ntfy notification bug fixes (#197)

notify_templates/notify_ntfy.sh

@@ -0,0 +1,32 @@
+### DISCLAIMER: This is a third party addition to dockcheck - best effort testing.
+NOTIFY_NTFY_VERSION="v0.4"
+#
+# 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}"
+  # e.g.
+  # NTFY_DOMAIN=ntfy.sh
+  # NTFY_TOPIC_NAME=YourUniqueTopicName
+
+  if [[ "$PrintMarkdownURL" == true ]]; then
+      ContentType="Markdown: yes"
+  else
+      ContentType="Markdown: no" #text/plain
+  fi
+
+  curl -sS -o /dev/null --show-error --fail \
+    -H "Title: $MessageTitle" \
+    -H "$ContentType"      \
+    -d "$MessageBody" \
+    "$NtfyUrl"
+}