fix for realtime multiple subscription 15x

[lohanidamodar]

What does this PR do?

• latest updated PR for fix for realtime calling subscription multiple time - Appwrite 1.4.x #713

Test Plan

(Write your test plan here. If you changed any code, please provide us with clear instructions on how you verified your changes work.)

Related PRs and Issues

• fix for realtime calling subscription multiple time - Appwrite 1.4.x #713

Have you read the Contributing Guidelines on issues?

(Write your answer here.)

[stnguyen90]

Sorry, I'll try to get to this on Monday.

[stnguyen90]

I'm still getting 2 events:

[stnguyen90]

@lohanidamodar, I think the problem is if you subscribe multiple times in a loop like:

    try {
      final document = await widget.database.listDocuments(
        databaseId: ID.custom(databaseId),
        collectionId: ID.custom(collectionId), //change your collection id
      );
      for (var doc in document.documents) {
        _subscribe(
            ['databases.default.collections.usernames.documents.${doc.$id}']);
      }
    } on AppwriteException catch (e) {
      print(e.message);
    }

This can be called multiple times, creating multiple websockets. In this case 5:

[abnegate]

There's a few places we need to revert back from Appwrite to a template substitution

[lohanidamodar]

There's a few places we need to revert back from Appwrite to a template substitution

Updated

[lohanidamodar]

@stnguyen90 updated