basic scheduling of backend scripts using attributes

src/services/scheduler.js

@@ -0,0 +1,26 @@
+const script = require('./script');
+const Repository = require('./repository');
+
+const repo = new Repository();
+
+async function runNotesWithAttribute(runAttrValue) {
+    const notes = await repo.getEntities(`
+        SELECT notes.* 
+        FROM notes 
+          JOIN attributes ON attributes.noteId = notes.noteId
+                           AND attributes.name = 'run' 
+                           AND attributes.value = ? 
+        WHERE
+          notes.type = 'code'
+          AND notes.isDeleted = 0`, [runAttrValue]);
+
+    for (const note of notes) {
+        script.executeNote(note);
+    }
+}
+
+setTimeout(() => runNotesWithAttribute('on_startup'), 10 * 1000);
+
+setInterval(() => runNotesWithAttribute('hourly'), 3600 * 1000);
+
+setInterval(() => runNotesWithAttribute('daily'), 24 * 3600 * 1000);