o &zh@sdZddlZddlmZmZddlmZddlmZddl m Z ddl m Z d d Z Gd d d ZGd ddZGdddZeZdS)a Source groups are the means by which image spec sources are identified. They have two responsibilities: 1. To dispatch ``source_saved`` signals. (These will be relayed to the corresponding specs' cache file strategies.) 2. To provide the source files that they represent, via a generator method named ``files()``. (This is used by the generateimages management command for "pre-caching" image files.) N) post_init post_savewraps)LazyImageCacheFile) source_saved)get_nonabstract_descendantscstfdd}|S)z A method decorator that filters out signals coming from models that don't have fields that function as ImageFieldSourceGroup sources. csDt|sdS|jD]}t||jr|fd|i|dSq dS)Nsender)inspectisclass_source_groups issubclass model_class)selfr kwargssrcfnV/var/www/html/kangema/venv/lib/python3.10/site-packages/imagekit/specs/sourcegroups.pyreceivers   z#ik_model_receiver..receiverr)rrrrrik_model_receivers rc@s\eZdZdZddZddZddZdd Zd d Ze dddZ e dddZ ddZ d S)ModelSignalRoutera Normally, ``ImageFieldSourceGroup`` would be directly responsible for watching for changes on the model field it represents. However, Django does not dispatch events for abstract base classes. Therefore, we must listen for the signals on all models and filter out those that aren't represented by ``ImageFieldSourceGroup``s. This class encapsulates that functionality. Related: https://github.com/matthewwithanm/django-imagekit/issues/126 https://code.djangoproject.com/ticket/9318 cCs.g|_d}tj|j|dtj|j|ddS)Nik_spec_field_receivers) dispatch_uid)r rconnectpost_init_receiverrpost_save_receiver)ruidrrr__init__9szModelSignalRouter.__init__cCs|j|dSN)r append)r source_grouprrradd?zModelSignalRouter.addcCst|di|_dS)N_ik)getattrr&rinstancerrr init_instanceBszModelSignalRouter.init_instancecs2|fdd|Djd<jdS)z Stores hashes of the source image files so that they can be compared later to see whether the source image has changed (and therefore whether the spec file needs to be regenerated). csi|] }|tt|qSr)hashr').0attnamer)rr Msz:ModelSignalRouter.update_source_hashes.. source_hashes)r*get_source_fieldsr&r(rr.rupdate_source_hashesEs   z&ModelSignalRouter.update_source_hashescsfdd|jDS)zN Returns a list of the source fields for the given instance. csh|] }t|jr|jqSr) isinstancer image_field)r,rr.rr Ws  z6ModelSignalRouter.get_source_fields..)r r(rr.rr1Rs z#ModelSignalRouter.get_source_fieldsNFc Ks|s=|||jdi}||}||D]$} |r#| |vr#qt|| } | r<|| || kr<|t| ||| qdSdS)Nr0) r*r&getcopyr2r1r'dispatch_signalr) rr r)created update_fieldsrawr old_hashes new_hashesr-filerrrr\s     z$ModelSignalRouter.post_save_receiverc sF||||fdd|jjD}dd|D|jd<dS)Ncsi|] }|jvr|j|qSr)name)r,field source_fieldsrrr/os  z8ModelSignalRouter.post_init_receiver..cSsi|] \}}|t|qSr)r+)r,r- file_fieldrrrr/ssr0)r*r1_meta local_fieldsitemsr&)rr r)rrErrArrks   z$ModelSignalRouter.post_init_receivercCs4|jD]}t||jr|j|kr|j||dqdS)z Dispatch the signal for each of the matching source groups. Note that more than one source can have the same model and image_field; it's important that we dispatch the signal for each. )r sourceN)r rrr4send)rsignalr>rr)r-r#rrrr8ws z!ModelSignalRouter.dispatch_signal)NFNFr!) __name__ __module__ __qualname____doc__r r$r*r2r1rrrr8rrrrr+s     rc@s eZdZdZddZddZdS)ImageFieldSourceGroupzt A source group that represents a particular field across all instances of a model and its subclasses. cCs||_||_t|dSr!)rr4 signal_routerr$)rrr4rrrr szImageFieldSourceGroup.__init__ccs8t|jD]}|jD] }t||jVqqdS)z A generator that returns the source files that this source group represents; in this case, a particular field of every instance of a particular model and its subclasses. N)r robjectsalliteratorr'r4)rmodelr)rrrfiless zImageFieldSourceGroup.filesN)rJrKrLrMr rTrrrrrNs rNc@s8eZdZdZddZddZddZdd Zd d Zd S) SourceGroupFilesGeneratorzO A Python generator that yields cache file objects for source groups. cCs||_||_dSr!)r# generator_id)rr#rVrrrr s z"SourceGroupFilesGenerator.__init__cCst||jo |j|jkSr!)r3 __class____dict__rotherrrr__eq__s  z SourceGroupFilesGenerator.__eq__cCs || Sr!)r[rYrrr__ne__s z SourceGroupFilesGenerator.__ne__cCst|j|jfSr!)r+r#rV)rrrr__hash__r%z"SourceGroupFilesGenerator.__hash__ccs&|jD] }t|j|dVqdS)N)rG)r#rTrrV)r source_filerrr__call__s  z"SourceGroupFilesGenerator.__call__N) rJrKrLrMr r[r\r]r_rrrrrUs rU)rMr django.db.models.signalsrrdjango.utils.functionalr cachefilesrsignalsrutilsr rrrNrUrOrrrrs     X