From f4b13dbde4584d23524a65d530d9c56cac6b16c8 Mon Sep 17 00:00:00 2001
From: Cadence Ember <cadence@disroot.org>
Date: Mon, 9 Nov 2020 01:11:28 +1300
Subject: [PATCH] Send own typing status

---
 src/js/chat-input.js              | 61 +++++++++++++++++++++++++++++++
 src/js/store/subscribe_value.js   |  2 +-
 src/js/typing.js                  |  7 +++-
 src/sass/components/messages.sass |  1 +
 4 files changed, 69 insertions(+), 2 deletions(-)

diff --git a/src/js/chat-input.js b/src/js/chat-input.js
index 9558746..23d06fe 100644
--- a/src/js/chat-input.js
+++ b/src/js/chat-input.js
@@ -5,24 +5,85 @@ const {chat} = require("./chat.js")
 
 const input = q("#c-chat-textarea")
 
+class TypingManager {
+	constructor() {
+		this.time = 20000 // how long to appear to type for
+		this.margin = 5000 // how long before the end of the timeout to send the request again
+		/** The room that we're typing in. We can semantically only type in one room at a time. */
+		this.typingRoom = null
+		this.timeout = null
+	}
+
+	request(id, typing) {
+		const url = new URL(`${lsm.get("domain")}/_matrix/client/r0/rooms/${id}/typing/${lsm.get("mx_user_id")}`)
+		url.searchParams.set("access_token", lsm.get("access_token"))
+		const body = {typing}
+		if (typing) body.timeout = this.time
+		fetch(url.toString(), {
+			method: "PUT",
+			body: JSON.stringify(body)
+		})
+	}
+
+	schedule(id) {
+		this.request(id, true)
+		this.timeout = setTimeout(() => {
+			this.schedule(id)
+		}, this.time - this.margin)
+	}
+
+	update(id) {
+		if (id) { // typing somewhere
+			if (this.typingRoom === id) return // already typing, don't do anything
+			// state
+			this.typingRoom = id
+			// mark and schedule
+			this.schedule(id)
+			// add self to typing list now instead of waiting a round trip
+			const typing = store.rooms.get(id).value().timeline.typing
+			typing.edit(list => list.concat(lsm.get("mx_user_id")))
+		} else { // stopped typing
+			if (this.typingRoom) {
+				clearTimeout(this.timeout)
+				this.request(this.typingRoom, false)
+			}
+			this.typingRoom = null
+		}
+	}
+}
+
+const typingManager = new TypingManager()
+
 store.activeRoom.subscribe("changeSelf", () => {
+	// stop typing. you semantically can't type in a room you're not in.
+	typingManager.update(null)
+	// focus input box
 	if (store.activeRoom.exists()) {
 		input.focus()
 	}
 })
 
 input.addEventListener("keydown", event => {
+	if (!store.activeRoom.exists()) return
+	// send message?
 	if (event.key === "Enter" && !event.shiftKey && !event.ctrlKey) {
 		event.preventDefault()
 		const body = input.value
 		send(input.value)
 		input.value = ""
 		fixHeight()
+		return
 	}
 })
 
 input.addEventListener("input", () => {
 	fixHeight()
+	// set typing
+	if (input.value) {
+		typingManager.update(store.activeRoom.value().id)
+	} else {
+		typingManager.update(null)
+	}
 })
 
 function fixHeight() {
diff --git a/src/js/store/subscribe_value.js b/src/js/store/subscribe_value.js
index eaa2cdd..9c71959 100644
--- a/src/js/store/subscribe_value.js
+++ b/src/js/store/subscribe_value.js
@@ -30,7 +30,7 @@ class SubscribeValue extends Subscribable {
 
 	edit(f) {
 		if (this.exists()) {
-			f(this.data)
+			this.data = f(this.data)
 			this.set(this.data)
 		} else {
 			throw new Error("Tried to edit a SubscribeValue that had no value")
diff --git a/src/js/typing.js b/src/js/typing.js
index 46990d6..b6208ef 100644
--- a/src/js/typing.js
+++ b/src/js/typing.js
@@ -1,5 +1,6 @@
 const {ElemJS, ejs, q} = require("./basic")
 const {store} = require("./store/store")
+const lsm = require("./lsm")
 
 /**
  * Maximum number of typing users to display all names for.
@@ -26,6 +27,7 @@ class Typing extends ElemJS {
 	changeRoom() {
 		if (this.typingUnsubscribe) {
 			this.typingUnsubscribe()
+			this.typingUnsubscribe = null
 		}
 		if (!store.activeRoom.exists()) return
 		const room = store.activeRoom.value()
@@ -36,8 +38,11 @@ class Typing extends ElemJS {
 	render() {
 		if (!store.activeRoom.exists()) return
 		const room = store.activeRoom.value()
-		const users = room.timeline.typing.value()
+		let users = [...room.timeline.typing.value()]
+		// don't show own typing status
+		users = users.filter(u => u !== lsm.get("mx_user_id"))
 		if (users.length === 0) {
+			// nobody is typing
 			this.removeClass("c-typing--typing")
 		} else {
 			let message = ""
diff --git a/src/sass/components/messages.sass b/src/sass/components/messages.sass
index 30ab3f2..170ae71 100644
--- a/src/sass/components/messages.sass
+++ b/src/sass/components/messages.sass
@@ -92,6 +92,7 @@
     background-color: c.$darkest
     padding: 8px
     border: 1px solid c.$divider
+    white-space: pre-wrap
 
   code
     background-color: c.$darker