Command framework

lib/commands/index.ts

@@ -0,0 +1,31 @@
+import { printSyntax, commandList } from "./definitions";
+
+//const commandList = ["about", "navigate", "external", "help", "ed", "nano"];
+
+export function commandCompletion(input: string): string[] {
+    if (input === "") return [];
+    const candidates = commandList.filter(cmd => cmd.name.substring(0, input.length) === input).map(cmd => cmd.name);
+    return candidates;
+}
+
+export function executeCommand(command: string): string[] {
+    if (!command) return [`$ ${command}`].concat(illegalCommand(command));
+    const args = command.split(" ");
+    const cmd = commandList.find(cmd => cmd.name === args[0]);
+    if (!cmd) return [`$ ${command}`].concat(illegalCommand(command));
+
+    const parsed = seperateFlags(args.splice(1));
+    const result = parsed.flags.includes("--help") ? printSyntax(cmd) : cmd.execute(parsed.flags, parsed.subcmds, command);
+
+    return [`$ ${command}`].concat(result);
+}
+
+function seperateFlags(args: string[]): {flags: string[], subcmds: string[]} {
+    const flags = args.filter(arg => arg.substring(0,1) === "-");
+    const subcmds = args.filter(arg => arg.substring(0,1) !== "-");
+    return {flags, subcmds};
+}
+
+function illegalCommand(command: string): string[] {
+    return [`Command '${command}' not found.`, "Type 'help' for help."];
+}