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f42e49c3 | 1 | # GNU MediaGoblin -- federated, autonomous media hosting |
7f4ebeed | 2 | # Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS. |
f42e49c3 E |
3 | # |
4 | # This program is free software: you can redistribute it and/or modify | |
5 | # it under the terms of the GNU Affero General Public License as published by | |
6 | # the Free Software Foundation, either version 3 of the License, or | |
7 | # (at your option) any later version. | |
8 | # | |
9 | # This program is distributed in the hope that it will be useful, | |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | # GNU Affero General Public License for more details. | |
13 | # | |
14 | # You should have received a copy of the GNU Affero General Public License | |
15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | ||
17 | """ | |
18 | This module contains some Mixin classes for the db objects. | |
19 | ||
20 | A bunch of functions on the db objects are really more like | |
21 | "utility functions": They could live outside the classes | |
22 | and be called "by hand" passing the appropiate reference. | |
23 | They usually only use the public API of the object and | |
24 | rarely use database related stuff. | |
25 | ||
26 | These functions now live here and get "mixed in" into the | |
27 | real objects. | |
28 | """ | |
29 | ||
a81082fc | 30 | import uuid |
72bb46c7 | 31 | |
5f8b4ae8 SS |
32 | from werkzeug.utils import cached_property |
33 | ||
814334f6 | 34 | from mediagoblin import mg_globals |
f42e49c3 | 35 | from mediagoblin.auth import lib as auth_lib |
5f8b4ae8 | 36 | from mediagoblin.media_types import get_media_managers, FileTypeNotSupported |
17c23e15 | 37 | from mediagoblin.tools import common, licenses |
e61ab099 | 38 | from mediagoblin.tools.text import cleaned_markdown_conversion |
814334f6 | 39 | from mediagoblin.tools.url import slugify |
f42e49c3 E |
40 | |
41 | ||
42 | class UserMixin(object): | |
43 | def check_login(self, password): | |
44 | """ | |
45 | See if a user can login with this password | |
46 | """ | |
47 | return auth_lib.bcrypt_check_password( | |
48 | password, self.pw_hash) | |
49 | ||
e61ab099 E |
50 | @property |
51 | def bio_html(self): | |
52 | return cleaned_markdown_conversion(self.bio) | |
53 | ||
f42e49c3 | 54 | |
29c65044 | 55 | class GenerateSlugMixin(object): |
814334f6 | 56 | def generate_slug(self): |
88de830f | 57 | """ |
98587109 CAW |
58 | Generate a unique slug for this MediaEntry. |
59 | ||
88de830f CAW |
60 | This one does not *force* slugs, but usually it will probably result |
61 | in a niceish one. | |
62 | ||
98587109 CAW |
63 | The end *result* of the algorithm will result in these resolutions for |
64 | these situations: | |
88de830f CAW |
65 | - If we have a slug, make sure it's clean and sanitized, and if it's |
66 | unique, we'll use that. | |
67 | - If we have a title, slugify it, and if it's unique, we'll use that. | |
68 | - If we can't get any sort of thing that looks like it'll be a useful | |
69 | slug out of a title or an existing slug, bail, and don't set the | |
70 | slug at all. Don't try to create something just because. Make | |
71 | sure we have a reasonable basis for a slug first. | |
72 | - If we have a reasonable basis for a slug (either based on existing | |
73 | slug or slugified title) but it's not unique, first try appending | |
74 | the entry's id, if that exists | |
75 | - If that doesn't result in something unique, tack on some randomly | |
76 | generated bits until it's unique. That'll be a little bit of junk, | |
77 | but at least it has the basis of a nice slug. | |
78 | """ | |
66d9f1b2 SS |
79 | #Is already a slug assigned? Check if it is valid |
80 | if self.slug: | |
81 | self.slug = slugify(self.slug) | |
b1126f71 | 82 | |
88de830f | 83 | # otherwise, try to use the title. |
66d9f1b2 | 84 | elif self.title: |
88de830f | 85 | # assign slug based on title |
66d9f1b2 | 86 | self.slug = slugify(self.title) |
b1126f71 | 87 | |
b0118957 CAW |
88 | # We don't want any empty string slugs |
89 | if self.slug == u"": | |
90 | self.slug = None | |
91 | ||
88de830f CAW |
92 | # Do we have anything at this point? |
93 | # If not, we're not going to get a slug | |
94 | # so just return... we're not going to force one. | |
95 | if not self.slug: | |
96 | return # giving up! | |
b1126f71 | 97 | |
88de830f | 98 | # Otherwise, let's see if this is unique. |
29c65044 | 99 | if self.check_slug_used(self.slug): |
88de830f | 100 | # It looks like it's being used... lame. |
b1126f71 | 101 | |
88de830f CAW |
102 | # Can we just append the object's id to the end? |
103 | if self.id: | |
98587109 | 104 | slug_with_id = u"%s-%s" % (self.slug, self.id) |
29c65044 | 105 | if not self.check_slug_used(slug_with_id): |
88de830f CAW |
106 | self.slug = slug_with_id |
107 | return # success! | |
b1126f71 | 108 | |
88de830f CAW |
109 | # okay, still no success; |
110 | # let's whack junk on there till it's unique. | |
a81082fc CAW |
111 | self.slug += '-' + uuid.uuid4().hex[:4] |
112 | # keep going if necessary! | |
29c65044 | 113 | while self.check_slug_used(self.slug): |
a81082fc | 114 | self.slug += uuid.uuid4().hex[:4] |
814334f6 | 115 | |
29c65044 E |
116 | |
117 | class MediaEntryMixin(GenerateSlugMixin): | |
118 | def check_slug_used(self, slug): | |
119 | # import this here due to a cyclic import issue | |
120 | # (db.models -> db.mixin -> db.util -> db.models) | |
121 | from mediagoblin.db.util import check_media_slug_used | |
122 | ||
123 | return check_media_slug_used(self.uploader, slug, self.id) | |
124 | ||
1e72e075 E |
125 | @property |
126 | def description_html(self): | |
127 | """ | |
128 | Rendered version of the description, run through | |
129 | Markdown and cleaned with our cleaning tool. | |
130 | """ | |
131 | return cleaned_markdown_conversion(self.description) | |
132 | ||
e77df64f CAW |
133 | def get_display_media(self): |
134 | """Find the best media for display. | |
f42e49c3 | 135 | |
53024776 | 136 | We try checking self.media_manager.fetching_order if it exists to |
e77df64f | 137 | pull down the order. |
f42e49c3 E |
138 | |
139 | Returns: | |
ddbf6af1 CAW |
140 | (media_size, media_path) |
141 | or, if not found, None. | |
e77df64f | 142 | |
f42e49c3 | 143 | """ |
ddbf6af1 | 144 | fetch_order = self.media_manager.get("media_fetch_order") |
f42e49c3 | 145 | |
ddbf6af1 CAW |
146 | # No fetching order found? well, give up! |
147 | if not fetch_order: | |
148 | return None | |
149 | ||
150 | media_sizes = self.media_files.keys() | |
151 | ||
152 | for media_size in fetch_order: | |
f42e49c3 | 153 | if media_size in media_sizes: |
ddbf6af1 | 154 | return media_size, self.media_files[media_size] |
f42e49c3 E |
155 | |
156 | def main_mediafile(self): | |
157 | pass | |
158 | ||
3e907d55 E |
159 | @property |
160 | def slug_or_id(self): | |
7de20e52 CAW |
161 | if self.slug: |
162 | return self.slug | |
163 | else: | |
164 | return u'id:%s' % self.id | |
5f8b4ae8 | 165 | |
cb7ae1e4 | 166 | def url_for_self(self, urlgen, **extra_args): |
f42e49c3 E |
167 | """ |
168 | Generate an appropriate url for ourselves | |
169 | ||
5c2b8486 | 170 | Use a slug if we have one, else use our 'id'. |
f42e49c3 E |
171 | """ |
172 | uploader = self.get_uploader | |
173 | ||
3e907d55 E |
174 | return urlgen( |
175 | 'mediagoblin.user_pages.media_home', | |
176 | user=uploader.username, | |
177 | media=self.slug_or_id, | |
178 | **extra_args) | |
f42e49c3 | 179 | |
2e4ad359 SS |
180 | @property |
181 | def thumb_url(self): | |
182 | """Return the thumbnail URL (for usage in templates) | |
183 | Will return either the real thumbnail or a default fallback icon.""" | |
184 | # TODO: implement generic fallback in case MEDIA_MANAGER does | |
185 | # not specify one? | |
186 | if u'thumb' in self.media_files: | |
187 | thumb_url = mg_globals.app.public_store.file_url( | |
188 | self.media_files[u'thumb']) | |
189 | else: | |
df1c4976 | 190 | # No thumbnail in media available. Get the media's |
2e4ad359 | 191 | # MEDIA_MANAGER for the fallback icon and return static URL |
5f8b4ae8 SS |
192 | # Raises FileTypeNotSupported in case no such manager is enabled |
193 | manager = self.media_manager | |
df1c4976 | 194 | thumb_url = mg_globals.app.staticdirector(manager[u'default_thumb']) |
2e4ad359 SS |
195 | return thumb_url |
196 | ||
5f8b4ae8 SS |
197 | @cached_property |
198 | def media_manager(self): | |
199 | """Returns the MEDIA_MANAGER of the media's media_type | |
200 | ||
201 | Raises FileTypeNotSupported in case no such manager is enabled | |
202 | """ | |
203 | # TODO, we should be able to make this a simple lookup rather | |
204 | # than iterating through all media managers. | |
205 | for media_type, manager in get_media_managers(): | |
206 | if media_type == self.media_type: | |
207 | return manager | |
208 | # Not found? Then raise an error | |
209 | raise FileTypeNotSupported( | |
210 | "MediaManager not in enabled types. Check media_types in config?") | |
211 | ||
f42e49c3 E |
212 | def get_fail_exception(self): |
213 | """ | |
214 | Get the exception that's appropriate for this error | |
215 | """ | |
51eb0267 JW |
216 | if self.fail_error: |
217 | return common.import_component(self.fail_error) | |
17c23e15 AW |
218 | |
219 | def get_license_data(self): | |
220 | """Return license dict for requested license""" | |
138a18fd | 221 | return licenses.get_license_by_url(self.license or "") |
feba5c52 | 222 | |
5bad26bc | 223 | def exif_display_iter(self): |
7b82f56b E |
224 | from mediagoblin.tools.exif import USEFUL_TAGS |
225 | ||
5bad26bc E |
226 | if not self.media_data: |
227 | return | |
228 | exif_all = self.media_data.get("exif_all") | |
229 | ||
230 | for key in USEFUL_TAGS: | |
231 | if key in exif_all: | |
232 | yield key, exif_all[key] | |
233 | ||
feba5c52 E |
234 | |
235 | class MediaCommentMixin(object): | |
236 | @property | |
237 | def content_html(self): | |
238 | """ | |
239 | the actual html-rendered version of the comment displayed. | |
240 | Run through Markdown and the HTML cleaner. | |
241 | """ | |
242 | return cleaned_markdown_conversion(self.content) | |
be5be115 AW |
243 | |
244 | ||
245 | class CollectionMixin(object): | |
246 | def generate_slug(self): | |
247 | # import this here due to a cyclic import issue | |
248 | # (db.models -> db.mixin -> db.util -> db.models) | |
249 | from mediagoblin.db.util import check_collection_slug_used | |
250 | ||
251 | self.slug = slugify(self.title) | |
252 | ||
253 | duplicate = check_collection_slug_used(mg_globals.database, | |
254 | self.creator, self.slug, self.id) | |
255 | ||
256 | if duplicate: | |
257 | if self.id is not None: | |
258 | self.slug = u"%s-%s" % (self.id, self.slug) | |
259 | else: | |
260 | self.slug = None | |
261 | ||
262 | @property | |
263 | def description_html(self): | |
264 | """ | |
265 | Rendered version of the description, run through | |
266 | Markdown and cleaned with our cleaning tool. | |
267 | """ | |
268 | return cleaned_markdown_conversion(self.description) | |
269 | ||
270 | @property | |
271 | def slug_or_id(self): | |
5c2b8486 | 272 | return (self.slug or self.id) |
be5be115 AW |
273 | |
274 | def url_for_self(self, urlgen, **extra_args): | |
275 | """ | |
276 | Generate an appropriate url for ourselves | |
277 | ||
5c2b8486 | 278 | Use a slug if we have one, else use our 'id'. |
be5be115 AW |
279 | """ |
280 | creator = self.get_creator | |
281 | ||
282 | return urlgen( | |
256f816f | 283 | 'mediagoblin.user_pages.user_collection', |
be5be115 AW |
284 | user=creator.username, |
285 | collection=self.slug_or_id, | |
286 | **extra_args) | |
287 | ||
6d1e55b2 | 288 | |
be5be115 AW |
289 | class CollectionItemMixin(object): |
290 | @property | |
291 | def note_html(self): | |
292 | """ | |
293 | the actual html-rendered version of the note displayed. | |
294 | Run through Markdown and the HTML cleaner. | |
295 | """ | |
296 | return cleaned_markdown_conversion(self.note) |