align the topics

Author: yilinxia

backend/app/main.py

@@ -474,17 +474,19 @@ def get_unique_repos():
         topics_lower = [t.lower() for t in topics]
         placeholders = ",".join(["?"] * len(topics_lower))
 
-        # Query to get unique repositories that have ANY of the given topics
-        # Create a single search pattern that matches any of the topics
-        search_pattern = '%' + '%'.join(topics_lower) + '%'
-        query = """
+        # Query to get unique repositories that have ANY of the given topics using exact matching
+        conditions = []
+        for topic in topics_lower:
+            conditions.append(f"LOWER(t.topics) LIKE '%|{topic}|%' OR LOWER(t.topics) LIKE '{topic}|%' OR LOWER(t.topics) LIKE '%|{topic}' OR LOWER(t.topics) = '{topic}'")
+        
+        query = f"""
             SELECT COUNT(DISTINCT r.nameWithOwner) as count
             FROM repos r
             JOIN repo_topics t ON r.nameWithOwner = t.repo
-            WHERE LOWER(t.topics) LIKE ?
+            WHERE ({" OR ".join(conditions)})
         """
 
-        result = topic_service.con.execute(query, [search_pattern]).fetchone()
+        result = topic_service.con.execute(query).fetchone()
         count = result[0] if result else 0
 
         return jsonify({

backend/app/services/edge_generation_service.py

@@ -212,10 +212,10 @@ def _get_repos_for_topics(self, topics: List[str]) -> List[Dict]:
         topics_lower = [t.lower() for t in topics]
         placeholders = ",".join(["?"] * len(topics_lower))
 
-        # Create a more flexible search pattern using OR conditions
+        # Create exact topic matching conditions
         conditions = []
         for topic in topics_lower:
-            conditions.append(f"LOWER(t.topics) LIKE '%{topic}%'")
+            conditions.append(f"LOWER(t.topics) LIKE '%|{topic}|%' OR LOWER(t.topics) LIKE '{topic}|%' OR LOWER(t.topics) LIKE '%|{topic}' OR LOWER(t.topics) = '{topic}'")
 
         query = f"""
             WITH matching_repos AS (

backend/app/services/gexf_node_service.py

@@ -77,10 +77,10 @@ def generate_gexf_nodes_for_topics(self, topics):
                 WHERE (
             """
 
-            # Add each topic as a separate OR condition
+            # Add each topic as a separate OR condition with exact matching
             conditions = []
             for topic in topics_lower:
-                conditions.append(f"LOWER(t.topics) LIKE '%{topic}%'")
+                conditions.append(f"LOWER(t.topics) LIKE '%|{topic}|%' OR LOWER(t.topics) LIKE '{topic}|%' OR LOWER(t.topics) LIKE '%|{topic}' OR LOWER(t.topics) = '{topic}'")
 
             temp_table_query += " OR ".join(conditions) + ");"
             self.con.execute(temp_table_query)