1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
#!/usr/bin/env python3
import hashlib
import json
import math
import os
from datetime import timedelta
from flask import Flask
from lib.tinytag import TinyTag
def get_books(root_path, cache=None):
'''
Discover audiobooks under :root_path: and populate books object
:cache: existing JSON cache, used to determine which content is new
(existing content is not re-hashed)
'''
if not os.path.exists(root_path):
raise ValueError('root path does not exist: %s' % root_path)
# '/home/user/audiobooks/book': d815c7a3cc11f08558b4d91ca93de023
existing_books = {}
if cache:
for k, _ in cache.items():
existing_books[cache[k]['path']] = k
book_dirs = list()
for root, dirs, _ in os.walk(root_path):
for d in dirs:
book_dirs.append(os.path.join(root, d))
books = dict()
for book_path in book_dirs:
# if already cached, populate books with existing k/v
if book_path in existing_books:
_hash = existing_books[book_path]
books[_hash] = cache[_hash]
continue
book = is_book(book_path)
if book:
books[book[0]] = book[1]
return books
def is_book(book_path):
# book attributes to be populated
book = {
'author': None,
'duration': 0,
'duration_str': None,
'files': dict(),
'path': book_path,
'size_bytes': 0,
'size_str': None,
'title': None
}
# hash of each file in directory w/ MP3 extension
folder_hash = hashlib.md5()
# a book_path is only a book if it contains at least one MP3
is_book = False
for f in os.listdir(book_path):
file_path = os.path.join(book_path, f)
if not os.path.isfile(file_path) or not f.endswith('.mp3'):
continue
tag = TinyTag.get(file_path)
if not tag.duration:
continue
# previous conditions met, we're a book! :D
is_book = True
print('[+] processing: %s' % book_path)
# update collective hash of folder with MD5 of current file
BLOCK = 1024
file_hash = hashlib.md5()
with open(file_path, 'rb') as f:
while True:
data = f.read(BLOCK)
if not data:
break
folder_hash.update(data)
file_hash.update(data)
# per-MP3 atributes, some values are populated conditionally
mp3 = {
'album': None,
'author': None,
'duration': tag.duration,
'duration_str': None,
'filename': os.path.split(file_path)[1],
'path': file_path,
'size_bytes': None,
'title': None,
'track': None
}
mp3['album'] = validate(tag.album, os.path.split(book_path)[1])
mp3['author'] = validate(tag.artist, 'Unknown')
mp3['duration'] = tag.duration
# 1 day, 10:59:58
duration_str = str(timedelta(seconds=mp3['duration']))
mp3['duration_str'] = duration_str.split('.')[0]
mp3['title'] = validate(tag.title, os.path.split(file_path)[1])
mp3['track'] = tag.track
mp3['size_bytes'] = tag.filesize
# we assume author and album attributes are unchanged between MP3s
book['author'] = mp3['author']
book['title'] = mp3['album']
# increment book total size/duration
book['duration'] += tag.duration
book['size_bytes'] += tag.filesize
# hexdigest: MP3 dict
book['files'][file_hash.hexdigest()] = mp3
# if we're a book, store formatted book size and duration
if is_book:
folder_hash = folder_hash.hexdigest()
total_size = book['size_bytes']
try:
_i = int(math.floor(math.log(total_size, 1024)))
_p = math.pow(1024, _i)
_s = round(total_size / _p, 2)
except:
_i = 1
_s = 0
# e.g. 1.48 GB
SIZES = ('B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB')
book['size_str'] = '%s %s' % (str(_s), SIZES[_i])
# e.g. 2 days, 5:47:47
duration_str = str(timedelta(seconds=book['duration']))
book['duration_str'] = duration_str.split('.')[0]
return (folder_hash, book)
return False
def write_cache(books, json_path):
'''
Dump contents of :books: to :json_path:
'''
cache_path = os.path.dirname(json_path)
if not os.path.exists(cache_path):
os.mkdir(cache_path)
with open(json_path, 'w') as f:
json.dump(books, f, indent=4)
def read_cache(json_path):
with open(json_path, 'r') as cache:
books = json.load(cache)
return books
def validate(v, b):
'''
Returns :v: if v and v.isspace(), otherwise b
:v: preferred value
:b: backup value
'''
if v and not v.isspace():
return v
else:
return b
if __name__ == '__main__':
ABS_PATH = os.path.dirname(os.path.abspath(__file__))
CACHE_PATH = os.path.join(ABS_PATH, 'cache')
JSON_PATH = os.path.join(CACHE_PATH, 'audiobooks.json')
# use Flask's config parser, configparser would be hacky
APP = Flask(__name__)
APP.config.from_pyfile(os.path.join(ABS_PATH, 'app.cfg'))
if os.path.exists(JSON_PATH):
cache = read_cache(JSON_PATH)
BOOKS = get_books(APP.config['ROOT_PATH'], cache)
else:
BOOKS = get_books(APP.config['ROOT_PATH'])
write_cache(BOOKS, JSON_PATH)
|