initial commit, injest POC done

injest.py

@@ -0,0 +1,82 @@
+class injest:
+    def __init__(self):
+
+    
+    def update_entity_data_cache(entity, data):
+        current_time = time.strftime('%Y%m%d%H%M%S')
+        directory = f'data/{entity}' # Directory name is the entity's name
+        if not os.path.exists(directory):
+            os.makedirs(directory)  # Create the directory if it does not exist
+        entity_file = f'{directory}/{current_time}.json'  # Separate file for each entity's data
+        with open(entity_file, 'w') as f:
+            json.dump(data, f, indent=4)
+
+    def update_server_knowledge_cache(entity, server_knowledge):
+        knowledge_file = 'server_knowledge_cache.json'
+        try:
+            with open(knowledge_file, 'r') as f:
+                knowledge_cache = json.load(f)
+        except FileNotFoundError:
+            knowledge_cache = {}
+        
+        knowledge_cache[entity] = server_knowledge
+        
+        with open(knowledge_file, 'w') as f:
+            json.dump(knowledge_cache, f, indent=4)
+
+    def check_rate_limit(response):
+        rate_limit_header = response.headers.get('X-Rate-Limit')
+        if rate_limit_header:
+            requests_made, limit = map(int, rate_limit_header.split('/'))
+            remaining_requests = limit - requests_made
+            logging.info(f"Rate Limit: {remaining_requests}/{limit} requests remaining.")
+            if remaining_requests < 20:  # Arbitrary low number to start handling the limit
+                logging.warning("Approaching rate limit. Consider pausing further requests.")
+                # Implement pause or delay logic here if necessary
+        else:
+            logging.warning("X-Rate-Limit header is missing.")
+
+    def fetch_and_cache_entity_data(budget_id):
+        entities = ['accounts', 'categories', 'months', 'payees', 'transactions', 'scheduled_transactions']
+        base_url = 'https://api.ynab.com/v1/budgets'
+        knowledge_file = 'server_knowledge_cache.json'
+        
+        # Load existing server knowledge cache
+        try:
+            with open(knowledge_file, 'r') as f:
+                knowledge_cache = json.load(f)
+        except FileNotFoundError:
+            knowledge_cache = {}
+        
+        for entity in entities:
+            last_knowledge = knowledge_cache.get(entity, 0)
+            logging.debug(f'Last Knowledge of {entity.capitalize()}: {last_knowledge}')
+            url = f'{base_url}/{budget_id}/{entity}'
+            if last_knowledge:
+                logging.info(f'Fetching {entity} data since last knowledge: {last_knowledge}')
+                url = url + f'?last_knowledge_of_server={last_knowledge}'
+            
+            response = requests.get(url, headers=headers)
+            check_rate_limit(response)  # Check and handle rate limit
+            
+            if response.status_code == 429:  # HTTP 429 Too Many Requests
+                logging.error("Rate limit exceeded. Pausing until the limit is reset.")
+                # Implement pause until the limit reset logic here
+                break
+            
+            data = response.json()
+            
+            server_knowledge = data['data'].get('server_knowledge')
+            logging.debug(f'{entity.capitalize()} Server Knowledge: {server_knowledge}')
+            
+            # Check if there is new server knowledge
+            if server_knowledge is not None and server_knowledge != last_knowledge:
+                # Update server knowledge cache
+                update_server_knowledge_cache(entity, server_knowledge)
+                
+                # Update entity data cache without server knowledge
+                entity_data = data['data']
+                entity_data.pop('server_knowledge', None)  # Remove server knowledge if exists
+                update_entity_data_cache(entity, entity_data)
+            else:
+                logging.info(f"No new data for {entity}. Skipping cache update.")