Starter code for chapter 7, infinite scroll.

tsanghan · Sep 21, 2021 · f2b32b9 · f2b32b9
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diff --git a/code/ch7_infinite_scroll/ch7_final_video_collector/.idea/.name b/code/ch7_infinite_scroll/ch7_final_video_collector/.idea/.name
diff --git a/code/ch7_infinite_scroll/ch7_final_video_collector/app.py b/code/ch7_infinite_scroll/ch7_final_video_collector/app.py
@@ -0,0 +1,55 @@
+import sys
+
+import flask
+import jinja_partials
+
+from services import video_service
+
+app = flask.Flask("app")
+
+
+def configure():
+    print("Configuring Flask app:")
+
+    register_template_ops()
+    print("Registered template helpers")
+
+    register_blueprints()
+    print("Registered blueprints")
+
+    setup_db()
+    print("DB setup completed.")
+    print("", flush=True)
+
+
+def register_template_ops():
+    jinja_partials.register_extensions(app)
+    helpers = {
+        'len': len,
+        'isinstance': isinstance,
+        'str': str,
+        'type': type
+    }
+    app.jinja_env.globals.update(**helpers)
+
+
+def register_blueprints():
+    from views import home
+    from views import videos
+    from views import feed
+
+    app.register_blueprint(home.blueprint)
+    app.register_blueprint(videos.blueprint)
+    app.register_blueprint(feed.blueprint)
+
+
+def setup_db():
+    video_service.load_data()
+
+
+if __name__ == '__main__':
+    configure()
+    being_debugged = sys.gettrace() is not None
+    app.run(debug=being_debugged)
+else:
+    configure()
diff --git a/code/ch7_infinite_scroll/ch7_final_video_collector/db/videos.json b/code/ch7_infinite_scroll/ch7_final_video_collector/db/videos.json
@@ -0,0 +1,256 @@
+[
+  {
+    "category": "Python",
+    "image": "python.jpg",
+    "videos": [
+      {
+        "id": "rDYKZG6Fn8o",
+        "title": "Go Python, Go!",
+        "url": "https://www.youtube.com/watch?v=rDYKZG6Fn8o",
+        "author": "Python Bytes",
+        "views": 347
+      },
+      {
+        "id": "QltSJUlHbpw",
+        "title": "A Space Filled Episode with Dr. Becky",
+        "url": "https://www.youtube.com/watch?v=QltSJUlHbpw",
+        "author": "Python Bytes",
+        "views": 365
+      },
+      {
+        "id": "4wjqsPtj2QY",
+        "title": "HTMX - Clean Dynamic HTML Pages",
+        "url": "https://www.youtube.com/watch?v=4wjqsPtj2QY",
+        "author": "Talk Python",
+        "views": 756
+      },
+      {
+        "id": "cfrUF-UGehk",
+        "title": "Python and Flask at the US Federal Election Commission",
+        "url": "https://www.youtube.com/watch?v=cfrUF-UGehk",
+        "author": "Talk Python",
+        "views": 511
+      },
+      {
+        "id": "36yw8VC3KU8",
+        "title": "PyCon: Let's talk Databases in Python: SQLAlchemy and Alembic",
+        "url": "https://www.youtube.com/watch?v=36yw8VC3KU8",
+        "author": "Hannah Stepanek",
+        "views": 10302
+      },
+      {
+        "id": "pvaIi0l1GME",
+        "title": "What we learned from Papermill to operationalize notebooks",
+        "url": "https://www.youtube.com/watch?v=pvaIi0l1GME",
+        "author": "Alan Yu and Vasu Bhog",
+        "views": 789
+      },
+      {
+        "id": "PnxlHfGdihI",
+        "title": "A Python Developer Explores Apple's M1",
+        "url": "https://www.youtube.com/watch?v=PnxlHfGdihI",
+        "author": "Michael Kennedy",
+        "views": 4654
+      }
+    ]
+  },
+  {
+    "category": "Apple",
+    "image": "apple.jpg",
+    "videos": [
+      {
+        "id": "R5BQ6yhhRJc",
+        "title": "Andy's Pick & Pull - WWDC 2021",
+        "url": "https://www.youtube.com/watch?v=R5BQ6yhhRJc",
+        "author": "MacBreak Weekly",
+        "views": 13720
+      },
+      {
+        "id": "PnxlHfGdihI",
+        "title": "A Python Developer Explores Apple's M1",
+        "url": "https://www.youtube.com/watch?v=PnxlHfGdihI",
+        "author": "Michael Kennedy",
+        "views": 4654
+      },
+      {
+        "id": "YisUywtzZK0",
+        "title": "How Apple Private Relay Kills Data Profiling",
+        "url": "https://www.youtube.com/watch?v=YisUywtzZK0",
+        "author": "Rene Ritchie",
+        "views": 65245
+      },
+      {
+        "id": "vg0AF166eVI",
+        "title": "Why the M1 Mac is SO FAST — Apple Silicon Explained!",
+        "url": "https://www.youtube.com/watch?v=vg0AF166eVI",
+        "author": "Rene Ritchie",
+        "views": 523014
+      },
+      {
+        "id": "0TD96VTf0Xs",
+        "title": "WWDC 2021",
+        "url": "https://www.youtube.com/watch?v=0TD96VTf0Xs",
+        "author": "Apple",
+        "views": 6655103
+      },
+      {
+        "id": "4ecN7yGcqcQ",
+        "title": "M1 iMac Unboxing and Review!",
+        "url": "https://www.youtube.com/watch?v=4ecN7yGcqcQ",
+        "author": "iJustine",
+        "views": 623042
+      }
+    ]
+  },
+  {
+    "category": "JavaScript",
+    "image": "javascript.jpg",
+    "videos": [
+      {
+        "id": "4wjqsPtj2QY",
+        "title": "HTMX - Clean Dynamic HTML Pages",
+        "url": "https://www.youtube.com/watch?v=4wjqsPtj2QY",
+        "author": "Talk Python",
+        "views": 756
+      },
+      {
+        "id": "qZXt1Aom3Cs",
+        "title": "Vue JS Crash Course 2021",
+        "url": "https://www.youtube.com/watch?v=qZXt1Aom3Cs",
+        "author": "Traversy Media",
+        "views": 265783
+      },
+      {
+        "id": "OrxmtDw4pVI",
+        "title": "Vue.js: The Documentary",
+        "url": "https://www.youtube.com/watch?v=OrxmtDw4pVI",
+        "author": "Honeypot",
+        "views": 932606
+      },
+      {
+        "id": "m_F8wSZT3QY",
+        "title": "Wat - JavaScript misadventures",
+        "url": "https://www.youtube.com/watch?v=3se2-thqf-A",
+        "author": "Gary Bernhardt",
+        "views": 866
+      },
+      {
+        "id": "ahCwqrYpIuM",
+        "title": "TypeScript - The Basics",
+        "url": "https://www.youtube.com/watch?v=ahCwqrYpIuM",
+        "author": "Fireship",
+        "views": 772764
+      }
+    ]
+  },
+  {
+    "category": "EVs",
+    "image": "ev.jpg",
+    "videos": [
+      {
+        "id": "6RhtiPefVzM",
+        "title": "Are Electric Cars Worse For The Environment? Myth Busted",
+        "url": "https://www.youtube.com/watch?v=6RhtiPefVzM",
+        "author": "Engineering Explained",
+        "views": 1753659
+      },
+      {
+        "id": "QMfxJEfb4lw",
+        "title": "Rivian - Electric Adventure Vehicle",
+        "url": "https://www.youtube.com/watch?v=QMfxJEfb4lw",
+        "author": "Fully Charged Show",
+        "views": 4029696
+      },
+      {
+        "id": "A6RsmzCYB3I",
+        "title": "New Hyundai Ioniq 5 full review - the 300-mile Tesla EV rival styled by Minecraft",
+        "url": "https://www.youtube.com/watch?v=A6RsmzCYB3I",
+        "author": "The Late Brake Show",
+        "views": 938994
+      },
+      {
+        "id": "QHOPFp1o3d0",
+        "title": "Bolt: Best Non Tesla Electric Car?",
+        "url": "https://www.youtube.com/watch?v=QHOPFp1o3d0",
+        "author": "TheStraightPipes",
+        "views": 512330
+      },
+      {
+        "id": "3iRHYIwjFKw",
+        "title": "Tesla Full Self Driving Beta Test Drive",
+        "url": "https://www.youtube.com/watch?v=3iRHYIwjFKw",
+        "author": "Tesla Raj",
+        "views": 367345
+      },
+      {
+        "id": "KOWz9-5T9pE",
+        "title": "Formula E: 2021 Puebla E-Prix | Round 8",
+        "url": "https://www.youtube.com/watch?v=KOWz9-5T9pE",
+        "author": "ABB Formula E",
+        "views": 43975
+      }
+    ]
+  },
+  {
+    "category": "Racing",
+    "image": "racing.jpg",
+    "videos": [
+      {
+        "id": "tvcuGoVhpxw",
+        "title": "How to Trail Brake: A Step-by-Step Guide",
+        "url": "https://www.youtube.com/watch?v=tvcuGoVhpxw",
+        "author": "Driver61",
+        "views": 210861
+      },
+      {
+        "id": "eUdaWbr1KB4",
+        "title": "Trail Braking: 5 Mistakes DESTROYING Your Lap Time",
+        "url": "https://www.youtube.com/watch?v=eUdaWbr1KB4",
+        "author": "Driver61",
+        "views": 581747
+      },
+      {
+        "id": "F5igCWjmeAU",
+        "title": "My Very First Start in IndyCar",
+        "url": "https://www.youtube.com/watch?v=F5igCWjmeAU",
+        "author": "Romain Grosjean",
+        "views": 960145
+      },
+      {
+        "id": "KOWz9-5T9pE",
+        "title": "Formula E: 2021 Puebla E-Prix | Round 8",
+        "url": "https://www.youtube.com/watch?v=KOWz9-5T9pE",
+        "author": "ABB Formula E",
+        "views": 43975
+      },
+      {
+        "id": "EU73gjQJXU4",
+        "title": "IndyCar - Road America 2021 Highlights",
+        "url": "https://www.youtube.com/watch?v=EU73gjQJXU4",
+        "author": "Motorsports on NBC",
+        "views": 43295
+      },
+      {
+        "id": "9i2iA0R6IdA",
+        "title": "The First Corner: Do's and Don'ts",
+        "url": "https://www.youtube.com/watch?v=9i2iA0R6IdA",
+        "author": "Driver61",
+        "views": 46432
+      },
+      {
+        "id": "X0WuN3poyVs",
+        "title": "Biggest Sim Racing Tips (sim driver analysis)",
+        "url": "https://www.youtube.com/watch?v=X0WuN3poyVs",
+        "author": "Driver61",
+        "views": 78817
+      },
+      {
+        "id": "2wzy3HiW7SE",
+        "title": "CAN YOU TELL THIS ISN'T REAL? - Corvette C8.R - Nordschleife",
+        "url": "https://www.youtube.com/watch?v=2wzy3HiW7SE",
+        "author": "Boosted Media",
+        "views": 60007
+      }
+    ]
+  }
+]
diff --git a/code/ch7_infinite_scroll/ch7_final_video_collector/infrastructure/request_dict.py b/code/ch7_infinite_scroll/ch7_final_video_collector/infrastructure/request_dict.py
@@ -0,0 +1,35 @@
+import flask
+from werkzeug.datastructures import MultiDict
+
+
+class RequestDictionary(dict):
+    def __init__(self, *args, default_val=None, **kwargs):
+        self.default_val = default_val
+        super().__init__(*args, **kwargs)
+
+    def __getattr__(self, key):
+        return self.get(key, self.default_val)
+
+
+def create(default_val=None, **route_args) -> RequestDictionary:
+    request = flask.request
+
+    # Adding this retro actively. Some folks are experiencing issues where they
+    # are getting a list rather than plain dict. I think it's from multiple
+    # entries in the multidict. This should fix it.
+    args = request.args
+    if isinstance(request.args, MultiDict):
+        args = request.args.to_dict()
+
+    form = request.form
+    if isinstance(request.args, MultiDict):
+        form = request.form.to_dict()
+
+    data = {
+        **args,  # The key/value pairs in the URL query string
+        **request.headers,  # Header values
+        **form,  # The key/value pairs in the body, from a HTML post form
+        **route_args  # And additional arguments the method access, if they want them merged.
+    }
+
+    return RequestDictionary(data, default_val=default_val)
diff --git a/code/ch7_infinite_scroll/ch7_final_video_collector/infrastructure/view_modifiers.py b/code/ch7_infinite_scroll/ch7_final_video_collector/infrastructure/view_modifiers.py
@@ -0,0 +1,42 @@
+from functools import wraps
+
+import flask
+import werkzeug
+import werkzeug.wrappers
+
+
+def response(*, mimetype: str = None, template_file: str = None):
+    def response_inner(f):
+
+        @wraps(f)
+        def view_method(*args, **kwargs):
+            response_val = f(*args, **kwargs)
+
+            if isinstance(response_val, werkzeug.wrappers.Response):
+                return response_val
+
+            if isinstance(response_val, flask.Response):
+                return response_val
+
+            if isinstance(response_val, dict):
+                model = dict(response_val)
+            else:
+                model = dict()
+
+            if template_file and not isinstance(response_val, dict):
+                raise Exception(
+                    "Invalid return type {}, we expected a dict as the return value.".format(type(response_val)))
+
+            if template_file:
+                response_val = flask.render_template(template_file, **response_val)
+
+            resp = flask.make_response(response_val)
+            resp.model = model
+            if mimetype:
+                resp.mimetype = mimetype
+
+            return resp
+
+        return view_method
+
+    return response_inner