chore: added daily question ttl caching and added problem label in mail

Author: Rajat069

requirements.txt

@@ -6,4 +6,5 @@ python-dotenv
 
 rich
 halo
-tqdm
+tqdm
+cachetools

src/core_logic.py

@@ -72,10 +72,10 @@ def run_check():
 
         if solved_today:
             print(f"[ {username} ] has already solved the daily problem.")
-            subject = f"Awesome! You solved today’s LeetCode challenge!"
+            subject = "Awesome! You solved today’s LeetCode challenge!"
         else:
             print(f" [ {username} ] has not solved the daily problem yet sending reminder...")
-            subject = f"⏳ Reminder: Solve Today’s LeetCode Problem!"
+            subject = "⏳ Reminder: Solve Today’s LeetCode Problem!"
 
 
             print(f"Difficulty: {q_details['difficulty']}, AC Rate: {format(float(q_details['acRate']), '.2f')}% ")
@@ -94,10 +94,11 @@ def run_check():
         html = email_service.build_html_email(
             username=username,
             title=q_details['title'],
+            difficulty=q_details['difficulty'], 
             link=q_link,
             solved=solved_today,
             quote=ai_quote,
-            hints=ai_hints 
+            hints=ai_hints,
         )
 
         with Halo(text='Sending mail..', spinner='bouncingBar', color='yellow') as spinner:

src/email_service.py

@@ -33,7 +33,7 @@ def send_email(to_email, subject, html_content):
         return False
 
 
-def build_html_email(username, title, link, solved, quote=None, hints=None):
+def build_html_email(username, title, difficulty, link, solved, quote=None, hints=None):
     """Builds a responsive email with optional AI hints, quotes, and a live countdown GIF."""
 
     if hints is None:
@@ -53,9 +53,20 @@ def build_html_email(username, title, link, solved, quote=None, hints=None):
     else:
         preheader_text = f"Don't forget to solve {title} today!"
         heading = f"Hey <a href='https://leetcode.com/u/{username}' target='_blank' style='text-decoration: none;'>{username}</a>, time to code!"
-        subtext = f"Today's problem, <strong>{title}</strong>, is waiting for you. Don't miss out on your streak!"
         button_text = f"Solve '{title}' Now"
-        button_color = "#000000" 
+        pill_color = {
+            "Easy": "#43AA03",    
+            "Medium": "#FFBB00", 
+            "Hard": "#f8615c"     
+        }[difficulty]
+        difficulty_badge = (
+            f"<span style='display:inline-block; padding:4px 10px; "
+            f"font-size:12px; font-weight:700; color:{pill_color}; border-radius:999px; "
+            f"background:#00000030; line-height:1; vertical-align:middle;'>"
+            f"{difficulty}</span>"
+        )
+        subtext = (f"Today's problem, <strong>{title}</strong> {difficulty_badge}, is waiting for you. "
+               f"Don't miss out on your streak!")
         footer = f"<em>“{quote}”</em>" if quote else "<em>“Small daily improvements lead to big results.” 🌱</em>"
 
         deadline_iso = get_deadline_for_potd()
@@ -160,11 +171,10 @@ def build_html_email(username, title, link, solved, quote=None, hints=None):
                                 <p style="margin: 0 0 30px 0; font-size: 16px; line-height: 1.6;">
                                     {subtext}
                                 </p>
-                                
                                 <table border="0" cellpadding="0" cellspacing="0" width="100%">
                                     <tr>
                                         <td align="center">
-                                            <a href="{link}" target="_blank" class="button-link" style="background-color: {button_color}; color: #ffffff; font-size: 16px; font-weight: bold; text-decoration: none; padding: 14px 22px; border-radius: 5px; display: inline-block;">
+                                            <a href="{link}" target="_blank" class="button-link" style="background-color: #000000; color: #ffffff; font-size: 16px; font-weight: bold; text-decoration: none; padding: 14px 22px; border-radius: 5px; display: inline-block;">
                                                 {button_text} &rarr;
                                             </a>
                                         </td>

src/leetcode_api.py

@@ -1,16 +1,26 @@
 import requests
 from . import config
+from cachetools import TTLCache, cached
 
+cache = TTLCache(maxsize=1, ttl=540000)
+@cached(cache)
 def get_daily_question():
     """Fetches the title and link of the daily LeetCode question"""
     try:
+        cached_result = cache.get('daily_question')
+        if cached_result:
+            print("Fetched daily question from cache.")
+            return cached_result
+        
         response = requests.post(
             config.LEETCODE_API_URL, 
             json={'query': config.QUERY_DAILY_QUESTION}
         )
         response.raise_for_status()
         q_data = response.json()["data"]["activeDailyCodingChallengeQuestion"]
         q_data['fullLink'] = "https://leetcode.com" + q_data['link']
+
+        cache['daily_question'] = q_data
         return q_data
 
     except Exception as e: