First commit!

server/backend/app/blueprints/watchers.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from flask import Blueprint, jsonify, request
+from app.decorators import require_header_token
+from app.classes.watchers import Watcher
+
+import json
+
+watchers_bp = Blueprint("watchers", __name__)
+watcher = Watcher()
+
+@watchers_bp.route('/add', methods=['POST'])
+@require_header_token
+def add_instance():
+    """
+        Parse and add a watcher instance.
+        :return: status of the operation in JSON
+    """
+    data = json.loads(request.data)
+    res = watcher.add_instance(data["data"]["instance"])
+    return jsonify(res)
+
+@watchers_bp.route('/delete/<watcher_id>', methods=['GET'])
+@require_header_token
+def delete_instance(watcher_id):
+    """
+        Delete a watcher by its id.
+        :return: status of the operation in JSON
+    """
+    res = watcher.delete_instance(watcher_id)
+    return jsonify(res)
+
+@watchers_bp.route('/get_all', methods=['GET'])
+@require_header_token
+def get_all():
+    """
+        Retreive a list of all watchers.
+        :return: list of watcher instances in JSON.
+    """
+    res = watcher.get_instances()
+    return jsonify({"results": [i for i in res]})