user_status: Add get_emoji_info function.

This is a prep commit to add the status emoji feature.

This function will add missing/extra parameters to the
emoji info object, that would need by the template to
render an emoji.

Co-authored-by: Yash Rathore <33805964+YashRE42@users.noreply.github.com>

static/js/user_status.js

@@ -1,5 +1,8 @@
+import * as emoji from "../shared/js/emoji";
+
 import * as blueslip from "./blueslip";
 import * as channel from "./channel";
+import {page_params} from "./page_params";
 
 const away_user_ids = new Set();
 const user_info = new Map();
@@ -42,6 +45,44 @@ export function revoke_away(user_id) {
     away_user_ids.delete(user_id);
 }
 
+// This function will add missing/extra parameters to the emoji info object,
+// that would need by template to render an emoji.
+export function get_emoji_info(emoji_info) {
+    // To call this function you must pass at least an emoji name.
+    if (!emoji_info || !emoji_info.emoji_name) {
+        return {};
+    }
+
+    const status_emoji_info = {...emoji_info};
+
+    status_emoji_info.emoji_alt_code = page_params.emojiset === "text";
+    if (status_emoji_info.emoji_alt_code) {
+        return status_emoji_info;
+    }
+
+    if (emoji.active_realm_emojis.has(emoji_info.emoji_name)) {
+        if (!emoji_info.reaction_type) {
+            if (emoji_info.emoji_name === "zulip") {
+                status_emoji_info.reaction_type = "zulip_extra_emoji";
+            } else {
+                status_emoji_info.reaction_type = "realm_emoji";
+            }
+        }
+        const more_emoji_info = emoji.active_realm_emojis.get(emoji_info.emoji_name);
+        status_emoji_info.emoji_code = emoji_info.emoji_code || more_emoji_info.id;
+        status_emoji_info.url = more_emoji_info.emoji_url;
+    } else {
+        const codepoint = emoji.get_emoji_codepoint(emoji_info.emoji_name);
+        if (codepoint === undefined) {
+            blueslip.warn("Bad emoji name: " + emoji_info.emoji_name);
+            return {};
+        }
+        status_emoji_info.reaction_type = emoji_info.reaction_type || "unicode_emoji";
+        status_emoji_info.emoji_code = emoji_info.emoji_code || codepoint;
+    }
+    return status_emoji_info;
+}
+
 export function is_away(user_id) {
     return away_user_ids.has(user_id);
 }