
    Sh                        d Z ddlZddlZddlmZ ddlZddlZddlZddlmZm	Z	 de
fdZdedz  de
fd	Zd
e
de
fdZdede
fdZde
defdZde
de
fdZde
de
fdZde
de
dz  fdZde
dede
fdZde
dede
fdZde
dee
ef   dz  fdZy)a  
helpers.py

Purpose:
  Miscellaneous utilities reused across routes:
    - Timestamp parsing from camera filenames
    - Human-readable formatting
    - Normalization of paths into the `static/User-photos` namespace

Exports:
  - parse_ts_from_any(path_or_name) -> (datetime|None, camera_id|None)
  - format_dt(datetime|None) -> str
  - normalize_to_static_user_photos(path: str) -> str
    N)datetime)current_appurl_forpath_or_namec           
      @   t         j                  j                  |       }t        j                  d|t        j
                        }|sy|j                         \  }}}}}}}		 t        |      }
t        |      }t        t        |      ||
t        |      t        |      t        |            }||	fS # t        $ r Y nw xY w	 t        |      }t        |      }
t        t        |      ||
t        |      t        |      t        |            }||	fS # t        $ r d |	fcY S w xY w)NzBPICT_(\d{4})(\d{2})(\d{2})_(\d{2})(\d{2})(\d{2})_([A-Za-z0-9]{12}))NN)
ospathbasenamerematch
IGNORECASEgroupsintr   
ValueError)r   namemyearabhhmmsscamdaymonthtss                FC:\Users\algun\Documents\ceba web\Ceba - Github\app_modules\helpers.pyparse_ts_from_anyr      s   77L)D
VX\^`^k^klA"#((*D!QBC!fc!fec$iSWc"gs2wG3w Ac!fc$iSWc"gs2wG3w Sys&   !AB/ /	B;:B;?AD DDdtreturnc                 *    | sy| j                  d      S )NzNema aktivnostiz%d.%m.%Y %H:%M)strftime)r   s    r   	format_dtr#   /   s     ;;'((    r	   c                     | sy| j                  dd      j                  d      }|j                  d      r|t        d      d  }d|v r||j	                  d      d  }|S d|vrd| }|S )NzUser-photos/\/zstatic/)replacelstrip
startswithlenfind)r	   ps     r   normalize_to_static_user_photosr.   5   s    T3&&s+A||Ic)n aff^$&( H 
A1#Hr$   datac                 h    t        j                  |       j                  d      j                  d      S )Nutf-8=)base64urlsafe_b64encodedecoderstrip)r/   s    r   _b64url_encoder7   D   s)    ##D)009@@EEr$   c                 V    dt        |        dz  z  }t        j                  | |z         S )Nr2      )r+   r3   urlsafe_b64decode)r/   paddings     r   _b64url_decoder<   H   s+    c$iZ!^$G##D7N33r$   rel_pathc                 P   t        |       }t        j                  j                  d      xs dj	                  d      }t        j                  ||j	                  d      t        j                        j                         }t        |j	                  d             dt        |       S )zCreate a deterministic signed token for a relative path under User-photos.
    Token format: base64url(rel) + '.' + base64url(HMAC_SHA256(secret, rel))
    No expiry (stable), access still requires auth + ownership in the serving route.
    
SECRET_KEY r1   .)r.   r   configgetencodehmacnewhashlibsha256digestr7   )r=   relsecretmacs       r   generate_media_tokenrM   M   s    
 *(
3C  $$\28b@@IF
((63::g.
?
F
F
HCSZZ012!N34G3HIIr$   c                 2    t        |       }t        d|      S )Nmedia_routes.media_get)token)rM   r   )r=   rP   s     r   build_media_urlrQ   X   s     *E+599r$   rP   c                    	 | j                  dd      \  }}t        |      j                  d      }t        |      }t        j
                  j                  d      xs dj                  d      }t        j                  ||j                  d      t        j                        j                         }t        |      }t        j                  ||      sy|S # t        $ r Y yw xY w)zMVerify a media token and return normalized relative path, or None if invalid.rA      r1   r?   r@   N)splitr<   r5   r.   r   rB   rC   rD   rE   rF   rG   rH   rI   compare_digest	Exception)rP   b64_relb64_macrJ   rK   expectedprovideds          r   resolve_media_tokenr[   ]   s     ;;sA.W%,,W5-c2$$((6<"DDWM88FCJJw$7HOOQ!'*""8X6
 s   CC C 	C C expires_at_epochc                    t        |       }t        j                  j                  d      xs dj	                  d      }| dt        |       dj	                  d      }t        j                  ||t        j                        j                         }t        |j	                  d             dt        |       dt        |       S )zCreate an expiring token that can be used publicly without a session.
    Format: base64url(rel) + "." + str(exp) + "." + base64url(HMAC(secret, rel|exp|public))
    r?   r@   r1   ||publicrA   )r.   r   rB   rC   rD   r   rE   rF   rG   rH   rI   r7   )r=   r\   rJ   rK   msgrL   s         r   generate_share_tokenra   o   s     *(
3C  $$\28b@@IFE3'()
1
8
8
AC
((63
/
6
6
8CSZZ012!C8H4I3J!N[^L_K`aar$   c                 6    t        | |      }t        d|d      S )NrO   T)rP   	_external)ra   r   )r=   r\   rP   s      r   build_share_urlrd   z   s     +;<E+5DIIr$   c                    	 | j                  dd      \  }}}t        |      j                  d      }t        |      }t	        |      }t
        j                  j                  d      xs dj                  d      }| d| dj                  d      }t        j                  ||t        j                        j                         }t        |      }	t        j                  ||	      sy||fS # t        $ r Y yw xY w)	z>Verify a share token and return (rel, exp) or None if invalid.rA      r1   r?   r@   r^   r_   N)rT   r<   r5   r.   r   r   rB   rC   rD   rE   rF   rG   rH   rI   rU   rV   )
rP   rW   exp_srX   rJ   exprK   r`   rY   rZ   s
             r   resolve_share_tokenri      s    "'++c1"5W%,,W5-c2%j$$((6<"DDWMQse7#**7388FC8??A!'*""8X6Cx s   C#C* &C* *	C65C6)__doc__r   r   r   r3   rE   rG   flaskr   r   strr   r#   r.   bytesr7   r<   rM   rQ   r[   r   ra   rd   tupleri    r$   r   <module>rp      s   
 	     &C ,)(4- )C )
# 
# 
F F3 F4 4 4
J3 J3 J:c :c :
s sTz $b3 b# b# bJc JS JS J
s uS#X'= r$   