146 lines
4.1 KiB
Python
146 lines
4.1 KiB
Python
"""
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functionality:
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- interact with redis
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- hold temporary download queue in redis
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"""
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import json
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import os
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import redis
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class RedisBase:
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"""connection base for redis"""
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REDIS_HOST = os.environ.get("REDIS_HOST")
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REDIS_PORT = os.environ.get("REDIS_PORT") or 6379
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NAME_SPACE = "ta:"
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def __init__(self):
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self.conn = redis.Redis(host=self.REDIS_HOST, port=self.REDIS_PORT)
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class RedisArchivist(RedisBase):
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"""collection of methods to interact with redis"""
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CHANNELS = [
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"download",
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"add",
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"rescan",
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"subchannel",
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"subplaylist",
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"playlistscan",
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"setting",
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]
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def set_message(self, key, message, expire=True):
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"""write new message to redis"""
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self.conn.execute_command(
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"JSON.SET", self.NAME_SPACE + key, ".", json.dumps(message)
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)
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if expire:
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if isinstance(expire, bool):
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secs = 20
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else:
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secs = expire
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self.conn.execute_command("EXPIRE", self.NAME_SPACE + key, secs)
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def get_message(self, key):
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"""get message dict from redis"""
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reply = self.conn.execute_command("JSON.GET", self.NAME_SPACE + key)
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if reply:
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json_str = json.loads(reply)
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else:
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json_str = {"status": False}
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return json_str
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def list_items(self, query):
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"""list all matches"""
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reply = self.conn.execute_command(
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"KEYS", self.NAME_SPACE + query + "*"
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)
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all_matches = [i.decode().lstrip(self.NAME_SPACE) for i in reply]
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all_results = []
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for match in all_matches:
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json_str = self.get_message(match)
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all_results.append(json_str)
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return all_results
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def del_message(self, key):
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"""delete key from redis"""
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response = self.conn.execute_command("DEL", self.NAME_SPACE + key)
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return response
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def get_lock(self, lock_key):
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"""handle lock for task management"""
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redis_lock = self.conn.lock(self.NAME_SPACE + lock_key)
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return redis_lock
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def is_locked(self, lock_key):
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"""check if lock is set"""
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lock_name = self.NAME_SPACE + lock_key
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lock_status = bool(self.conn.execute_command("GET", lock_name))
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return lock_status
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def get_progress(self):
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"""get a list of all progress messages"""
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all_messages = []
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for channel in self.CHANNELS:
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key = "message:" + channel
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reply = self.conn.execute_command(
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"JSON.GET", self.NAME_SPACE + key
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)
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if reply:
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json_str = json.loads(reply)
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all_messages.append(json_str)
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return all_messages
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class RedisQueue(RedisBase):
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"""dynamically interact with the download queue in redis"""
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def __init__(self):
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super().__init__()
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self.key = self.NAME_SPACE + "dl_queue"
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def get_all(self):
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"""return all elements in list"""
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result = self.conn.execute_command("LRANGE", self.key, 0, -1)
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all_elements = [i.decode() for i in result]
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return all_elements
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def add_list(self, to_add):
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"""add list to queue"""
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self.conn.execute_command("RPUSH", self.key, *to_add)
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def add_priority(self, to_add):
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"""add single video to front of queue"""
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self.clear_item(to_add)
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self.conn.execute_command("LPUSH", self.key, to_add)
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def get_next(self):
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"""return next element in the queue, False if none"""
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result = self.conn.execute_command("LPOP", self.key)
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if not result:
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return False
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next_element = result.decode()
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return next_element
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def clear(self):
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"""delete list from redis"""
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self.conn.execute_command("DEL", self.key)
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def clear_item(self, to_clear):
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"""remove single item from list if it's there"""
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self.conn.execute_command("LREM", self.key, 0, to_clear)
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def trim(self, size):
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"""trim the queue based on settings amount"""
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self.conn.execute_command("LTRIM", self.key, 0, size)
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