Implement fetching categories, feeds and unread counts and displaying them in the left pane

.gitignore

@@ -1,2 +1,4 @@
 venv/
 .env
+config.yml
+__pycache__

API.py

@@ -0,0 +1,24 @@
+import requests
+
+
+class Fetcher:
+    def __init__(self, URL, token):
+        self.URL = URL
+        self.token = token
+        self.headers = {"Authorization": "GoogleLogin auth="+token}
+        self.getUnreadCounts()
+        self.getSubscriptions()
+
+    def getUnreadCounts(self):
+        response = requests.get(self.URL+"/reader/api/0/unread-count?output=json", headers=self.headers)
+        result = dict([(item["id"], (item["count"], item["newestItemTimestampUsec"])) for item in response.json()["unreadcounts"]])
+        self.unreadCounts = result
+        self.categories = [{"id": item, "name": item[13:], "count": self.unreadCounts[item][0]}
+                           for item in self.unreadCounts.keys() if item[0:13] == "user/-/label/"]
+
+    def getSubscriptions(self):
+        response = requests.get(self.URL+"/reader/api/0/subscription/list?output=json", headers=self.headers)
+        self.feeds = response.json()["subscriptions"]
+
+    def feedsFromCategory(self, category):
+        return [item for item in self.feeds if item["categories"][0]["id"] == category]

App.py

@@ -1,5 +1,53 @@
 import urwid
+import yaml
 from concurrent.futures import ThreadPoolExecutor
+from API import Fetcher
+
+
+class LeftPane(urwid.ListBox):
+    def __init__(self, categories):
+        super().__init__(self)
+        items = [urwid.AttrMap(urwid.Columns([(5, urwid.Text(str(category["count"]))), urwid.Text(category["name"])]),
+                               category["id"], "reveal focus") for category in categories]
+        walker = urwid.SimpleListWalker(items)
+        self.body = walker
+        self.categoryPosition = 0
+
+    def keypress(self, size, key):
+        if key in ("j", "down"):
+            item_size = len(self.body)
+            focus_widget, idx = self.get_focus()
+            if idx < item_size - 1:
+                idx = idx + 1
+                self.set_focus(idx)
+            return
+        elif key in ("k", "up"):
+            focus_widget, idx = self.get_focus()
+            if idx > 0:
+                idx = idx - 1
+                self.set_focus(idx)
+            return
+        elif key in ("l", "right"):
+            focus_widget, idx = self.get_focus()
+            self.categoryPosition = idx
+            itemId = focus_widget.attr_map[None]
+            feeds = tui.fetcher.feedsFromCategory(itemId)
+            feedItems = [urwid.AttrMap(urwid.Columns([(5, urwid.Text(str(tui.fetcher.unreadCounts[feed["id"]][0]))),
+                                       urwid.Text(feed["title"])]), feed["id"], "reveal focus") for feed in feeds]
+            walker = urwid.SimpleListWalker(feedItems)
+            self.body = walker
+            tui.leftBox.set_title(itemId[13:])
+            return
+        elif key in ("h", "left"):
+            items = [urwid.AttrMap(urwid.Columns([(5, urwid.Text(str(category["count"]))), urwid.Text(category["name"])]),
+                                   category["id"], "reveal focus") for category in tui.fetcher.categories]
+            walker = urwid.SimpleFocusListWalker(items)
+            self.body = walker
+            tui.leftBox.set_title("Categories")
+            tui.feeds.set_focus(self.categoryPosition)
+            return
+
+        return super().keypress(size, key)
 
 
 class Items(urwid.ListBox):
@@ -61,18 +109,19 @@ class TUI(urwid.Frame):
 
     def __init__(self):
 
+        with open('config.yml', 'r') as file:
+            config = yaml.safe_load(file)
+            URL = config["server"]["URL"]
+            token = config["server"]["token"]
+
+        self.fetcher = Fetcher(URL, token)
+
         self.leftPaneItems = {}
         self.activePane = False
-        for i in range(0, 15):
-            self.leftPaneItems["Category# " + str(i)] = {"count": str(i),
-                                                         "feeds": [{"count": str(k), "name": "Feed# " + str(k)} for k in range(0, 10)]}
-
         self.executor = ThreadPoolExecutor(max_workers=1)
         self.loop = None
-        self.feedItems = [urwid.Columns([(4, urwid.Text(self.leftPaneItems[item]["count"])), urwid.Text(item)])
-                          for item in self.leftPaneItems.keys()]
         self.articleItems = [urwid.Text("Article# " + str(i)) for i in range(0, 10)]
-        self.feeds = Items(self.feedItems)
+        self.feeds = LeftPane(self.fetcher.categories)
         self.articles = Items(self.articleItems)
         self.leftBox = urwid.LineBox(self.feeds, title="Categories")
         self.container = urwid.Columns(

app.css

@@ -1,37 +0,0 @@
-#app-grid {
-    layout: grid;
-    grid-size: 2;
-    grid-columns: 1fr 2fr;
-    grid-rows: 1fr;
-}
-
-#left-container > Static {
-    background: $boost;
-    margin-bottom: 1;
-}
-
-#feed-active {
-    color: blue;
-    border: dodgerblue;
-}
-
-#feed-nonactive {
-    color: auto;
-}
-
-#feed-pane {
-    row-span: 1;
-    background: $panel;
-    border: dodgerblue;
-}
-
-#right-pane {
-    background: $panel;
-    border: dodgerblue;
-}
-
-#right-pane > Static {
-    margin-bottom: 1;
-    background: $boost;
-}
-