From 9814c3a525b230d30eb02ff86d3af0e97e2a74be Mon Sep 17 00:00:00 2001
From: nexy7574 <git@nexy7574.co.uk>
Date: Wed, 9 Apr 2025 03:25:07 +0100
Subject: [PATCH] Add a button to remove all loaded timeline events from user

---
 web/src/ui/rightpanel/UserModeration.tsx | 73 +++++++++++++++++++++++-
 1 file changed, 70 insertions(+), 3 deletions(-)

diff --git a/web/src/ui/rightpanel/UserModeration.tsx b/web/src/ui/rightpanel/UserModeration.tsx
index 3f2d586..147c04c 100644
--- a/web/src/ui/rightpanel/UserModeration.tsx
+++ b/web/src/ui/rightpanel/UserModeration.tsx
@@ -15,13 +15,15 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 import { use } from "react"
 import Client from "@/api/client.ts"
-import { RoomStateStore } from "@/api/statestore"
+import { RoomStateStore, useRoomTimeline } from "@/api/statestore"
 import { MemDBEvent, MembershipAction } from "@/api/types"
+import { useRoomContext } from "@/ui/roomview/roomcontext.ts"
 import ConfirmWithMessageModal from "../menu/ConfirmWithMessageModal.tsx"
 import { getPowerLevels } from "../menu/util.ts"
 import { ModalContext } from "../modal"
 import StartDMButton from "./StartDMButton.tsx"
 import UserIgnoreButton from "./UserIgnoreButton.tsx"
+import DeleteIcon from "@/icons/delete.svg?react"
 import BanIcon from "@/icons/gavel.svg?react"
 import InviteIcon from "@/icons/person-add.svg?react"
 import KickIcon from "@/icons/person-remove.svg?react"
@@ -35,7 +37,9 @@ interface UserModerationProps {
 
 const UserModeration = ({ userID, client, member, room }: UserModerationProps) => {
 	const openModal = use(ModalContext)
-	const hasPL = (action: "invite" | "kick" | "ban") => {
+	const roomCtx = useRoomContext()
+	const timeline = useRoomTimeline(roomCtx.store)
+	const hasPL = (action: "invite" | "kick" | "ban" | "redact") => {
 		if (!room) {
 			throw new Error("hasPL called without room")
 		}
@@ -44,7 +48,7 @@ const UserModeration = ({ userID, client, member, room }: UserModerationProps) =
 			return ownPL >= (pls.invite ?? 0)
 		}
 		const otherUserPL = pls.users?.[userID] ?? pls.users_default ?? 0
-		return ownPL >= (pls[action] ?? 50) && ownPL > otherUserPL
+		return ownPL >= (pls[action] ?? pls.state_default ?? 50) && ownPL > otherUserPL
 	}
 
 	const runAction = (action: MembershipAction) => {
@@ -76,6 +80,63 @@ const UserModeration = ({ userID, client, member, room }: UserModerationProps) =
 			})
 		}
 	}
+	const calculateRedactions = () => {
+		if (!room) {
+			return []
+		}
+		return timeline.filter(evt => {
+			return evt !== null && evt.room_id == room.roomID && evt.sender === userID && !evt.redacted_by
+		}) as MemDBEvent[]  // there's no nulls in this one
+	}
+	const redactRecentMessages = () => {
+		if (!room) {
+			throw new Error("redactRecentMessages called without room")
+		}
+		const callback = async (reason: string) => {
+			const tasks = []
+			for (const evt of calculateRedactions()) {
+				// for(let i=0;i<3;i++) {
+				// 	try {
+				// 		await client.rpc.redactEvent(evt.room_id, evt.event_id, reason)
+				// 		break
+				// 	} catch (e) {
+				// 		// If the error is a 429, retry.
+				// 		// TODO: get the ratelimit from the error and use it for a more precise sleep
+				// 		if (e instanceof Error && e.message.includes("M_LIMIT_EXCEEDED")) {
+				// 			const retryAfter = (2 ** i) + Math.random()
+				// 			console.warn("Rate limited, retrying in %.2f seconds...", retryAfter)
+				// 			await new Promise(resolve => setTimeout(resolve, retryAfter * 1000))
+				// 		} else {
+				// 			throw e
+				// 		}
+				// 	}
+				// }
+				tasks.push(client.rpc.redactEvent(evt.room_id, evt.event_id, reason))
+			}
+			Promise.all(tasks).catch((e) => {
+				console.error(e)
+				window.alert(`Failed to redact events: ${e}`)
+			})
+			return true
+		}
+		const evtCount = calculateRedactions().length
+		return () => {
+			openModal({
+				dimmed: true,
+				boxed: true,
+				innerBoxClass: "confirm-message-modal",
+				content: <ConfirmWithMessageModal
+					title={`Redact recent timeline events of ${userID}`}
+					description={
+						<>Are you sure you want to redact all currently loaded timeline events
+							of <code>{userID}</code>? This will remove approximately {evtCount} events.</>}
+					placeholder="Reason (optional)"
+					confirmButton={`Redact ~${evtCount} events`}
+					onConfirm={callback}
+				/>,
+			})
+		}
+	}
 	const membership = member?.content.membership || "leave"
 
 	return <div className="user-moderation">
@@ -111,6 +172,12 @@ const UserModeration = ({ userID, client, member, room }: UserModerationProps) =
 				<span>Unban</span>
 			</button>
 		)}
+		{room && hasPL("redact") && (
+			<button className="moderation-action dangerous" onClick={redactRecentMessages()}>
+				<DeleteIcon />
+				<span>Redact recent messages</span>
+			</button>
+		)}
 		<UserIgnoreButton userID={userID} client={client} />
 	</div>
 }