Add Discord notification

notify/discord.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env sh
+
+#Support Discord webhooks
+
+# Required:
+#DISCORD_WEBHOOK_URL=""
+# Optional:
+#DISCORD_USERNAME=""
+#DISCORD_AVATAR_URL=""
+
+discord_send() {
+  _subject="$1"
+  _content="$2"
+  _statusCode="$3" #0: success, 1: error 2($RENEW_SKIP): skipped
+  _debug "_statusCode" "$_statusCode"
+
+  DISCORD_WEBHOOK_URL="${DISCORD_WEBHOOK_URL:-$(_readaccountconf_mutable DISCORD_WEBHOOK_URL)}"
+  if [ -z "$DISCORD_WEBHOOK_URL" ]; then
+    DISCORD_WEBHOOK_URL=""
+    _err "You didn't specify a Discord webhook url DISCORD_WEBHOOK_URL yet."
+    return 1
+  fi
+  _saveaccountconf_mutable DISCORD_WEBHOOK_URL "$DISCORD_WEBHOOK_URL"
+
+  DISCORD_USERNAME="${DISCORD_USERNAME:-$(_readaccountconf_mutable DISCORD_USERNAME)}"
+  if [ -n "$DISCORD_USERNAME" ]; then
+    _saveaccountconf_mutable DISCORD_USERNAME "$DISCORD_USERNAME"
+  fi
+
+  DISCORD_AVATAR_URL="${DISCORD_AVATAR_URL:-$(_readaccountconf_mutable DISCORD_AVATAR_URL)}"
+  if [ -n "$DISCORD_AVATAR_URL" ]; then
+    _saveaccountconf_mutable DISCORD_AVATAR_URL "$DISCORD_AVATAR_URL"
+  fi
+
+  export _H1="Content-Type: application/json"
+
+  _content="$(printf "**%s**\n%s" "$_subject" "$_content" | _json_encode)"
+  _data="{\"content\": \"$_content\" "
+  if [ -n "$DISCORD_USERNAME" ]; then
+    _data="$_data, \"username\": \"$DISCORD_USERNAME\" "
+  fi
+  if [ -n "$DISCORD_AVATAR_URL" ]; then
+    _data="$_data, \"avatar_url\": \"$DISCORD_AVATAR_URL\" "
+  fi
+  _data="$_data}"
+
+  if _post "$_data" "$DISCORD_WEBHOOK_URL?wait=true"; then
+    # shellcheck disable=SC2154
+    if [ -n "$response" ]; then
+      _info "discord send success."
+      return 0
+    fi
+  fi
+  _err "discord send error."
+  _err "$response"
+  return 1
+}