Add notification, allow watch boards / lists / cards

server/notifications/notifications.js

@@ -0,0 +1,48 @@
+// a map of notification service, like email, web, IM, qq, etc.
+
+// serviceName -> callback(user, title, description, params)
+// expected arguments to callback:
+// - user: Meteor user object
+// - title: String, TAPi18n key
+// - description, String, TAPi18n key
+// - params: Object, values extracted from context, to used for above two TAPi18n keys
+//   see example call to Notifications.notify() in models/activities.js
+const notifyServices = {};
+
+Notifications = {
+  subscribe: (serviceName, callback) => {
+    notifyServices[serviceName] = callback;
+  },
+
+  unsubscribe: (serviceName) => {
+    if (typeof notifyServices[serviceName] === 'function')
+      delete notifyServices[serviceName];
+  },
+
+  // filter recipients according to user settings for notification
+  getUsers: (participants, watchers) => {
+    const userMap = {};
+    participants.forEach((userId) => {
+      if (userMap[userId]) return;
+      const user = Users.findOne(userId);
+      if (user && user.hasTag('notify-participate')) {
+        userMap[userId] = user;
+      }
+    });
+    watchers.forEach((userId) => {
+      if (userMap[userId]) return;
+      const user = Users.findOne(userId);
+      if (user && user.hasTag('notify-watch')) {
+        userMap[userId] = user;
+      }
+    });
+    return _.map(userMap, (v) => v);
+  },
+
+  notify: (user, title, description, params) => {
+    for(const k in notifyServices) {
+      const notifyImpl = notifyServices[k];
+      if (notifyImpl && typeof notifyImpl === 'function') notifyImpl(user, title, description, params);
+    }
+  },
+};