o
    þÞhš  ã                   @   s„   d Z ddlmZmZ ddlmZ G dd„ deƒZG dd„ deƒZG dd	„ d	eƒZG d
d„ deƒZ	G dd„ deƒZ
G dd„ deƒZdS )z;Database functions that do comparisons or type conversions.é    )ÚFuncÚValue)Ú_lazy_re_compilec                       s\   e Zd ZdZdZdZ‡ fdd„Z‡ fdd„Z‡ fdd	„Zd
d„ Z	dd„ Z
‡ fdd„Z‡  ZS )ÚCastz)Coerce an expression to a new field type.ÚCASTz,%(function)s(%(expressions)s AS %(db_type)s)c                    s   t ƒ j||d� d S )N)Úoutput_field)ÚsuperÚ__init__)ÚselfÚ
expressionr   ©Ú	__class__© úe/var/www/html/premium_crap/venv/lib/python3.10/site-packages/django/db/models/functions/comparison.pyr	      s   zCast.__init__c                    s&   | j  |¡|d< tƒ j||fi |¤ŽS )NÚdb_type)r   Úcast_db_typer   Úas_sql©r
   ÚcompilerÚ
connectionÚextra_contextr   r   r   r      s   zCast.as_sqlc           	         s”   | j  |¡}|dv r-d}tƒ j||fd|i|¤Ž\}}|dkr!dnd}| d|¡ ||fS |dkr@d	}tƒ j||fd|i|¤ŽS | j||fi |¤ŽS )
N>   ÚtimeÚdatetimezstrftime(%%s, %(expressions)s)Útemplater   z%H:%M:%fz%Y-%m-%d %H:%M:%fr   Údatezdate(%(expressions)s))r   r   r   r   Úinsert)	r
   r   r   r   r   r   ÚsqlÚparamsÚformat_stringr   r   r   Ú	as_sqlite   s.   ÿÿ
ÿÿÿÿzCast.as_sqlitec                 K   sF   d }| j  ¡ }|dkrd}n	|dkr|jrd}| j||fd|i|¤ŽS )NÚ
FloatFieldz(%(expressions)s + 0.0)Ú	JSONFieldz"JSON_EXTRACT(%(expressions)s, '$')r   )r   Úget_internal_typeÚmysql_is_mariadbr   )r
   r   r   r   r   Úoutput_typer   r   r   Úas_mysql&   s   
zCast.as_mysqlc                 K   s   | j ||fddi|¤ŽS )Nr   z(%(expressions)s)::%(db_type)s)r   r   r   r   r   Úas_postgresql1   s   þýüzCast.as_postgresqlc                    s@   | j  ¡ dkrd}tƒ j||fd|i|¤ŽS | j||fi |¤ŽS )Nr!   z JSON_QUERY(%(expressions)s, '$')r   )r   r"   r   r   )r
   r   r   r   r   r   r   r   Ú	as_oracle<   s   ÿÿÿzCast.as_oracle)Ú__name__Ú
__module__Ú__qualname__Ú__doc__Úfunctionr   r	   r   r   r%   r&   r'   Ú__classcell__r   r   r   r   r      s    r   c                       s<   e Zd ZdZdZ‡ fdd„Zedd„ ƒZ‡ fdd„Z‡  Z	S )	ÚCoalescez:Return, from left to right, the first non-null expression.ÚCOALESCEc                    ó*   t |ƒdk r
tdƒ‚tƒ j|i |¤Ž d S )Né   z+Coalesce must take at least two expressions©ÚlenÚ
ValueErrorr   r	   ©r
   ÚexpressionsÚextrar   r   r   r	   K   ó   zCoalesce.__init__c                 C   s0   |   ¡ D ]}|j}|tu s|d ur|  S qd S )N)Úget_source_expressionsÚempty_result_set_valueÚNotImplemented)r
   r   Úresultr   r   r   r:   P   s   ÿzCoalesce.empty_result_set_valuec                    s\   | j  ¡ dkr$|  ¡ }| dd„ |  ¡ D ƒ¡ tt|ƒj||fi |¤ŽS | j||fi |¤ŽS )NÚ	TextFieldc                 S   s   g | ]}t |d d�‘qS )ÚTO_NCLOB)r,   )r   )Ú.0r   r   r   r   Ú
<listcomp>^   s    
ÿÿz&Coalesce.as_oracle.<locals>.<listcomp>)r   r"   ÚcopyÚset_source_expressionsr9   r   r.   r   )r
   r   r   r   Úcloner   r   r   r'   X   s   þÿzCoalesce.as_oracle)
r(   r)   r*   r+   r,   r	   Úpropertyr:   r'   r-   r   r   r   r   r.   F   s    
r.   c                       s<   e Zd ZdZdZdZedƒZ‡ fdd„Z‡ fdd„Z	‡  Z
S )	ÚCollateÚCOLLATEz*%(expressions)s %(function)s %(collation)sFz^[\w-]+$c                    s2   |r| j  |¡std| ƒ‚|| _tƒ  |¡ d S )NzInvalid collation name: %r.)Úcollation_reÚmatchr4   Ú	collationr   r	   )r
   r   rI   r   r   r   r	   o   s   zCollate.__init__c                    s,   |  d|j | j¡¡ tƒ j||fi |¤ŽS )NrI   )Ú
setdefaultÚopsÚ
quote_namerI   r   r   r   r   r   r   r   u   s   zCollate.as_sql)r(   r)   r*   r,   r   Úallowed_defaultr   rG   r	   r   r-   r   r   r   r   rE   g   s    rE   c                       ó0   e Zd ZdZdZ‡ fdd„Z‡ fdd„Z‡  ZS )ÚGreatestzý
    Return the maximum expression.

    If any expression is null the return value is database-specific:
    On PostgreSQL, the maximum not-null expression is returned.
    On MySQL, Oracle, and SQLite, if any expression is null, null is returned.
    ÚGREATESTc                    r0   )Nr1   z+Greatest must take at least two expressionsr2   r5   r   r   r   r	   …   r8   zGreatest.__init__c                    ó   t ƒ j||fddi|¤ŽS )zUse the MAX function on SQLite.r,   ÚMAX©r   r   r   r   r   r   r   Š   ó   zGreatest.as_sqlite©r(   r)   r*   r+   r,   r	   r   r-   r   r   r   r   rO   z   ó
    rO   c                       rN   )ÚLeastzó
    Return the minimum expression.

    If any expression is null the return value is database-specific:
    On PostgreSQL, return the minimum not-null expression.
    On MySQL, Oracle, and SQLite, if any expression is null, return null.
    ÚLEASTc                    r0   )Nr1   z(Least must take at least two expressionsr2   r5   r   r   r   r	   š   r8   zLeast.__init__c                    rQ   )zUse the MIN function on SQLite.r,   ÚMINrS   r   r   r   r   r   Ÿ   rT   zLeast.as_sqliterU   r   r   r   r   rW   �   rV   rW   c                       s$   e Zd ZdZdZ‡ fdd„Z‡  ZS )ÚNullIfÚNULLIFr1   c                    s>   |   ¡ d }t|tƒr|jd u rtdƒ‚tƒ j||fi |¤ŽS )Nr   z2Oracle does not allow Value(None) for expression1.)r9   Ú
isinstancer   Úvaluer4   r   r   )r
   r   r   r   Úexpression1r   r   r   r'   ¨   s   zNullIf.as_oracle)r(   r)   r*   r,   Úarityr'   r-   r   r   r   r   rZ   ¤   s    rZ   N)r+   Údjango.db.models.expressionsr   r   Údjango.utils.regex_helperr   r   r.   rE   rO   rW   rZ   r   r   r   r   Ú<module>   s    ?!