Better caching

src/Utils/__init__.py

@@ -22,7 +22,8 @@ BASEPATH = path.join(str(environ.get("HOME")), '.config/cast')
 DB_FILE_NAME = 'cast.db'
 SUB_TABLE = 'subscriptions'
 VIDEO_TABLE = 'videos'
-USE_CACHED_CATEGORIES = False
+CAT_CACHE = None
+CHAN_CACHE = None
 
 
 def add_video(video_id: str,
@@ -77,27 +78,42 @@ def get_svt_thumb_from_id_changed(id: str,
         size, id, changed)
 
 
-def get_all_svt_categories(basepath=BASEPATH) -> list:
-    global USE_CACHED_CATEGORIES
-    categoryfile = path.join(basepath,"categories.json")
-    if USE_CACHED_CATEGORIES:
-        if path.isfile(categoryfile):
-            with open(categoryfile, 'r') as jfile:
-                return(json.loads(jfile.read()))
-
+def get_all_svt_categories() -> list:
+    global CAT_CACHE
+    if CAT_CACHE:
+        categories = CAT_CACHE
+    else:
+        categories: list = list()
+        url = "https://www.svtplay.se/kategori"
+        data = get_svt_data(url)
+        for entry in data:
+            if 'genres' in entry.keys():
+                categories = entry['genres']
+                break
+        CAT_CACHE = categories
+    return categories
 
 
-    categories: list = list()
-    url = "https://www.svtplay.se/kategori"
+def get_all_svt_channels() -> dict:
+    url = "https://www.svtplay.se/kanaler"
+    result: dict = dict()
     data = get_svt_data(url)
     for entry in data:
-        if 'genres' in entry.keys():
-            categories = entry['genres']
-            break
-    with open(categoryfile, 'w') as jfile:
-        jfile.write(json.dumps(categories))
-    USE_CACHED_CATEGORIES = True
-    return categories
+        if "channels" in entry:
+            for channel in entry["channels"]:
+                if type(entry["channels"][channel]) == type(list()):
+                    for item in entry["channels"][channel]:
+                        if item["__typename"] == "Channel" and "running" in item:
+                            result[item["id"]] = {
+                                "thumbnail":
+                                make_bitmap_from_url(
+                                    get_svt_thumb_from_id_changed(
+                                        item["running"]["image"]['id'],
+                                        item["running"]["image"]['changed'])),
+                                "name":
+                                item["name"]
+                            }
+    return result
 
 
 def get_svt_category(category: str) -> list:
@@ -118,8 +134,8 @@ def get_svt_data(url: str) -> list:
     result: list = list()
     res = requests.get(url)
     soup = BeautifulSoup(res.text, features="lxml")
-    data = json.loads(
-        soup.find(id="__NEXT_DATA__").string)["props"]["urqlState"]
+    data = json.loads(soup.find(
+        id="__NEXT_DATA__").string)["props"]["urqlState"]  # type: ignore
     for key in data.keys():
         result.append(json.loads(data[key]["data"]))
     return result
@@ -232,9 +248,9 @@ def get_svt_thumbnail(link: str) -> str:
     page = requests.get(link)
     soup = BeautifulSoup(page.text, 'html.parser')
     meta = soup.find(property="og:image")
-    image_link = meta["content"]
+    image_link = meta["content"]  #type: ignore
 
-    return image_link
+    return image_link  # type: ignore
 
 
 def get_videos(channel_id: str,
@@ -308,7 +324,9 @@ def make_sized_button(parent_pnl: wx.Panel, bitmap_or_str: Union[wx.Bitmap,
     return btn_sizer
 
 
-def make_bitmap_from_url(logo_url: str, size: wx.Size = SIZE, video_id: str = "") -> wx.Bitmap:
+def make_bitmap_from_url(logo_url: str,
+                         size: wx.Size = SIZE,
+                         video_id: str = "") -> wx.Bitmap:
     if not video_id:
         video_id = hash_string(logo_url)
     thumbpath = path.join(BASEPATH, 'thumbnails')
@@ -344,55 +362,21 @@ def make_bitmap_from_file(path, size: wx.Size = SIZE) -> wx.Bitmap:
 
 
 def resolve_svt_channel(svt_id: str, path: str = '/usr/share/cast') -> dict:
+    global CHAN_CACHE
 
-    channels = {
-        "ch-barnkanalen": {
-            "name":
-            "Barnkanalen",
-            "thumbnail":
-            make_bitmap_from_file('{}/assets/Barnkanalen.png'.format(path))
-        },
-        "ch-svt1": {
-            "name": "SVT 1",
-            "thumbnail":
-            make_bitmap_from_file('{}/assets/SVT1.png'.format(path))
-        },
-        "ch-svt2": {
-            "name": "SVT 2",
-            "thumbnail":
-            make_bitmap_from_file('{}/assets/SVT2.png'.format(path))
-        },
-        "ch-svt24": {
-            "name": "SVT 24",
-            "thumbnail":
-            make_bitmap_from_file('{}/assets/SVT24.png'.format(path))
-        },
-        "ch-kunskapskanalen": {
-            "name":
-            "Kunskapskanalen",
-            "thumbnail":
-            make_bitmap_from_file('{}/assets/Kunskapskanalen.png'.format(path))
-        },
-        "feed": {
+    if CHAN_CACHE:
+        channels = CHAN_CACHE
+    else:
+        channels = get_all_svt_channels()
+        channels["feed"] = {
             "name": "Senaste program",
             "thumbnail":
             make_bitmap_from_file('{}/assets/SVT.png'.format(path))
-        },
-        "allprograms": {
+        }
+        channels["allprograms"] = {
             "name": "Alla program",
             "thumbnail":
             make_bitmap_from_file('{}/assets/SVT.png'.format(path))
-        },
-    }
-
-    for category in get_all_svt_categories():
-        channels[category['id']] = {
-            "name":
-            category["name"],
-            "thumbnail":
-            make_bitmap_from_url(
-                get_svt_thumb_from_id_changed(category['image']['id'],
-                                              category['image']['changed']))
         }
 
     return channels[svt_id]