Add support for parsing tasks from directory

src/notepad/index.ts

@@ -0,0 +1,47 @@
+import fs from "fs";
+import readline from "readline";
+import { Task } from "../types/task";
+import { parse } from "../parser";
+
+export async function readTasksFromDirectory(directory: string): Promise<Task[]> {
+  return walk(directory, readTasksFromFile);
+}
+
+export async function walk<T>(directory: string, visitor: (path: string) => Promise<T[]>): Promise<T[]> {  
+  const list = [];
+
+  for(const file of fs.readdirSync(directory)) {
+    const path = `${directory}/${file}`;  
+
+    if (fs.statSync(path).isDirectory()) {
+      const items = await walk(path, visitor);
+      list.push(...items);
+    } else {
+      const items = await visitor(path);
+      list.push(...items);
+    }
+  }
+
+  return list;
+}
+
+export async function readTasksFromFile(path: string): Promise<Task[]> {
+  const fileStream = fs.createReadStream(path);
+
+  const rl = readline.createInterface({
+    input: fileStream,
+    crlfDelay: Infinity
+  });
+
+  const list: Task[] = [];
+  
+  for await (const line of rl) {
+    const task = parse(line);
+    
+    if(task) {
+      list.push(task);
+    }
+  }
+
+  return list;
+}