Display sender name in last message for group clip clops (#10320)

Co-authored-by: Samuel Newman <mozzius@protonmail.com>

src/components/dms/getMessageInfo.ts

@@ -0,0 +1,93 @@
+import {AppBskyEmbedRecord, ChatBskyConvoDefs} from '@atproto/api'
+import {type I18n} from '@lingui/core'
+import {msg} from '@lingui/core/macro'
+
+import {createSanitizedDisplayName} from '#/lib/moderation/create-sanitized-display-name'
+import {
+  postUriToRelativePath,
+  toBskyAppUrl,
+  toShortUrl,
+} from '#/lib/strings/url-helpers'
+
+export type UserMessageInfo = {
+  message: string | null
+  sentAt: string
+  reportableMessage?: ChatBskyConvoDefs.MessageView
+}
+
+export function getMessageInfo({
+  convo,
+  currentAccountDid,
+  i18n,
+}: {
+  convo: ChatBskyConvoDefs.ConvoView
+  currentAccountDid: string | undefined
+  i18n: I18n
+}): UserMessageInfo | null {
+  if (!ChatBskyConvoDefs.isMessageView(convo.lastMessage)) {
+    return null
+  }
+
+  const lastMessage = convo.lastMessage
+  const isFromMe = lastMessage.sender?.did === currentAccountDid
+  const senderDid = lastMessage.sender?.did
+  const sender = convo.members.find(m => m.did === senderDid)
+  const name = sender ? createSanitizedDisplayName(sender) : null
+  const isGroup = ChatBskyConvoDefs.isGroupConvo(convo.kind)
+
+  const reportableMessage = isFromMe ? undefined : lastMessage
+
+  const prefix = (message: string) => {
+    if (isFromMe) {
+      return i18n._(
+        msg({
+          message: `You: ${message}`,
+          comment: 'When the last message in a chat was made by you.',
+        }),
+      )
+    } else if (isGroup && name) {
+      return i18n._(
+        msg({
+          message: `${name}: ${message}`,
+          comment:
+            'When the last message in a group chat came from someone other than you.',
+        }),
+      )
+    }
+    return message
+  }
+
+  let message: string | null = null
+
+  if (lastMessage.text) {
+    message = prefix(lastMessage.text)
+  } else if (lastMessage.embed) {
+    const defaultEmbeddedContentMessage = i18n._(
+      msg`(contains embedded content)`,
+    )
+
+    if (AppBskyEmbedRecord.isView(lastMessage.embed)) {
+      const embed = lastMessage.embed
+
+      if (AppBskyEmbedRecord.isViewRecord(embed.record)) {
+        const record = embed.record
+        const path = postUriToRelativePath(record.uri, {
+          handle: record.author.handle,
+        })
+        const href = path ? toBskyAppUrl(path) : undefined
+        const short = href ? toShortUrl(href) : defaultEmbeddedContentMessage
+        message = prefix(short)
+      } else {
+        message = prefix(defaultEmbeddedContentMessage)
+      }
+    } else {
+      message = prefix(defaultEmbeddedContentMessage)
+    }
+  }
+
+  return {
+    message,
+    sentAt: lastMessage.sentAt,
+    reportableMessage,
+  }
+}