Fix part of #5344: Update models to support classrooms (#5418)

<!-- READ ME FIRST: Please fill in the explanation section below and
check off every point from the Essential Checklist! -->
## Explanation
<!--
- Explain what your PR does. If this PR fixes an existing bug, please
include
- "Fixes #bugnum:" in the explanation so that GitHub can auto-close the
issue
  - when this PR is merged.
  -->

Fixes part of #5344

- Introduces models for `ClassroomIdList`, `ClassroomSummary`, &
`EphemeralClassroomSummary` and updates `ClassroomList` to contain a
list of `EphemeralClassroomSummary`s and a
`written_translation_context`.
- Topic and Story models are updated to include reference to
`classroomId` & `classroomTitle`.
- Test json & textproto data files are also added for 3 test classrooms,
alongwith updating existing topic data files to include classroom
information.

## Essential Checklist
<!-- Please tick the relevant boxes by putting an "x" in them. -->
- [x] The PR title and explanation each start with "Fix #bugnum: " (If
this PR fixes part of an issue, prefix the title with "Fix part of
#bugnum: ...".)
- [x] Any changes to
[scripts/assets](https://github.com/oppia/oppia-android/tree/develop/scripts/assets)
files have their rationale included in the PR explanation.
- [x] The PR follows the [style
guide](https://github.com/oppia/oppia-android/wiki/Coding-style-guide).
- [x] The PR does not contain any unnecessary code changes from Android
Studio
([reference](https://github.com/oppia/oppia-android/wiki/Guidance-on-submitting-a-PR#undo-unnecessary-changes)).
- [x] The PR is made from a branch that's **not** called "develop" and
is up-to-date with "develop".
- [x] The PR is **assigned** to the appropriate reviewers
([reference](https://github.com/oppia/oppia-android/wiki/Guidance-on-submitting-a-PR#clarification-regarding-assignees-and-reviewers-section)).

## For UI-specific PRs only
<!-- Delete these section if this PR does not include UI-related
changes. -->
If your PR includes UI-related changes, then:
- Add screenshots for portrait/landscape for both a tablet & phone of
the before & after UI changes
- For the screenshots above, include both English and pseudo-localized
(RTL) screenshots (see [RTL
guide](https://github.com/oppia/oppia-android/wiki/RTL-Guidelines))
- Add a video showing the full UX flow with a screen reader enabled (see
[accessibility
guide](https://github.com/oppia/oppia-android/wiki/Accessibility-A11y-Guide))
- For PRs introducing new UI elements or color changes, both light and
dark mode screenshots must be included
- Add a screenshot demonstrating that you ran affected Espresso tests
locally & that they're passing

domain/BUILD.bazel

@@ -37,6 +37,11 @@ MIGRATED_PROD_FILES = glob([
 
 DOMAIN_ASSETS = generate_assets_list_from_text_protos(
     name = "domain_assets",
+    classroom_file_names = [
+        "test_classroom_id_0",
+        "test_classroom_id_1",
+        "test_classroom_id_2",
+    ],
     classroom_list_file_names = [
         "classrooms",
     ],

domain/domain_assets.bzl

@@ -6,6 +6,7 @@ load("//model:text_proto_assets.bzl", "generate_proto_binary_assets")
 
 def generate_assets_list_from_text_protos(
         name,
+        classroom_file_names,
         classroom_list_file_names,
         topic_file_names,
         subtopic_file_names,
@@ -17,6 +18,7 @@ def generate_assets_list_from_text_protos(
 
     Args:
         name: str. The name of this generation instance. This will be a prefix for derived targets.
+        classroom_file_names: list of str. The list of classroom file names.
         classroom_list_file_names: list of str. The classroom list file names.
         topic_file_names: list of str. The list of topic file names.
         subtopic_file_names: list of str. The list of subtopic file names.
@@ -31,8 +33,17 @@ def generate_assets_list_from_text_protos(
         name = name,
         names = classroom_list_file_names,
         proto_dep_name = "topic",
-        proto_type_name = "ClassroomList",
-        name_prefix = "classroom_list",
+        proto_type_name = "ClassroomIdList",
+        name_prefix = "classroom_id_list",
+        asset_dir = "src/main/assets",
+        proto_dep_bazel_target_prefix = "//model/src/main/proto",
+        proto_package = "model",
+    ) + generate_proto_binary_assets(
+        name = name,
+        names = classroom_file_names,
+        proto_dep_name = "topic",
+        proto_type_name = "ClassroomRecord",
+        name_prefix = "classroom_record",
         asset_dir = "src/main/assets",
         proto_dep_bazel_target_prefix = "//model/src/main/proto",
         proto_package = "model",

domain/src/main/assets/classrooms.json

@@ -1,12 +1,3 @@
 {
-  "classrooms": [{
-    "id": "test_classroom_id_0",
-    "topic_prerequisites": {
-      "test_topic_id_0": ["GJ2rLXRKD5hw"],
-      "test_topic_id_1": ["test_topic_id_0", "omzF4oqgeTXd"],
-      "test_topic_id_2": [],
-      "GJ2rLXRKD5hw": [],
-      "omzF4oqgeTXd": []
-    }
-  }]
+  "classroom_id_list": ["test_classroom_id_0", "test_classroom_id_1", "test_classroom_id_2"]
 }

domain/src/main/assets/classrooms.textproto

@@ -1,31 +1,3 @@
-classrooms {
-  id: "test_classroom_id_0"
-  topic_prerequisites {
-    key: "test_topic_id_0"
-    value {
-      topic_ids: "GJ2rLXRKD5hw"
-    }
-  }
-  topic_prerequisites {
-    key: "test_topic_id_1"
-    value {
-      topic_ids: "test_topic_id_0"
-      topic_ids: "omzF4oqgeTXd"
-    }
-  }
-  topic_prerequisites {
-    key: "test_topic_id_2"
-    value {
-    }
-  }
-  topic_prerequisites {
-    key: "GJ2rLXRKD5hw"
-    value {
-    }
-  }
-  topic_prerequisites {
-    key: "omzF4oqgeTXd"
-    value {
-    }
-  }
-}
+classroom_ids: "test_classroom_id_0"
+classroom_ids: "test_classroom_id_1"
+classroom_ids: "test_classroom_id_2"

domain/src/main/assets/test_classroom_id_0.json

@@ -0,0 +1,13 @@
+{
+  "classroom_id": "test_classroom_id_0",
+  "classroom_title": {
+    "content_id": "classroom_title",
+    "html": "Science"
+  },
+  "thumbnail_bg_color": "#00FFFFFF",
+  "thumbnail_filename": "",
+  "topic_prerequisites": {
+    "test_topic_id_0": ["GJ2rLXRKD5hw"],
+    "test_topic_id_1": ["test_topic_id_0", "omzF4oqgeTXd"]
+  }
+}

domain/src/main/assets/test_classroom_id_0.textproto

@@ -0,0 +1,20 @@
+id: "test_classroom_id_0"
+translatable_title {
+  content_id: "classroom_title"
+  html: "Science"
+}
+classroom_thumbnail {
+}
+topic_prerequisites {
+  key: "test_topic_id_0"
+  value {
+    topic_ids: "GJ2rLXRKD5hw"
+  }
+}
+topic_prerequisites {
+  key: "test_topic_id_1"
+  value {
+    topic_ids: "test_topic_id_0"
+    topic_ids: "omzF4oqgeTXd"
+  }
+}

domain/src/main/assets/test_classroom_id_1.json

@@ -0,0 +1,13 @@
+{
+  "classroom_id": "test_classroom_id_1",
+  "classroom_title": {
+    "content_id": "classroom_title",
+    "html": "Maths"
+  },
+  "thumbnail_bg_color": "#00FFFFFF",
+  "thumbnail_filename": "",
+  "topic_prerequisites": {
+    "GJ2rLXRKD5hw": [],
+    "omzF4oqgeTXd": []
+  }
+}

domain/src/main/assets/test_classroom_id_1.textproto

@@ -0,0 +1,17 @@
+id: "test_classroom_id_1"
+translatable_title {
+  content_id: "classroom_title"
+  html: "Maths"
+}
+classroom_thumbnail {
+}
+topic_prerequisites {
+  key: "GJ2rLXRKD5hw"
+  value {
+  }
+}
+topic_prerequisites {
+  key: "omzF4oqgeTXd"
+  value {
+  }
+}

domain/src/main/assets/test_classroom_id_2.json

@@ -0,0 +1,12 @@
+{
+  "classroom_id": "test_classroom_id_2",
+  "classroom_title": {
+    "content_id": "classroom_title",
+    "html": "English"
+  },
+  "thumbnail_bg_color": "#00FFFFFF",
+  "thumbnail_filename": "",
+  "topic_prerequisites": {
+    "test_topic_id_2": []
+  }
+}

domain/src/main/assets/test_classroom_id_2.textproto

@@ -0,0 +1,12 @@
+id: "test_classroom_id_2"
+translatable_title {
+  content_id: "classroom_title"
+  html: "English"
+}
+classroom_thumbnail {
+}
+topic_prerequisites {
+  key: "test_topic_id_2"
+  value {
+  }
+}