feat(chat): support message recall within 30 days

[SeniorZhai]

Summary

• Allow recalling eligible messages sent within 30 days.
• Allow private-conversation participants to recall each other's messages.
• Allow group owners and admins to recall messages from any group member.
• Record the recalled message ID and the recalling user's ID in recall_messages.
• Show the recalling user's name in the deleted-message placeholder.

Validation

• ./gradlew :app:compileGooglePlayDebugKotlin

[Copilot]

Pull request overview

Adds 30-day message recall with expanded participant/admin permissions and recalling-user attribution.

Changes:

• Extends recall eligibility and adds tests.
• Persists and transfers recall attribution.
• Displays the recalling user in the primary chat placeholder.

Reviewed changes

Copilot reviewed 26 out of 27 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
MessageRecallTest.kt	Tests recall eligibility.
values/strings.xml	Adds English attribution text.
values-zh-rTW/strings.xml	Adds Traditional Chinese text.
values-zh-rCN/strings.xml	Adds Simplified Chinese text.
RecallMessage.kt	Defines recall attribution entity.
MessageItem.kt	Adds attribution and eligibility logic.
TransferDataType.kt	Adds recall transfer type.
TransferServer.kt	Exports recall records.
TransferInserter.kt	Imports recall records.
TransferClient.kt	Processes recall transfer data.
RecallHolder.kt	Shows recalling user in chat.
ConversationFragment.kt	Applies expanded recall permissions.
SendMessageJob.kt	Records local recall actor.
Injector.kt	Injects recall DAO.
DecryptMessage.kt	Records remote recall actor.
BaseJob.kt	Exposes recall DAO to jobs.
TimeExtension.kt	Adds 30-day age check.
BaseDbModule.kt	Provides recall DAO.
RecallMessageDao.kt	Implements recall persistence queries.
DataConverter.kt	Maps recall attribution fields.
MixinDatabaseMigrations.kt	Creates recall table.
MixinDatabase.kt	Registers entity, DAO, and migration.
MessageDao.kt	Joins recall attribution.
MessageFetcher.kt	Fetches recall attribution.
DaoExtension.kt	Cleans associated recall records.
Constants.kt	Increments database version.
72.json	Records Room schema version 72.

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[Copilot]

Pull request overview

Copilot reviewed 26 out of 27 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 26 out of 27 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 35 out of 36 changed files in this pull request and generated no new comments.

Suppressed comments (5)

app/src/main/java/one/mixin/android/db/MixinDatabaseMigrations.kt:617

• This migration leaves all pre-upgrade MESSAGE_RECALL rows without recaller metadata, so existing placeholders cannot show a name and device transfer also omits that attribution. Before this feature, recall was sender-only, so backfill these rows from the original message's user_id while migrating.

                    db.execSQL("CREATE TABLE IF NOT EXISTS `recall_messages` (`message_id` TEXT NOT NULL, `user_id` TEXT NOT NULL, PRIMARY KEY(`message_id`))")

app/src/main/java/one/mixin/android/widget/QuoteView.kt:101

• Persisted quote_content created by older versions has no recallUserId, so a legacy message recalled by the current user now falls through to “This message was deleted”; the previous code identified it via userId. Preserve that sender fallback only when the new recaller ID is absent.
  app/src/main/java/one/mixin/android/ui/home/ConversationListFragment.kt:996
• Older databases and transfers do not have a recall_messages entry, so existing self-recalled conversation previews now lose the previous “You deleted” text. Fall back to the original sender only when recallUserId is unavailable.

                            conversationItem.recallUserId == id -> {
                                binding.msgTv.setText(R.string.You_deleted_this_message)
                            }

app/src/main/java/one/mixin/android/ui/conversation/holder/RecallHolder.kt:37

• Recall rows created before this metadata table existed have no recallUserId; this changes the current user's old self-recalled messages from “You deleted” to the generic placeholder. Retain the existing isMe inference when the new ID is absent.

                messageItem.recallUserId == meId -> ctx.getString(R.string.You_deleted_this_message) + " "

app/src/main/java/one/mixin/android/ui/conversation/chathistory/holder/RecallHolder.kt:36

• Transferred or historical recall items can lack the new metadata, causing legacy self-recalled entries in chat history to regress to the generic placeholder. Use the existing isMe value as the fallback only when recallUserId is null.

                messageItem.recallUserId == meId -> ctx.getString(R.string.You_deleted_this_message) + " "