Added working WTForm to get URL at /downloader

app.py

@@ -1,8 +1,10 @@
 from flask import Flask, current_app, g
 from flask_bootstrap import Bootstrap
+from flask_wtf.csrf import CSRFProtect
 
 from frontend import frontend, get_db
 from nav import nav
+from os import urandom
 
 
 def init_db():
@@ -17,6 +19,9 @@ def create_app():
     Bootstrap(app)
 
     app.config['BOOTSTRAP_SERVE_LOCAL'] = True
+    app.config['SECRET_KEY'] = urandom(32)
+    CSRFProtect(app)
+
     app.register_blueprint(frontend)
     app.app_context().push()
     nav.init_app(app)

forms/download.py

@@ -0,0 +1,7 @@
+from flask_wtf import FlaskForm
+from wtforms import URLField
+from wtforms.validators import URL, DataRequired
+
+
+class DownloadForm(FlaskForm):
+    url = URLField('url', validators=[DataRequired(), URL()])

frontend.py

@@ -3,7 +3,9 @@ from flask_nav3.elements import Navbar, View
 import sqlite3
 import os
 
+import forms.download
 from nav import nav
+from forms.download import DownloadForm
 
 frontend = Blueprint('frontend', __name__)
 
@@ -23,16 +25,22 @@ def index():
 
 @frontend.route('/downloader', methods=['GET', 'POST'])
 def downloader():
-    if request.method == 'GET':
-        return render_template('downloader.html')
-    else:
-        return 'Hello there!'
+    form = DownloadForm()
+    if form.validate_on_submit():
+        # put here the interaction with youtube-dl
+        # or forward to site that shows details of yt link
+        url = form.url.data
+        return f"Hello There {url}"
+
+    return render_template('downloader.html', form=form)
 
 
 @frontend.route('/download/<path:file>', methods=['GET'])
 def download(file):
-    dir = os.path.join(current_app.root_path, 'downloads/')
-    return send_from_directory(dir, )
+    return send_from_directory(
+        os.path.join(current_app.root_path, 'downloads/'),
+        file
+    )
 
 
 @frontend.route('/update', methods=['GET', 'POST'])
@@ -51,7 +59,7 @@ def library():
 def collection():
     query = query_db("""
             SELECT video.name FROM video
-            INNER JOIN collection ON collection.path = video.path
+            INNER JOIN collection ON collection.path = video.filename
             INNER JOIN playlist ON playlist.ROWID = collection.playlist
             WHERE video.name IS ?;
             """, ("",))

templates/downloader.html

@@ -1,17 +1,15 @@
 {%- extends "base.html" %}
 
-{% import "bootstrap/utils.html" as utils %}
-
 {% block content %}
     <div class="container">
-        {%- with messages = get_flashed_messages(with_categories=True)  %}
-            {%- if messages %}
-                <div class="row">
-                    <div class="col-md-12">
-                        {{utils.flashed_messages(messages)}}
-                    </div>
-                </div>
-            {%- endif  %}
-        {%- endwith  %}
+        <form method="POST">
+            {{ form.csrf_token }}
+            <label for="url">Video, Channel or Playlist</label> <br>
+            <input id="url" name="url" required type="url" placeholder="YouTube Link">
+            <input type="submit" value="Go">
+        </form>
+        {% if form.errors %}
+        {{ form.errors['url'][0][:-1] + ', try again.' }}
+        {% endif %}
     </div>
 {%- endblock %}