refactor: support search caching

remains to be seen whether this is a good idea or not

ythdd_extractor.py

@@ -348,29 +348,59 @@ def WEBgetSearchSuggestions(query: str, previous_query: str = '') -> list:
 	# Takes in a search query and returns relevant suggestions.
 	# Can optionally take the previous query but that's rather novel and
 	# not supported across players nor invidious API itself.
-	params = {
-    	'ds': 'yt',
-    	'hl': 'en', # host language
-    	'gl': 'us', # geolocation
-    	'client': 'youtube',
-    	'gs_ri': 'youtube',
-    	'q': str(query), # query
-    	'pq': str(previous_query) if previous_query is not None else '' # previous query
-	}
-
-	response = requests.get(
-    	'https://suggestqueries-clients6.youtube.com/complete/search',
-    	params=params,
-    	headers=stage2_headers
-	)
-	# can break anytime but hopefully the tiny speed gain will make up for it
-	results = response.text[23 + len(query):]
-	results = results[:results.rfind("{") - 1]
-	results = json.loads(results)
-
+	
 	suggestions = []
-	for result in results:
-		suggestions.append(result[0])
+
+	if not isinstance(query, str):
+		print("WEBgetSearchSuggestions: query is not a string (as it should)")
+		return {}
+	if not isinstance(previous_query, str):
+		previous_query = ''
+
+	if ythdd_globals.config["general"]["cache"]:
+		# look for cached suggestions
+		for cached_search in ythdd_globals.general_cache["search"]:
+			if cached_search["q"] == query.lower() and cached_search["pq"] == previous_query.lower():
+				# found it? skip ahead
+				suggestions = cached_search["resp"]
+				break
+
+	# request wasn't cached? query the API
+	if suggestions == []:
+
+		params = {
+			'ds': 'yt',
+			'hl': 'en', # host language
+			'gl': 'us', # geolocation
+			'client': 'youtube',
+			'gs_ri': 'youtube',
+			'q': query, # query
+			'pq': previous_query # previous query
+		}
+
+		response = requests.get(
+			'https://suggestqueries-clients6.youtube.com/complete/search',
+			params=params,
+			headers=stage2_headers
+		)
+
+		# can break anytime but hopefully the tiny speed gain will make up for it
+		results = response.text[23 + len(query):]
+		results = results[:results.rfind("{") - 1]
+		results = json.loads(results)
+
+		for result in results:
+			suggestions.append(result[0])
+
+		# cache response
+		if ythdd_globals.config["general"]["cache"]:
+			ythdd_globals.general_cache["search"].append(
+				{
+					"q": query.lower(),
+					"pq": previous_query.lower(),
+					"resp": suggestions
+				}
+			)
 
 	return {
 		"query": query,