feat: close #628 add chat commands

app/command.ts

@@ -1,4 +1,5 @@
 import { useSearchParams } from "react-router-dom";
+import Locale from "./locales";
 
 type Command = (param: string) => void;
 interface Commands {
@@ -26,3 +27,45 @@ export function useCommand(commands: Commands = {}) {
     setSearchParams(searchParams);
   }
 }
+
+interface ChatCommands {
+  new?: Command;
+  newm?: Command;
+  next?: Command;
+  prev?: Command;
+  clear?: Command;
+  del?: Command;
+}
+
+export const ChatCommandPrefix = ":";
+
+export function useChatCommand(commands: ChatCommands = {}) {
+  function extract(userInput: string) {
+    return (
+      userInput.startsWith(ChatCommandPrefix) ? userInput.slice(1) : userInput
+    ) as keyof ChatCommands;
+  }
+
+  function search(userInput: string) {
+    const input = extract(userInput);
+    const desc = Locale.Chat.Commands;
+    return Object.keys(commands)
+      .filter((c) => c.startsWith(input))
+      .map((c) => ({
+        title: desc[c as keyof ChatCommands],
+        content: ChatCommandPrefix + c,
+      }));
+  }
+
+  function match(userInput: string) {
+    const command = extract(userInput);
+    const matched = typeof commands[command] === "function";
+
+    return {
+      matched,
+      invoke: () => matched && commands[command]!(userInput),
+    };
+  }
+
+  return { match, search };
+}