feat: webui

web/assets/index.js

@@ -0,0 +1,123 @@
+const tokenInput = document.querySelector('#token');
+const rememberTokenCheckbox = document.querySelector('#remember-token');
+const setTokenButton = document.querySelector('#set-token');
+const lessonInput = document.querySelector('#lesson-query');
+const getLessonButton = document.querySelector('#get-lesson');
+let token = localStorage.getItem('token') || '';
+
+if (token !== '') {
+    tokenInput.value = token;
+    rememberTokenCheckbox.checked = true;
+    fetch("/api/v1/token", {
+        method: 'POST',
+        body: token,
+    }).then(rsp => {
+        if (rsp.status !== 200) {
+            setTokenButton.innerHTML = `:( (${rsp.status})`;
+        }
+    });
+}
+
+function randomString(length) {
+    return `a${Math.random().toString(36).slice(2, length + 2)}`;
+}
+
+// React simulator
+function getResult(id) {
+    const element = document.createElement("div");
+    element.className = "block";
+    document.body.appendChild(document.createElement("br"));
+    document.body.appendChild(element);
+    return element;
+}
+
+setTokenButton.addEventListener('click', async () => {
+    token = tokenInput.value;
+    const rsp = await fetch("/api/v1/token", {
+        method: 'POST',
+        body: token,
+    });
+    if (rsp.status !== 200) {
+        setTokenButton.innerHTML = `:( (${rsp.status})`;
+        return;
+    }
+    if (rememberTokenCheckbox.checked) {
+        localStorage.setItem('token', token);
+    } else {
+        localStorage.removeItem('token');
+    }
+});
+
+getLessonButton.addEventListener('click', async () => {
+    const input = lessonInput.value;
+    let id = Number.parseInt(input);
+    if (Number.isNaN(id)) {
+        const url = input.split('/');
+        url.pop();
+        id = Number.parseInt(url.pop());
+    }
+    const rsp = await fetch(`/api/v1/lessons/${id}`);
+    const result = getResult("lesson");
+    const data = await rsp.json();
+    const ids = {};
+    // React :nerd:
+    result.innerHTML = "<h2>Lesson Information</h2>\n";
+    result.innerHTML += `Name: ${decodeURIComponent(data.name)}`;
+    result.innerHTML += "<h3>Videos available</h3>";
+    for (const video of data.videos) {
+        const uniqueId = randomString(15);
+        ids[uniqueId] = video;
+        result.innerHTML += `
+        <input type="checkbox" id="${uniqueId}" name="${uniqueId}" value="${uniqueId}">
+        <label for="${uniqueId}">${decodeURIComponent(video.name)}</label>
+        <br>`;
+    }
+    let videoDlResult = null;
+    const downloadSelectedButton = document.createElement("button");
+    downloadSelectedButton.innerHTML = "Download Selected";
+    downloadSelectedButton.addEventListener('click', async () => {
+        for (const [id, video] of Object.entries(ids)) {
+            const checkbox = document.querySelector(`#${id}`);
+            if (!checkbox.checked) {
+                continue;
+            }
+            const videoRsp = await fetch(`/api/v1/videos/${video.id}`);
+            if (videoRsp.status !== 200) {
+                console.error(`Failed to get video ${video.name}`);
+                continue;
+            }
+            const videoData = await videoRsp.json();
+            if (videoDlResult === null) {
+                result.appendChild(document.createElement("br"));
+                result.appendChild(document.createElement("br"));
+                videoDlResult = document.createElement("div");
+                videoDlResult.className = "block";
+                result.appendChild(videoDlResult);
+            }
+            const progressId = randomString(15);
+            const progressStrId = randomString(15);
+            videoDlResult.innerHTML += `<span>${video.name}.mp4 <progress id="${progressId}" value="0" max="100"></progress> <span id="${progressStrId}">0%</span></span>`
+            const rsp = await fetch(`/api/v1/download-video?${new URLSearchParams({
+                url: encodeURIComponent(videoData.m3u8),
+                output: encodeURIComponent(`videos/${video.name}.mp4`),
+            })}`);
+            const reader = rsp.body.getReader();
+            while (true) {
+                // wait for next encoded chunk
+                const { done, value } = await reader.read();
+                 // check if stream is done
+                if (done) break;
+                // Decodes data chunk and yields it
+                const progress = Math.floor(Number.parseFloat(new TextDecoder().decode(value)));
+                document.querySelector(`#${progressId}`).value = progress;
+                document.querySelector(`#${progressStrId}`).innerText = `${progress}%`;
+            }
+            if (rsp.status !== 200) {
+                console.error(`Failed to download ${video.name}`);
+            }
+        }
+    });
+    result.appendChild(downloadSelectedButton);
+    // result.innerHTML += "<button>Download All</button>";
+
+});