Fix stuff, help command

components/REPL/REPLHistory.tsx

@@ -11,7 +11,7 @@ const REPLHistory: NextPage<REPLHistoryParams> = ({history, inputRef}) => {
     const focusInput = () => {if (inputRef.current) inputRef.current.focus();};
 
     return <div className={styles.container} onClick={focusInput}>
-        { history.map((value, idx) => <div className={styles.line} key={idx}>{value === "" ? "\u00A0" : value}</div>) }
+        { history.map((value, idx) => <pre className={styles.line} key={idx}>{value === "" ? "\u00A0" : value}</pre>) }
     </div>;
 };
 

components/REPL/REPLInput.tsx

@@ -15,19 +15,34 @@ const REPLInput: NextPage<REPLInputParams> = ({historyCallback, inputRef}) => {
     const [justTabbed, setJustTabbed] = React.useState<number>(0);
 
     const replinOnChange = (e: React.FormEvent<HTMLInputElement>) => {
-        const currentInput = (e.target as HTMLInputElement).value.toLowerCase();
-        (e.target as HTMLInputElement).value = currentInput;
+        const input = (e.target as HTMLInputElement);
+        const currentInput = input.value.toLowerCase();
+        // Force lowercase
+        input.value = currentInput;
+
+        if (currentInput.includes(" ")) {
+            // Command already typed
+            input.maxLength = 524288; // Default value
+            if (typed.current) typed.current.innerHTML = "";
+            if (completion.current) completion.current.innerHTML = "";
+            setCurrentCmd([]);
+            return;
+        } else {
+            input.maxLength = 20;
+            // Get completion hint
             const suggest = commandCompletion(currentInput);
             setCurrentCmd(suggest);
             if (suggest.length === 0) suggest.push("");
             if (typed.current) typed.current.innerHTML = currentInput;
             if (completion.current) completion.current.innerHTML = suggest[0].substring(currentInput.length);
+        }        
     };
 
     const tabComplete = (e: React.KeyboardEvent<HTMLInputElement>) => {
+        const input = (e.target as HTMLInputElement);
         if (e.key === "Tab" && currentCmd.length !== 0) {
             e.preventDefault();
-            (e.target as HTMLInputElement).value = currentCmd[justTabbed % currentCmd.length];
+            input.value = currentCmd[justTabbed % currentCmd.length];
             if(typed.current) typed.current.innerHTML = currentCmd[justTabbed % currentCmd.length];
             if(completion.current) completion.current.innerHTML = "";
             setJustTabbed(justTabbed + 1);
@@ -35,7 +50,7 @@ const REPLInput: NextPage<REPLInputParams> = ({historyCallback, inputRef}) => {
 
         if (e.key === "Enter") {
             const result = executeCommand((e.target as HTMLInputElement).value);
-            (e.target as HTMLInputElement).value = "";
+            input.value = "";
             if(typed.current) typed.current.innerHTML = "";
             if(completion.current) completion.current.innerHTML = "";
             historyCallback(result);
@@ -47,7 +62,7 @@ const REPLInput: NextPage<REPLInputParams> = ({historyCallback, inputRef}) => {
     return <div className={styles.wrapperwrapper}>
         <span className={styles.inputstart}>$&nbsp;</span>
         <div className={styles.wrapper}>
-            <input ref={inputRef as MutableRefObject<HTMLInputElement>} className={styles.in} type={"text"} onChange={replinOnChange} onKeyDown={tabComplete} spellCheck={"false"} autoFocus />
+            <input ref={inputRef as MutableRefObject<HTMLInputElement>} className={styles.in} type={"text"} onChange={replinOnChange} onKeyDown={tabComplete} spellCheck={"false"} autoFocus maxLength={20} />
             <span className={styles.completionWrapper}><span ref={typed} className={styles.typed}></span><span ref={completion} className={styles.completion}></span></span>
         </div>
     </div>;

lib/commands/definitions.ts

@@ -1,4 +1,4 @@
-import type { Command } from "./types";
+import type { Command, Flag } from "./types";
 
 function illegalUse(raw: string, cmd: Command): string[] {
     return [
@@ -31,6 +31,10 @@ function checkSubcmd(subcmds: string[], cmd: Command): boolean {
     return true;
 }
 
+function checkFlagInclude(flagsProvided: string[], flag: Flag): boolean {
+    return flagsProvided.includes(`-${flag.short}`) || flagsProvided.includes(`--${flag.long}`);
+}
+
 export function printSyntax(cmd: Command): string[] {
     let flagsOption = "";
     let flagsDesc = [];
@@ -82,4 +86,31 @@ const about: Command = {
     }
 };
 
-export const commandList = [about];
+const help: Command = {
+    name: "help",
+    desc: "Shows helptext.",
+    flags: [{ long: "more", short: "m", desc: "Show more information." }],
+    execute: (flags, _args, _raw) => {
+        checkFlags(flags, help);
+        if (help.flags && checkFlagInclude(flags, help.flags[0])) {
+            return [
+                "Hello user!",
+                "What you see here should resemble an CLI. If you ever used Linux this should be pretty easy for you.",
+                "Everyone else: Have no fear. It is pretty simple. You just type in commands and the output is shown here or it does something on the webite.",
+                "To find out, which commands are available, you can type just 'help'.",
+                "",
+                "Have fun!"
+            ];
+        } else {
+            const available = ["Available commands:"];
+            commandList.forEach(cmd => available.push(`\t${cmd.name}\t${cmd.desc}`));
+            available.concat([
+                "",
+                "Need more help? Type 'help -m'!"
+            ]);
+            return available;
+        }
+    }
+};
+
+export const commandList = [about, help];

lib/commands/types.tsx

@@ -1,4 +1,4 @@
-interface Flag {
+export interface Flag {
     short: string;
     long: string;
     desc: string;
@@ -15,5 +15,5 @@ export interface Command {
     desc: string;
     flags?: Flag[];
     subcommands?: SubCommand[];
-    execute: (flags: string[], args: string[], raw: string) => string[];
+    execute: (flags: string[], args: string[], raw: string, extra?: any) => string[];
 }

package-lock.json

@@ -6,7 +6,7 @@
     "": {
       "name": "my_website",
       "dependencies": {
-        "next": "^12.0.7",
+        "next": "12.0.7",
         "react": "17.0.2",
         "react-dom": "17.0.2"
       },

pages/index.tsx

@@ -1,13 +1,17 @@
 import type { NextPage } from "next";
+import Head from "next/head";
 import REPL from "../components/REPL";
 import styles from "../styles/Home.module.css";
 
 const Home: NextPage = () => {
-  return (
+  return (<>
+    <Head>
+      <title>c0ntroller.de</title>
+    </Head>
     <div className={styles.container}>
       <REPL />
     </div>
-  );
+  </>);
 };
 
 export default Home;

styles/REPL/REPLHistory.module.css

@@ -9,4 +9,8 @@
 
 .line {
     padding: 3px 0;
+    white-space: pre-wrap;
+    font-family: inherit;
+    display: block;
+    margin: 0;
 }

styles/REPL/REPLInput.module.css

@@ -53,13 +53,17 @@
 .completionWrapper span {
     padding: 0;
     margin: 0;
-    display: inline-block;
+    display: flex;
+    flex-direction: column;
 }
 
 .typed {
     opacity: 0;
+    flex-shrink: 1;
+    overflow-x: hidden;
 }
 
 .completion {
     color: var(--repl-color-hint);
+    flex-grow: 1;
 }