o
    h?!                     @  s   U d dl mZ d dlZd dlZd dlZd dlmZ d dlmZ zd dl	Z
W n ey4   es2d dl
Z
Y nw erYd dlmZmZmZmZ d dlmZ ddlmZ eeef Zd	ed
< G dd dZdS )    )annotationsN)TYPE_CHECKING)atomic_write)AnyDictIteratorLiteral)	TypeAlias   )CachingFileSystemr	   Detailc                   @  s   e Zd ZdZd0ddZd1d
dZd2ddZ	d3d4ddZd5ddZd6dd Z	d7d!d"Z
d8d%d&Zd9d(d)Zd7d*d+Zd:d-d.Zd/S );CacheMetadataa\  Cache metadata.

    All reading and writing of cache metadata is performed by this class,
    accessing the cached files and blocks is not.

    Metadata is stored in a single file per storage directory in JSON format.
    For backward compatibility, also reads metadata stored in pickle format
    which is converted to JSON when next saved.
    storage	list[str]c                 C  s$   |st d|| _i g| _d| _dS )z

        Parameters
        ----------
        storage: list[str]
            Directories containing cached files, must be at least one. Metadata
            is stored in the last of these directories by convention.
        z3CacheMetadata expects at least one storage locationFN)
ValueError_storagecached_files_force_save_pickle)selfr    r   y/var/www/html/construction_image-detection-poc/venv/lib/python3.10/site-packages/fsspec/implementations/cache_metadata.py__init__%   s
   	
zCacheMetadata.__init__fnstrreturnr   c                 C  s   zt |d}t|}W d   n1 sw   Y  W n# ty?   t |d}t|}W d   n1 s8w   Y  Y nw | D ]}t|dtrVt	|d |d< qD|S )z6Low-level function to load metadata from specific filerNrbblocks)
openjsonloadr   picklevalues
isinstancegetlistset)r   r   floadedcr   r   r   _load8   s    zCacheMetadata._loadmetadata_to_saveNonec                 C  s~   | j r t|}t|| W d   dS 1 sw   Y  dS t|dd}t|| W d   dS 1 s8w   Y  dS )z4Low-level function to save metadata to specific fileNw)mode)r   r   r!   dumpr   )r   r+   r   r'   r   r   r   _saveE   s   
""zCacheMetadata._saveFwritable_onlyboolIterator[tuple[str, str, bool]]c                 c  sP    t | j}t| jD ]\}}||d k}|r|sqtj|d||fV  qdS )a  Yield locations (filenames) where metadata is stored, and whether
        writable or not.

        Parameters
        ----------
        writable: bool
            Set to True to only yield writable locations.

        Returns
        -------
        Yields (str, str, bool)
        r
   cacheN)lenr   	enumerateospathjoin)r   r1   nir   writabler   r   r   _scan_locationsN   s   
zCacheMetadata._scan_locationsr8   cfsCachingFileSystem | None#Literal[False] | tuple[Detail, str]c                 C  s   t |  | jD ]H\\}}}}||vrq||  }|dur;|jr,|d |j|kr,q|jr;t |d  |jkr;qt	j
||d }t	j
|rP||f  S qdS )zIf path is in cache return its details, otherwise return ``False``.

        If the optional CachingFileSystem is specified then it is used to
        perform extra checks to reject possible matches, such as if they are
        too old.
        Nuidtimer   F)zipr=   r   copycheck_filesfsukeyexpiryrB   r7   r8   r9   exists)r   r8   r>   r   base_r4   detailr   r   r   
check_filed   s   	zCacheMetadata.check_fileexpiry_timeinttuple[list[str], bool]c                 C  s   g }| j d   D ]4\}}t |d  |kr?|dd}|s(td| tj| j	d |}|
| | j d | q| j d rXtj| j	d d}| | j d | | j d  }||fS )zRemove expired metadata from the cache.

        Returns names of files corresponding to expired metadata and a boolean
        flag indicating whether the writable cache is empty. Caller is
        responsible for deleting the expired files.
        rB   r    z)Cache metadata does not contain 'fn' for r4   )r   rD   itemsrB   r$   RuntimeErrorr7   r8   r9   r   appendpopr0   )r   rN   expired_filesr8   rL   r   
cache_pathwritable_cache_emptyr   r   r   clear_expired   s"   

zCacheMetadata.clear_expiredc                 C  sP   g }|   D ]\}}}tj|r|| | q|i  q|p$i g| _dS )z>Load all metadata from disk and store in ``self.cached_files``N)r=   r7   r8   rI   rU   r*   r   )r   r   r   rK   r   r   r   r       s   zCacheMetadata.loadr'   r   c                 C  sF   | j d | }|d durt|d |j |jkr!d|d< dS dS dS )zPerform side-effect actions on closing a cached file.

        The actual closing of the file is the responsibility of the caller.
        rQ   r   TN)r   r5   	blocksizesize)r   r'   r8   r)   r   r   r   on_close_cached_file   s   $z"CacheMetadata.on_close_cached_file
str | Nonec                 C  sP   |  |d}|s
dS |\}}|| jd r$| jd | |   |S td)zRemove metadata of cached file.

        If path is in the cache, return the filename of the cached file,
        otherwise return ``None``.  Caller is responsible for deleting the
        cached file.
        NrQ   z<Can only delete cached file in last, writable cache location)rM   
startswithr   r   rV   savePermissionError)r   r8   detailsrK   r   r   r   r   pop_file   s   zCacheMetadata.pop_filec           	      C  sH  t |  | jD ]\\}}}}|sqtj|ru| |}| D ]A\}}||v rb|d du s7|| d du r<d|d< n|| d }||d  ||d< t	|d || d |d< || d |d< q!| D ]\}}||vrs|||< qgn|}dd | D }|
 D ]}t|d trt|d |d< q| || || jd< qdS )	zSave metadata to diskr   TrB   rA   c                 S  s   i | ]	\}}||  qS r   )rD   ).0kvr   r   r   
<dictcomp>   s    z&CacheMetadata.save.<locals>.<dictcomp>rQ   N)rC   r=   r   r7   r8   rI   r*   rS   updatemaxr"   r#   r&   r%   r0   )	r   r   rK   r<   r4   r   re   r)   r   r   r   r   r`      s:   

zCacheMetadata.saverL   c                 C  s   || j d |< dS )z8Update metadata for specific file in memory, do not saverQ   N)r   )r   r8   rL   r   r   r   update_file   s   zCacheMetadata.update_fileN)r   r   )r   r   r   r   )r+   r   r   r   r   r,   )F)r1   r2   r   r3   )r8   r   r>   r?   r   r@   )rN   rO   r   rP   )r   r,   )r'   r   r8   r   r   r,   )r8   r   r   r^   )r8   r   rL   r   r   r,   )__name__
__module____qualname____doc__r   r*   r0   r=   rM   rZ   r    r]   rc   r`   rj   r   r   r   r   r      s    











$r   )
__future__r   r7   r!   rB   typingr   fsspec.utilsr   ujsonr   ImportErrorr   r   r   r   typing_extensionsr	   cachedr   r   r   __annotations__r   r   r   r   r   <module>   s&    