPIC_ID"
+
+  if [[ -z "${!TelegramChatIdVar:-}" ]] || [[ -z "${!TelegramTokenVar:-}" ]]; then
+    printf "The ${telegram_channel} notification channel is enabled, but required configuration variables are missing. Telegram notifications will not be sent.\n"
+
+    remove_channel telegram
+    return 0
+  fi
+
   if [[ "$PrintMarkdownURL" == true ]]; then
       ParseMode="Markdown"
   else
       ParseMode="HTML"
   fi
 
-  TelegramToken="${TELEGRAM_TOKEN}" # e.g. TELEGRAM_TOKEN=token-value
-  TelegramChatId="${TELEGRAM_CHAT_ID}" # e.g. TELEGRAM_CHAT_ID=mychatid
+  TelegramToken="${!TelegramTokenVar}" # e.g. TELEGRAM_TOKEN=token-value
+  TelegramChatId="${!TelegramChatIdVar}" # e.g. TELEGRAM_CHAT_ID=mychatid
   TelegramUrl="https://api.telegram.org/bot$TelegramToken"
-  TelegramTopicID=${TELEGRAM_TOPIC_ID:="0"}
+  TelegramTopicID=${!TelegramTopicIdVar:="0"}
 
   JsonData=$( "$jqbin" -n \
               --arg chatid "$TelegramChatId" \

notify_templates/notify_v2.sh

@@ -1,4 +1,4 @@
-NOTIFY_V2_VERSION="v0.4"
+NOTIFY_V2_VERSION="v0.6"
 #
 # If migrating from an older notify template, remove your existing notify.sh file.
 # Leave (or place) this file in the "notify_templates" subdirectory within the same directory as the main dockcheck.sh script.
@@ -13,9 +13,33 @@ NOTIFY_V2_VERSION="v0.4"
 # Actual snooze will be 60 seconds less to avoid the chance of missed notifications due to minor scheduling or script run time issues.
 snooze="${SNOOZE_SECONDS:-}"
 SnoozeFile="${ScriptWorkDir}/snooze.list"
+[[ ! -f "${SnoozeFile}" ]] && touch "${SnoozeFile}"
 
 enabled_notify_channels=( ${NOTIFY_CHANNELS:-} )
 
+# Global output string variable for modification by functions
+UpdToString=""
+FormattedOutput=""
+
+get_channel_template() {
+  local UpperChannel="${1^^}"
+  local TemplateVar="${UpperChannel}_TEMPLATE"
+  if [[ -n "${!TemplateVar:-}" ]]; then
+    printf "${!TemplateVar}"
+  else
+    printf "$1"
+  fi
+}
+
+declare -A unique_templates
+
+for channel in "${enabled_notify_channels[@]}"; do
+  template=$(get_channel_template "${channel}")
+  unique_templates["${template}"]=1
+done
+
+enabled_notify_templates=( "${!unique_templates[@]}" )
+
 FromHost=$(cat /etc/hostname)
 
 CurrentEpochTime=$(date +"%Y-%m-%dT%H:%M:%S")
@@ -23,49 +47,96 @@ CurrentEpochSeconds=$(date +%s)
 
 NotifyError=false
 
+for template in "${enabled_notify_templates[@]}"; do
+  source_if_exists_or_fail "${ScriptWorkDir}/notify_${template}.sh" || \
+  source_if_exists_or_fail "${ScriptWorkDir}/notify_templates/notify_${template}.sh" || \
+  printf "The notification channel template ${template} is enabled, but notify_${template}.sh was not found. Check the ${ScriptWorkDir} directory or the notify_templates subdirectory.\n"
+done
+
+skip_snooze() {
+  local UpperChannel="${1^^}"
+  local SkipSnoozeVar="${UpperChannel}_SKIPSNOOZE"
+  if [[ "${!SkipSnoozeVar:-}" == "true" ]]; then
+    printf "true"
+  else
+    printf "false"
+  fi
+}
+
+allow_empty() {
+  local UpperChannel="${1^^}"
+  local AllowEmptyVar="${UpperChannel}_ALLOWEMPTY"
+  if [[ "${!AllowEmptyVar:-}" == "true" ]]; then
+    printf "true"
+  else
+    printf "false"
+  fi
+}
+
+containers_only() {
+  local UpperChannel="${1^^}"
+  local ContainersOnlyVar="${UpperChannel}_CONTAINERSONLY"
+  if [[ "${!ContainersOnlyVar:-}" == "true" ]]; then
+    printf "true"
+  else
+    printf "false"
+  fi
+}
+
+output_format() {
+  local UpperChannel="${1^^}"
+  local OutputFormatVar="${UpperChannel}_OUTPUT"
+  if [[ -z "${!OutputFormatVar:-}" ]]; then
+    printf "text"
+  else
+    printf "${!OutputFormatVar:-}"
+  fi
+}
+
 remove_channel() {
   local temp_array=()
   for channel in "${enabled_notify_channels[@]}"; do
-    [[ "${channel}" != "$1" ]] && temp_array+=("${channel}")
+    local channel_template=$(get_channel_template "${channel}")
+    [[ "${channel_template}" != "$1" ]] && temp_array+=("${channel}")
   done
   enabled_notify_channels=( "${temp_array[@]}" )
 }
 
-for channel in "${enabled_notify_channels[@]}"; do
-  source_if_exists_or_fail "${ScriptWorkDir}/notify_${channel}.sh" || \
-  source_if_exists_or_fail "${ScriptWorkDir}/notify_templates/notify_${channel}.sh" || \
-  printf "The notification channel ${channel} is enabled, but notify_${channel}.sh was not found. Check the ${ScriptWorkDir} directory or the notify_templates subdirectory.\n"
-done
-
-notify_containers_count() {
-  unset NotifyContainers
-  NotifyContainers=()
-
-  [[ ! -f "${SnoozeFile}" ]] && touch "${SnoozeFile}"
-
-  for update in "$@"
-  do
-    read -a container <<< "${update}"
-    found=$(grep -w "${container[0]}" "${SnoozeFile}" || printf "")
-
+is_snoozed() {
+  if [[ -n "${snooze}" ]] && [[ -f "${SnoozeFile}" ]]; then
+    local found=$(grep -w "$1" "${SnoozeFile}" || printf "")
     if [[ -n "${found}" ]]; then
       read -a arr <<< "${found}"
       CheckEpochSeconds=$(( $(date -d "${arr[1]}" +%s 2>/dev/null) + ${snooze} - 60 )) || CheckEpochSeconds=$(( $(date -f "%Y-%m-%d" -j "${arr[1]}" +%s) + ${snooze} - 60 ))
-      if [[ "${CurrentEpochSeconds}" -gt "${CheckEpochSeconds}" ]]; then
-        NotifyContainers+=("${update}")
+      if [[ "${CurrentEpochSeconds}" -le "${CheckEpochSeconds}" ]]; then
+        printf "true"
+      else
+        printf "false"
       fi
     else
-      NotifyContainers+=("${update}")
+      printf "false"
+    fi
+  else
+    printf "false"
+  fi
+}
+
+unsnoozed_count() {
+  unset Unsnoozed
+  Unsnoozed=()
+
+  for element in "$@"
+  do
+    read -a item <<< "${element}"
+    if [[ $(is_snoozed "${item[0]}") == "false" ]]; then
+      Unsnoozed+=("${element}")
     fi
   done
 
-  printf "${#NotifyContainers[@]}"
+  printf "${#Unsnoozed[@]}"
 }
 
 update_snooze() {
-
-  [[ ! -f "${SnoozeFile}" ]] && touch "${SnoozeFile}"
-
   for arg in "$@"
   do
     read -a entry <<< "${arg}"
@@ -85,8 +156,6 @@ cleanup_snooze() {
   NotifyEntries=()
   switch=""
 
-  [[ ! -f "${SnoozeFile}" ]] && touch "${SnoozeFile}"
-
   for arg in "$@"
   do
     read -a entry <<< "${arg}"
@@ -105,41 +174,130 @@ cleanup_snooze() {
   done <<< "$(grep ${switch} '\.sh ' ${SnoozeFile})"
 }
 
+format_output() {
+  local UpdateType="$1"
+  local OutputFormat="$2"
+  local FormattedTextTemplate="$3"
+  local tempcsv=""
+
+  if [[ ! "${UpdateType}" == "dockcheck_update" ]]; then
+    tempcsv="${UpdToString//  ->  /,}"
+    tempcsv="${tempcsv//.sh /.sh,}"
+  else
+    tempcsv="${UpdToString}"
+  fi
+
+  if [[ "${OutputFormat}" == "csv" ]]; then
+    if [[ -z "${UpdToString}" ]]; then
+      FormattedOutput="None"
+    else
+      FormattedOutput="${tempcsv}"
+    fi
+  elif [[ "${OutputFormat}" == "json" ]]; then
+    if [[ -z "${UpdToString}" ]]; then
+      FormattedOutput='{"updates": []}'
+    else
+      if [[ "${UpdateType}" == "container_update" ]]; then
+        # container updates case
+        FormattedOutput=$(jq --compact-output --null-input --arg updates "${tempcsv}" '($updates | split("\\n")) | map(split(",")) | {"updates": map({"container_name": .[0], "release_notes": .[1]})} | del(..|nulls)')
+      elif [[ "${UpdateType}" == "notify_update" ]]; then
+        # script updates case
+        FormattedOutput=$(jq --compact-output --null-input --arg updates "${tempcsv}" '($updates | split("\\n")) | map(split(",")) | {"updates": map({"script_name": .[0], "installed_version": .[1], "latest_version": .[2]})}')
+      elif [[ "${UpdateType}" == "dockcheck_update" ]]; then
+        # dockcheck update case
+        FormattedOutput=$(jq --compact-output --null-input --arg updates "${tempcsv}" '($updates | split("\\n")) | map(split(",")) | {"updates": map({"script_name": .[0], "installed_version": .[1], "latest_version": .[2], "release_notes": (.[3:] | join(","))})}')
+      else
+        FormattedOutput="Invalid input"
+      fi
+    fi
+  else
+    if [[ -z "${UpdToString}" ]]; then
+      FormattedOutput="None"
+    else
+      if [[ "${UpdateType}" == "container_update" ]]; then
+        FormattedOutput="${FormattedTextTemplate/<insert_text_cu>/${UpdToString}}"
+      elif [[ "${UpdateType}" == "notify_update" ]]; then
+        FormattedOutput="${FormattedTextTemplate/<insert_text_nu>/${UpdToString}}"
+      elif [[ "${UpdateType}" == "dockcheck_update" ]]; then
+        FormattedOutput="${FormattedTextTemplate/<insert_text_iv>/$4}"
+        FormattedOutput="${FormattedOutput/<insert_text_lv>/$5}"
+        FormattedOutput="${FormattedOutput/<insert_text_rn>/$6}"
+      else
+        FormattedOutput="Invalid input"
+      fi
+    fi
+  fi
+}
+
+skip_notification() {
+  # Skip notification logic. Default to false. Handle all cases, and only those cases, where notifications should be skipped.
+  local SkipNotification="false"
+  local Channel="$1"
+  local UnsnoozedCount="$2"
+  local NotificationType="$3"
+
+  if [[ $(containers_only "${Channel}") == "true" ]] && [[ "${NotificationType}" != "container" ]]; then
+    # Do not send notifications through channels only configured for container update notifications
+    SkipNotification="true"
+  else
+    # Handle empty update cases separately
+    if [[ -z "${UpdToString}" ]]; then
+      if [[ $(allow_empty "${Channel}") == "false" ]]; then
+        # Do not send notifications if there are none and allow_empty is false
+        SkipNotification="true"
+      fi
+    else
+      if [[ $(skip_snooze "${Channel}") == "false" ]] && [[ ${UnsnoozedCount} -eq 0 ]]; then
+        # Do not send notifications if there are any, they are all snoozed, and skip_snooze is false
+        SkipNotification="true"
+      fi
+    fi
+  fi
+
+  printf "${SkipNotification}"
+}
+
 send_notification() {
   [[ -s "$ScriptWorkDir"/urls.list ]] && releasenotes || Updates=("$@")
 
-  if [[ -n "${snooze}" ]] && [[ -f "${SnoozeFile}" ]]; then
-    UpdNotifyCount=$(notify_containers_count "${Updates[@]}")
-  else
-    UpdNotifyCount="${#Updates[@]}"
-  fi
-
-  NotifyError=false
-
-  if [[ "${UpdNotifyCount}" -gt 0 ]]; then
-    UpdToString=$( printf '%s\\n' "${Updates[@]}" )
-    UpdToString=${UpdToString%\\n}
-
-    for channel in "${enabled_notify_channels[@]}"; do
-      printf "\nSending ${channel} notification\n"
-
-      # To be added in the MessageBody if "-d X" was used
-      # leading space is left intentionally for clean output
-      [[ -n "$DaysOld" ]] && msgdaysold="with images ${DaysOld}+ days old " || msgdaysold=""
-
-      MessageTitle="$FromHost - updates ${msgdaysold}available."
-      # Setting the MessageBody variable here.
-      printf -v MessageBody "🐋 Containers on $FromHost with updates available:\n${UpdToString}\n"
-
-      exec_if_exists_or_fail trigger_${channel}_notification || \
-      printf "Attempted to send notification to channel ${channel}, but the function was not found. Make sure notify_${channel}.sh is available in the ${ScriptWorkDir} directory or notify_templates subdirectory.\n"
-    done
-
-    [[ -n "${snooze}" ]] && [[ "${NotifyError}" == "false" ]] && update_snooze "${Updates[@]}"
-  fi
-
   [[ -n "${snooze}" ]] && cleanup_snooze "${Updates[@]}"
 
+  UnsnoozedContainers=$(unsnoozed_count "${Updates[@]}")
+  NotifyError=false
+  Notified="false"
+
+  # To be added in the MessageBody if "-d X" was used
+  # Trailing space is left intentionally for clean output
+  [[ -n "$DaysOld" ]] && msgdaysold="with images ${DaysOld}+ days old " || msgdaysold=""
+  MessageTitle="$FromHost - updates ${msgdaysold}available."
+
+  UpdToString=$( printf '%s\\n' "${Updates[@]}" )
+  UpdToString="${UpdToString%, }"
+  UpdToString=${UpdToString%\\n}
+
+  for channel in "${enabled_notify_channels[@]}"; do
+    local SkipNotification=$(skip_notification "${channel}" "${UnsnoozedContainers}" "container")
+    if [[ "${SkipNotification}" == "false" ]]; then
+      local template=$(get_channel_template "${channel}")
+
+      # Formats UpdToString variable per channel settings
+      format_output "container_update" "$(output_format "${channel}")" "🐋 Containers on $FromHost with updates available:\n<insert_text_cu>\n"
+
+      # Setting the MessageBody variable here.
+      printf -v MessageBody "${FormattedOutput}"
+
+      printf "\nSending ${channel} notification"
+      exec_if_exists_or_fail trigger_${template}_notification "${channel}" || \
+      printf "\nAttempted to send notification to channel ${channel}, but the function was not found. Make sure notify_${template}.sh is available in the ${ScriptWorkDir} directory or notify_templates subdirectory."
+      Notified="true"
+    fi
+  done
+
+  if [[ "${Notified}" == "true" ]]; then
+    [[ -n "${snooze}" ]] && [[ -n "${UpdToString}" ]] && [[ "${NotifyError}" == "false" ]] && update_snooze "${Updates[@]}"
+    printf "\n"
+  fi
+
   return 0
 }
 
@@ -147,46 +305,34 @@ send_notification() {
 ### to not send notifications when dockcheck itself has updates.
 dockcheck_notification() {
   if [[ ! "${DISABLE_DOCKCHECK_NOTIFICATION:-}" == "true" ]]; then
-    DockcheckNotify=false
+    UnsnoozedDockcheck=$(unsnoozed_count "dockcheck\.sh")
     NotifyError=false
+    Notified=false
 
-    if [[ -n "${snooze}" ]] && [[ -f "${SnoozeFile}" ]]; then
-      found=$(grep -w "dockcheck\.sh" "${SnoozeFile}" || printf "")
-      if [[ -n "${found}" ]]; then
-        read -a arr <<< "${found}"
-        CheckEpochSeconds=$(( $(date -d "${arr[1]}" +%s 2>/dev/null) + ${snooze} - 60 )) || CheckEpochSeconds=$(( $(date -f "%Y-%m-%d" -j "${arr[1]}" +%s) + ${snooze} - 60 ))
-        if [[ "${CurrentEpochSeconds}" -gt "${CheckEpochSeconds}" ]]; then
-          DockcheckNotify=true
-        fi
-      else
-        DockcheckNotify=true
+    MessageTitle="$FromHost - New version of dockcheck available."
+    UpdToString="dockcheck.sh,$1,$2,\"$3\""
+
+    for channel in "${enabled_notify_channels[@]}"; do
+      local SkipNotification=$(skip_notification "${channel}" "${UnsnoozedDockcheck}" "dockcheck")
+      if [[ "${SkipNotification}" == "false" ]]; then
+        local template=$(get_channel_template "${channel}")
+
+        # Formats UpdToString variable per channel settings
+        format_output "dockcheck_update" "$(output_format "${channel}")" "Installed version: <insert_text_iv>\nLatest version: <insert_text_lv>\n\nChangenotes: <insert_text_rn>\n" "$1" "$2" "$3"
+
+        # Setting the MessageBody variable here.
+        printf -v MessageBody "${FormattedOutput}"
+
+        printf "\nSending dockcheck update notification - ${channel}"
+        exec_if_exists_or_fail trigger_${template}_notification "${channel}" || \
+        printf "\nAttempted to send notification to channel ${channel}, but the function was not found. Make sure notify_${template}.sh is available in the ${ScriptWorkDir} directory or notify_templates subdirectory."
+        Notified="true"
       fi
-    else
-      DockcheckNotify=true
-    fi
+    done
 
-    if [[ "${DockcheckNotify}" == "true" ]]; then
-      MessageTitle="$FromHost - New version of dockcheck available."
-      # Setting the MessageBody variable here.
-      printf -v MessageBody "Installed version: $1\nLatest version: $2\n\nChangenotes: $3\n"
-
-      if [[ ${#enabled_notify_channels[@]} -gt 0 ]]; then printf "\n"; fi
-      for channel in "${enabled_notify_channels[@]}"; do
-        printf "Sending dockcheck update notification - ${channel}\n"
-        exec_if_exists_or_fail trigger_${channel}_notification || \
-        printf "Attempted to send notification to channel ${channel}, but the function was not found. Make sure notify_${channel}.sh is available in the ${ScriptWorkDir} directory or notify_templates subdirectory.\n"
-      done
-
-      if [[ -n "${snooze}" ]] && [[ -f "${SnoozeFile}" ]]; then
-        if [[ "${NotifyError}" == "false" ]]; then
-          if [[ -n "${found}" ]]; then
-            sed -e "s/dockcheck\.sh.*/dockcheck\.sh ${CurrentEpochTime}/" "${SnoozeFile}" > "${SnoozeFile}.new"
-            mv "${SnoozeFile}.new" "${SnoozeFile}"
-          else
-            printf "dockcheck.sh ${CurrentEpochTime}\n" >> "${SnoozeFile}"
-          fi
-        fi
-      fi
+    if [[ "${Notified}" == "true" ]]; then
+      [[ -n "${snooze}" ]] && [[ "${NotifyError}" == "false" ]] && update_snooze "dockcheck.sh"
+      printf "\n"
     fi
   fi
 
@@ -197,68 +343,63 @@ dockcheck_notification() {
 ### to not send notifications when notify scripts themselves have updates.
 notify_update_notification() {
   if [[ ! "${DISABLE_NOTIFY_NOTIFICATION:-}" == "true" ]]; then
-    NotifyUpdateNotify=false
     NotifyError=false
     NotifyUpdates=()
+    Notified=false
 
-    UpdateChannels=( "${enabled_notify_channels[@]}" "v2" )
+    UpdateChannels=( "${enabled_notify_templates[@]}" "v2" )
 
     for NotifyScript in "${UpdateChannels[@]}"; do
-      UpperChannel=$(tr '[:lower:]' '[:upper:]' <<< "$NotifyScript")
+      UpperChannel="${NotifyScript^^}"
       VersionVar="NOTIFY_${UpperChannel}_VERSION"
       if [[ -n "${!VersionVar:-}" ]]; then
         RawNotifyUrl="https://raw.githubusercontent.com/mag37/dockcheck/main/notify_templates/notify_${NotifyScript}.sh"
         LatestNotifySnippet="$(curl ${CurlArgs} -r 0-150 "$RawNotifyUrl" || printf "undefined")"
-        LatestNotifyRelease="$(echo "$LatestNotifySnippet" | sed -n "/${VersionVar}/s/${VersionVar}=//p" | tr -d '"')"
-        if [[ ! "${LatestNotifyRelease}" == "undefined" ]]; then
+        if [[ ! "${LatestNotifySnippet}" == "undefined" ]]; then
+          LatestNotifyRelease="$(echo "$LatestNotifySnippet" | sed -n "/${VersionVar}/s/${VersionVar}=//p" | tr -d '"')"
+
           if [[ "${!VersionVar}" != "${LatestNotifyRelease}" ]] ; then
-            NotifyUpdates+=("${NotifyScript}.sh ${!VersionVar} -> ${LatestNotifyRelease}")
+            NotifyUpdates+=("${NotifyScript}.sh ${!VersionVar}  ->  ${LatestNotifyRelease}")
           fi
         fi
       fi
     done
 
-    if [[ -n "${snooze}" ]] && [[ -f "${SnoozeFile}" ]]; then
-      for update in "${NotifyUpdates[@]}"; do
-        read -a NotifyScript <<< "${update}"
-        found=$(grep -w "${NotifyScript}" "${SnoozeFile}" || printf "")
-        if [[ -n "${found}" ]]; then
-          read -a arr <<< "${found}"
-          CheckEpochSeconds=$(( $(date -d "${arr[1]}" +%s 2>/dev/null) + ${snooze} - 60 )) || CheckEpochSeconds=$(( $(date -f "%Y-%m-%d" -j "${arr[1]}" +%s) + ${snooze} - 60 ))
-          if [[ "${CurrentEpochSeconds}" -gt "${CheckEpochSeconds}" ]]; then
-            NotifyUpdateNotify=true
-          fi
-        else
-          NotifyUpdateNotify=true
-        fi
-      done
-    else
-      NotifyUpdateNotify=true
-    fi
-
-    if [[ "${NotifyUpdateNotify}" == "true" ]]; then
-      if [[ "${#NotifyUpdates[@]}" -gt 0 ]]; then
-        UpdToString=$( printf '%s\\n' "${NotifyUpdates[@]}" )
-        UpdToString=${UpdToString%\\n}
-        NotifyError=false
-
-        MessageTitle="$FromHost - New version of notify templates available."
-
-        printf -v MessageBody "Notify templates on $FromHost with updates available:\n${UpdToString}\n"
-
-        for channel in "${enabled_notify_channels[@]}"; do
-          printf "Sending notify template update notification - ${channel}\n"
-          exec_if_exists_or_fail trigger_${channel}_notification || \
-          printf "Attempted to send notification to channel ${channel}, but the function was not found. Make sure notify_${channel}.sh is available in the ${ScriptWorkDir} directory or notify_templates subdirectory.\n"
-        done
-
-        [[ -n "${snooze}" ]] && [[ "${NotifyError}" == "false" ]] && update_snooze "${NotifyUpdates[@]}"
-      fi
-    fi
-
     UpdatesPlusDockcheck=("${NotifyUpdates[@]}")
     UpdatesPlusDockcheck+=("dockcheck.sh")
     [[ -n "${snooze}" ]] && cleanup_snooze "${UpdatesPlusDockcheck[@]}"
+
+    UnsnoozedTemplates=$(unsnoozed_count "${NotifyUpdates[@]}")
+
+    MessageTitle="$FromHost - New version of notify templates available."
+
+    UpdToString=$( printf '%s\\n' "${NotifyUpdates[@]}" )
+    UpdToString="${UpdToString%, }"
+    UpdToString=${UpdToString%\\n}
+
+    for channel in "${enabled_notify_channels[@]}"; do
+      local SkipNotification=$(skip_notification "${channel}" "${UnsnoozedTemplates}" "notify")
+
+      if [[ "${SkipNotification}" == "false" ]]; then
+        local template=$(get_channel_template "${channel}")
+
+        # Formats UpdToString variable per channel settings
+        format_output "notify_update" "$(output_format "${channel}")" "Notify templates on $FromHost with updates available:\n<insert_text_nu>\n"
+
+        # Setting the MessageBody variable here.
+        printf -v MessageBody "${FormattedOutput}"
+
+        printf "\nSending notify template update notification - ${channel}"
+        exec_if_exists_or_fail trigger_${template}_notification "${channel}" || \
+        printf "\nAttempted to send notification to channel ${channel}, but the function was not found. Make sure notify_${template}.sh is available in the ${ScriptWorkDir} directory or notify_templates subdirectory."
+        Notified="true"
+      fi
+    done
+
+    if [[ "${Notified}" == "true" ]]; then
+      [[ -n "${snooze}" ]] && [[ -n "${UpdToString}" ]] && [[ "${NotifyError}" == "false" ]] && update_snooze "${NotifyUpdates[@]}"
+      printf "\n"
+    fi
   fi
 
   return 0