add support for Gotify push notifications

app/jobs/PushNotify.job.js

@@ -0,0 +1,31 @@
+const { Job } = require('flitter-jobs')
+
+class PushNotifyJob extends Job {
+    static get services() {
+        return [...super.services, 'models', 'jobs', 'output']
+    }
+
+    async execute(job) {
+        try {
+            const User = this.models.get('auth:User')
+
+            const { data } = job
+            let { title = '', message, priority = 5, user_id } = data
+
+            const user = await User.findById(user_id)
+            if ( !user ) throw new Error('Invalid user_id.')
+
+            const notify = user.notify_config
+            if ( !notify || !notify.active ) throw new Error('User does not have notifications configured.')
+
+            this.output.info(`Sending notification to ${user.uid}...`)
+
+            await notify.send({ title, message, priority })
+        } catch (e) {
+            this.output.error(e)
+        }
+        this.output.success(`Notification sent!`)
+    }
+}
+
+module.exports = exports = PushNotifyJob