[O] Create separate class for scheduler

src/scheduler.py

@@ -0,0 +1,63 @@
+import difflib
+from datetime import datetime
+from io import BytesIO
+
+from telegram.ext import Job, CallbackContext, Updater
+
+from src.commands import sendRequest
+from src.database import Database
+from src.utils import wrap, render
+
+
+class Scheduler:
+    tasks: {str: {str: Job}} = {}
+    cache: {str: {str: str}} = {}
+
+    def __init__(self, database: Database, updater: Updater):
+        self.database = database
+        self.updater = updater
+
+    def create(self, user: str, taskName: str, request):
+        if user not in self.cache:
+            self.cache[user] = {}
+
+        def task(context: CallbackContext):
+            # Send request
+            text = wrap(sendRequest(request))
+
+            # First time http request
+            if taskName not in self.cache[user]:
+                self.cache[user][taskName] = text
+
+            # Compare diff
+            else:
+                # Generate diff
+                diffRaw = difflib.unified_diff(self.cache[user][taskName].splitlines(1), text.splitlines(1),
+                                               fromfile='before', tofile='after')
+                diff = ''.join(diffRaw)
+                self.cache[user][taskName] = text
+
+                if diff != '':
+                    # Render diff
+                    doc = BytesIO(render(diff))
+                    time = datetime.now().strftime('%b %d %Y %H-%M-%S')
+                    fileName = 'diff %s %s.png' % (taskName, time)
+                    caption = '*%s Changed!*' % taskName
+
+                    # Send as file
+                    context.bot.send_document(int(user), doc, fileName, caption, parse_mode='markdown')
+
+        return task
+
+    def startTask(self, user: str, request):
+        name = request['name']
+        if user not in self.tasks:
+            self.tasks[user] = {}
+
+        self.tasks[user][name] = self.updater.job_queue.run_repeating(self.create(user, name, request), interval=request.get('interval', 120), first=0)
+
+        # Keep record
+        if not request['enabled']:
+            request['enabled'] = True
+            self.database.save()
+