From 7ccb07ffc3c419adab4a080bdbab03396603dfa0 Mon Sep 17 00:00:00 2001
From: Thomas Mathews <thomas.c.mathews@gmail.com>
Date: Mon, 16 Jan 2023 19:52:41 -0800
Subject: [PATCH] Added support for rendering mentions.

---
 js/event.js     | 10 ++++++++--
 js/main.js      |  1 +
 js/ui/fmt.js    | 45 +++++++++++++++++++++++++++++++++++++++++++--
 js/ui/render.js | 15 +++++++--------
 js/ui/state.js  | 10 ++++++++++
 5 files changed, 69 insertions(+), 12 deletions(-)

diff --git a/js/event.js b/js/event.js
index 386edc5..e682630 100644
--- a/js/event.js
+++ b/js/event.js
@@ -25,8 +25,8 @@ function event_tags_pubkey(ev, pubkey) {
 	return false
 }
 
-function event_get_pubkeys(ev) {
-	const keys = [ev.pubkey];
+function event_get_tagged_pubkeys(ev) {
+	const keys = [];
 	for (const tag of ev.tags) {
 		if (tag.length >= 2 && tag[0] == "p")
 			keys.push(tag[1]);
@@ -34,6 +34,12 @@ function event_get_pubkeys(ev) {
 	return keys;
 }
 
+function event_get_pubkeys(ev) {
+	const keys = event_get_tagged_pubkeys(ev);
+	keys.splice(0, 0, ev.pubkey);
+	return keys;
+}
+
 function event_calculate_pow(ev) {
 	const id_bits = leading_zero_bits(ev.id)
 	for (const tag of ev.tags) {
diff --git a/js/main.js b/js/main.js
index bdc1bc9..e197f31 100644
--- a/js/main.js
+++ b/js/main.js
@@ -72,6 +72,7 @@ async function webapp_init() {
 
 	// WARNING Order Matters!
 	init_message_textareas();
+	init_timeline(model);
 	init_my_pfp(model);
 	init_postbox(model);
 	init_profile();
diff --git a/js/ui/fmt.js b/js/ui/fmt.js
index 4928e1e..9689400 100644
--- a/js/ui/fmt.js
+++ b/js/ui/fmt.js
@@ -24,7 +24,7 @@ function linkify(text="", show_media=false) {
 	})
 }
 
-function format_content(ev, show_media) {
+function format_content(model, ev, show_media) {
 	if (ev.kind === KIND_REACTION) {
 		if (ev.content === "" || ev.content === "+")
 			return "❤️"
@@ -32,7 +32,8 @@ function format_content(ev, show_media) {
 	}
 	const content = (ev.kind == KIND_DM ? ev.decrypted || ev.content : ev.content)
 		.trim();
-	const body = fmt_body(content, show_media);
+	const body = fmt_mentions(model, fmt_body(content, show_media), 
+		event_get_tagged_pubkeys(ev));
 	let cw = get_content_warning(ev.tags)
 	if (cw !== null) {
 		let cwHTML = "Content Warning"
@@ -50,6 +51,46 @@ function format_content(ev, show_media) {
 	return body;
 }
 
+function fmt_mentions(model, str, pubkeys) {
+	var buf = "";
+	for (var i = 0; i < str.length; i++) {
+		let c = str.charAt(i);
+		let peek = str.charAt(i+1);
+		if (!(c == "#" && peek == "[")) {
+			buf += c;
+			continue;
+		}
+		const start = i;
+		i += 2;
+		let x = "";
+		for(;;) {
+			c = str.charAt(i);
+			if (c >= '0' && c <= '9') {
+				x += c;
+				i++;
+			} else if (c == ']') {
+				break;	
+			} else {
+				buf += x;
+				x = "";
+				break;
+			}
+		}
+		if (x == "")
+			continue;
+		// Specification says it's 0-based, but everyone is doing 1-base
+		let pubkey = pubkeys[parseInt(x)];
+		if (!pubkey) {
+			buf += "(Invalid User Mentioned)"
+			continue;
+		}
+		let profile = model_get_profile(model, pubkey);
+		buf += `<span class="username clickable" data-pubkey="${pubkey}">
+			${fmt_name(profile)}</span>`;
+	}
+	return buf;
+}
+
 /* fmt_body will parse images, blockquotes, and sanitize the content.
  */
 function fmt_body(content, show_media) {
diff --git a/js/ui/render.js b/js/ui/render.js
index 2e73c58..169749d 100644
--- a/js/ui/render.js
+++ b/js/ui/render.js
@@ -94,7 +94,7 @@ function render_dm(model, ev, opts) {
 	return html`<div id="ev${ev.id}" class="${classes}">
 		<div class="wrap">
 			<div class="body">
-			<p>$${format_content(ev, show_media)}</p>
+			<p>$${format_content(model, ev, show_media)}</p>
 			</div>
 			<div class="timestamp" data-timestamp="${ev.created_at}">${delta}</div>
 		</div>
@@ -109,7 +109,7 @@ function event_shows_media(model, ev, mode) {
 
 function rerender_dm(model, ev, el) {
 	let show_media = event_shows_media(model, ev, model.embeds);
-	find_node(".body > p", el).innerHTML = format_content(ev, show_media);
+	find_node(".body > p", el).innerHTML = format_content(model, ev, show_media);
 }
 
 function render_event_nointeract(model, ev, opts={}) {
@@ -145,7 +145,7 @@ function render_event_body(model, ev, opts) {
 	let str = "<div>";
 	str += shared ? render_shared_by(ev, opts) : render_replying_to(model, ev);
 	str += `</div><p>
-	${format_content(ev, show_media)}
+	${format_content(model, ev, show_media)}
 	</p>`;
 	str += render_reactions(model, ev);
 	str += opts.nobar || ev.kind == KIND_DM ? "" : 
@@ -258,8 +258,7 @@ function render_pubkey(pk) {
 	return fmt_pubkey(pk);
 }
 
-function render_username(pk, profile)
-{
+function render_username(pk, profile) {
 	return (profile && profile.name) || render_pubkey(pk)
 }
 
@@ -269,9 +268,9 @@ function render_mentioned_name(pk, profile) {
 
 function render_name(pk, profile, prefix="") {
 	// Beware of whitespace.
-	return html`<span>${prefix}<span class="username clickable" data-pubkey="${pk}" 
-		onclick="open_profile('${pk}')"
-		> ${fmt_profile_name(profile, fmt_pubkey(pk))}</span></span>`
+	return html`<span>${prefix}<span class="username clickable" 
+	role="open-profile" data-pubkey="${pk}"> 
+		${fmt_profile_name(profile, fmt_pubkey(pk))}</span></span>`
 }
 
 function render_profile_img(profile, noclick=false) {
diff --git a/js/ui/state.js b/js/ui/state.js
index f2c5d99..d8f79af 100644
--- a/js/ui/state.js
+++ b/js/ui/state.js
@@ -468,6 +468,16 @@ function html2el(html) {
 	return div.firstChild;
 }
 
+function init_timeline(model) {
+	const el = view_get_timeline_el();
+	el.addEventListener("click", onclick_timeline);
+}
+function onclick_timeline(ev) {
+	if (ev.target.matches(".username[data-pubkey]")) {
+		open_profile(ev.target.dataset.pubkey);
+	}
+}
+
 function init_my_pfp(model) {
 	find_nodes(`img[role='my-pfp']`).forEach((el)=> {
 		el.dataset.pubkey = model.pubkey;