from helpers.state_manager import StateManager from helpers.os_environment import isWindows, resolve_external_file_path from typing import List from setproctitle import setproctitle from multiprocessing import current_process, Queue from time import sleep import os import json from syncer import sync from helpers.logging_manager import LoggingManager from helpers.the_terminator import Terminator from helpers.myradio_api import MyRadioAPI from helpers.normalisation import generate_normalised_file from baps_types.plan import PlanItem class FileManager: logger: LoggingManager api: MyRadioAPI def __init__(self, channel_from_q: List[Queue], server_config: StateManager): self.logger = LoggingManager("FileManager") self.api = MyRadioAPI(self.logger, server_config) process_title = "File Manager" setproctitle(process_title) current_process().name = process_title terminator = Terminator() self.channel_count = len(channel_from_q) self.channel_received = None self.last_known_show_plan = [[]]*self.channel_count self.next_channel_preload = 0 self.known_channels_preloaded = [False]*self.channel_count self.known_channels_normalised = [False]*self.channel_count self.last_known_item_ids = [[]]*self.channel_count try: while not terminator.terminate: # If all channels have received the delete command, reset for the next one. if (self.channel_received == None or self.channel_received == [True]*self.channel_count): self.channel_received = [False]*self.channel_count for channel in range(self.channel_count): try: message = channel_from_q[channel].get_nowait() except Exception: continue try: #source = message.split(":")[0] command = message.split(":",2)[1] # If we have requested a new show plan, empty the music-tmp directory for the previous show. if command == "GET_PLAN": if self.channel_received != [False]*self.channel_count and self.channel_received[channel] != True: # We've already received a delete trigger on a channel, let's not delete the folder more than once. # If the channel was already in the process of being deleted, the user has requested it again, so allow it. self.channel_received[channel] = True continue # Delete the previous show files! # Note: The players load into RAM. If something is playing over the load, the source file can still be deleted. path: str = resolve_external_file_path("/music-tmp/") if not os.path.isdir(path): self.logger.log.warning("Music-tmp folder is missing, not handling.") continue files = [f for f in os.listdir(path) if os.path.isfile(os.path.join(path, f))] for file in files: if isWindows(): filepath = path+"\\"+file else: filepath = path+"/"+file self.logger.log.info("Removing file {} on new show load.".format(filepath)) try: os.remove(filepath) except Exception: self.logger.log.warning("Failed to remove, skipping. Likely file is still in use.") continue self.channel_received[channel] = True self.known_channels_preloaded = [False]*self.channel_count self.known_channels_normalised = [False]*self.channel_count # If we receive a new status message, let's check for files which have not been pre-loaded. if command == "STATUS": extra = message.split(":",3) if extra[2] != "OKAY": continue status = json.loads(extra[3]) show_plan = status["show_plan"] item_ids = [] for item in show_plan: item_ids += item["timeslotitemid"] # If the new status update has a different order / list of items, let's update the show plan we know about # This will trigger the chunk below to do the rounds again and preload any new files. if item_ids != self.last_known_item_ids[channel]: self.last_known_item_ids[channel] = item_ids self.last_known_show_plan[channel] = show_plan self.known_channels_preloaded[channel] = False except Exception: self.logger.log.exception("Failed to handle message {} on channel {}.".format(message, channel)) # Let's try preload / normalise some files now we're free of messages. preloaded = self.do_preload() normalised = self.do_normalise() if (not preloaded and not normalised): # We didn't do any hard work, let's sleep. sleep(0.2) except Exception as e: self.logger.log.exception( "Received unexpected exception: {}".format(e)) del self.logger # Attempt to preload a file onto disk. def do_preload(self): channel = self.next_channel_preload # All channels have preloaded all files, do nothing. if (self.known_channels_preloaded == [True]*self.channel_count): return False # Didn't preload anything # Right, let's have a quick check in the status for shows without filenames, to preload them. # Keep an eye on if we downloaded anything. # If we didn't, we know that all items in this channel have been downloaded. downloaded_something = False for i in range(len(self.last_known_show_plan[channel])): item_obj = PlanItem(self.last_known_show_plan[channel][i]) # We've not downloaded this file yet, let's do that. if not item_obj.filename: self.logger.log.info("Checking pre-load on channel {}, weight {}: {}".format(channel, item_obj.weight, item_obj.name)) # Getting the file name will only pull the new file if the file doesn't already exist, so this is not too inefficient. item_obj.filename,did_download = sync(self.api.get_filename(item_obj, True)) # Alright, we've done one, now let's give back control to process new statuses etc. # Save back the resulting item back in regular dict form self.last_known_show_plan[channel][i] = item_obj.__dict__ if did_download: downloaded_something = True self.logger.log.info("File successfully preloaded: {}".format(item_obj.filename)) break else: # We didn't download anything this time, file was already loaded. # Let's try the next one. continue # Tell the file manager that this channel is fully downloaded, this is so it can consider normalising once all channels have files. self.known_channels_preloaded[channel] = not downloaded_something self.next_channel_preload += 1 if self.next_channel_preload >= self.channel_count: self.next_channel_preload = 0 return downloaded_something # If we've preloaded everything, get to work normalising tracks before playback. def do_normalise(self): # Some channels still have files to preload, do nothing. if (self.known_channels_preloaded != [True]*self.channel_count): return False # Didn't normalise # Quit early if all channels are normalised already. if (self.known_channels_normalised == [True]*self.channel_count): return False channel = self.next_channel_preload normalised_something = False # Look through all the show plan files for i in range(len(self.last_known_show_plan[channel])): item_obj = PlanItem(self.last_known_show_plan[channel][i]) filename = item_obj.filename if not filename: self.logger.log.exception("Somehow got empty filename when all channels are preloaded.") continue # Try next song. elif (not os.path.isfile(filename)): self.logger.log.exception("Filename for normalisation does not exist. This is bad.") continue elif "normalised" in filename: continue # Sweet, we now need to try generating a normalised version. try: self.logger.log.info("Normalising on channel {}: {}".format(channel,filename)) # This will return immediately if we already have a normalised file. item_obj.filename = generate_normalised_file(filename) # TODO Hacky self.last_known_show_plan[channel][i] = item_obj.__dict__ normalised_something = True break # Now go let another channel have a go. except Exception as e: self.logger.log.exception("Failed to generate normalised file.", str(e)) continue self.known_channels_normalised[channel] = not normalised_something self.next_channel_preload += 1 if self.next_channel_preload >= self.channel_count: self.next_channel_preload = 0 return normalised_something