
    9i(                        d Z ddlmZ ddlZddlZddlZddlZddlmc m	Z
 ddlmZ ddlmZ ddlmZmZmZmZ ddlmZmZ ddlZe G d d	             Z G d
 d      ZdddZedk(  r e        yy)a  
redwing_scraper.py
-------------------

This script crawls the public Red Wing Shoes website to discover product pages
and extract the current selling price for each style.  It starts from the
``sitemap_index.xml`` advertised in the site's ``robots.txt`` and follows
each sitemap entry looking for product pages (anything ending in a ``.html``
with a numeric style code).  For every discovered product page the script
downloads the HTML, scans for the first occurrence of ``"Current Price:"``
and the associated dollar amount, and pairs it with the style number found in
the page.  The results are written to a Markdown file (``Prices.md``) with
two columns: ``Style #`` and ``Price``.

Usage:
    python RW_Site_Scraper-Prices.py

The script outputs ``Prices.md`` next to this script by default.  You can
optionally set the output filename with the ``--output`` argument and the
sitemap URL with ``--sitemap-url``.  A polite delay between requests
ensures that the crawler does not overwhelm the server.

Note:
    This scraper uses only publicly available endpoints and does not attempt
    to bypass access controls or interact with a shopping cart.  Ensure you
    comply with the site's terms of service and adjust the request rate via
    the ``--delay`` parameter if necessary.
    )annotationsN)	dataclass)Path)IterableIteratorListOptional)urljoinurlparsec                  .    e Zd ZU dZded<   ded<   ddZy)ProductPricez>Simple structure to hold a product style number and its price.strstyle_numberpricec                <    d| j                    d| j                   dS )z+Return the product as a Markdown table row.|z|$)r   r   )selfs    'Boot_Features/RW_Site_Scraper-Prices.pyto_markdown_rowzProductPrice.to_markdown_row4   s"    4$$%R

|155    N)returnr   )__name__
__module____qualname____doc____annotations__r    r   r   r   r   -   s    HJ6r   r   c                     e Zd ZdZ ej
                  dej                        Z ej
                  dej                        Z ej
                  dej                        Z	 ej
                  dej                         ej
                  dej                         ej
                  dej                         ej
                  dej                        gZ
ddd
ZddZedd       ZddZddZdddZ	 d	 	 	 	 	 ddZedd       Zy	)RedWingScraperz7A helper class to scrape Red Wing Shoes product prices.z%(?:-|/)([0-9]{3,6})\.html(?:[?#].*)?$z=href=["\']([^"\']*(?:-|/)[0-9]{3,6}\.html(?:\?[^"\']*)?)["\']z>(?:style(?:\s*(?:#|number))?[:\s\"'>]*|sku[:\s\"'>]*)(\d{3,6})zLitemprop=[\"']price[\"'][^>]{0,120}content=[\"']([0-9]+(?:\.[0-9]{2})?)[\"']z,Current\s+Price:\s*\$([0-9]+(?:\.[0-9]{2})?)z/price-sales[^$]{0,120}\$([0-9]+(?:\.[0-9]{2})?)z-\"price\"\s*:\s*\"?([0-9]+(?:\.[0-9]{2})?)\"?Nc                    |xs t        j                         | _        | j                  j                  j	                  ddd       y )Nz_Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120 Safari/537.36zen-US,en;q=0.9)z
User-AgentzAccept-Language)requestsSessionsessionheadersupdate)r   r#   s     r   __init__zRedWingScraper.__init__J   s>    4("2"2"4##/ $4		
r   c                F   d}t        d      D ]=  }	 | j                  j                  |d      }|j                          |j                  c S  ||t        d|       # t
        j                  $ r-}|}|dk  r t        j                  d|dz   z         Y d}~ d}~ww xY w)	z<Download a URL and return its text, raising for HTTP errors.N      )timeout   g?   zFailed to fetch URL: )
ranger#   getraise_for_statustextr!   RequestExceptiontimesleepRuntimeError)r   urllast_excattemptrespexcs         r   
fetch_textzRedWingScraper.fetch_textX   s    (,Qx 
	G	||''R'8%%'yy 	
	 N23%899 ,, Q;JJsgk23s   8A  B 3"BBB c                   	 t        |       j                  xs dj                         }|j	                         t        j                  d|t
        j                        }|s>t        j                  d|t
        j                        }|syt        fddD              sy|j                  d      S # t        $ r | }Y w xY w)z3Extract style number from modern Red Wing PDP URLs. z-(\d{3,6})\.html$)flagsz/(\d{3,6})\.html$c              3  &   K   | ]  }|v  
 y wNr   ).0tokenpath_ls     r   	<genexpr>z8RedWingScraper.extract_style_from_url.<locals>.<genexpr>y   s      $)s   )z/mens/z/womens/z/work/z
/heritage/z/accessories/z/worx/r,   )
r   pathstrip	Exceptionlowerresearch
IGNORECASEanygroup)r5   rD   mrB   s      @r   extract_style_from_urlz%RedWingScraper.extract_style_from_urlj   s    	SM&&,"335D II*DF		.BMMJA -v  wwqz  	D	s   'B1 1B?>B?c                   t        j                  |      }g }|j                         D ]T  }|j                  j	                  d      s|j
                  s,|j                  |j
                  j                                V |S )z=Extract a list of ``loc`` values from a sitemap XML document.loc)ET
fromstringitertagendswithr0   appendrE   )r   xml_textrootlocselems        r   parse_sitemapzRedWingScraper.parse_sitemap   s`    }}X&IIK 	/Dxx  'DIIDIIOO-.	/ r   c              #     K   	  j                  |      } j                  |      }t               }t               d fd}|D ]  }|j	                         j                  d      s#	  j                  |      } j                  |      }|D ];  }	 ||	      D ]  }
|
  |	j                  d      s&d|	v s+|j                  |	       =  t        |      D ]w  }	  j                  |      } j                  j                  |      D ]E  }|j                  d      xs dj                         }|s)t        ||      } ||      D ]  }
|
  G y y# t        $ r Y yw xY w# t        $ r Y )w xY w# t        $ r Y w xY ww)	z
        Iterate through all sitemaps listed in the ``sitemap_index_url`` and
        yield URLs that look like product pages (based on numeric style).
        Nc              3  j   K   j                  |       }|sy | v ry j                  |        |  y wr?   )rN   add)raw_urlstyler   yieldeds     r   _yield_if_productz;RedWingScraper.iter_product_urls.<locals>._yield_if_product   s9     //8E'!KK Ms   03z.xml/zredwingshoes.comr,   r<   )r_   r   r   Iterator[str])r:   rF   r[   setrG   rU   r^   sortedPDP_HREF_REfinditerrL   rE   r
   )r   sitemap_index_url	index_xmlsitemap_urlslisting_urlsrb   sitemap_urlsm_xmlurlsr5   plist_urlpagerM   hrefabs_urlra   s   `               @r   iter_product_urlsz RedWingScraper.iter_product_urls   s    
	(9:I )))4!$E	 ( 	*K$$&//75 %%f-D **3/ AG<<$);s)B $$S)	*	*  |, 	Hx0 %%..t4 
(b//1!(D1*73 AG	?  		*    s}   FE AF)E":8F3F8#FE2-A&F	EFEF"	E/+F.E//F2	E>;F=E>>Fc                   d}| j                   j                  |      }|r|j                  d      }|s| j                  |      }d}| j                  D ](  }|j                  |      }|s|j                  d      } n |r|syt        ||      S )z>Extract the style number and price from a product page's HTML.r<   r,   N)STYLE_RErI   rL   rN   PRICE_PATTERNSr   )r   htmlr5   r`   style_matchr   patrM   s           r   extract_price_and_stylez&RedWingScraper.extract_price_and_style   s    mm**40%%a(E//4E&& 	C

4 A
		 EE5))r   c                   g }t               }t               }| j                  |      D ]  }||v r|j                  |       	 | j                  |      }| j                  ||      }|r;|j                  |v rN|j                  |j                         |j                  |       t        j                  |        |S # t        $ r Y w xY w)z:Scrape all product pages discovered via the sitemap index.)
re   ru   r^   r:   rF   r|   r   rV   r2   r3   )	r   ri   delayresultsseenseen_stylesproduct_urlry   products	            r   scrape_all_productsz"RedWingScraper.scrape_all_products   s     ') #112CD 	Kd"HH[!{3 224EG'';6 4 45w'JJu	    s   B;;	CCc                    t        |dd      5 }|j                  d       |j                  d       | D ]$  }|j                  |j                         dz          & 	 ddd       y# 1 sw Y   yxY w)z6Write the products to a Markdown file in table format.wzutf-8)encodingz|Style #|Price|
z
|---|---|

N)openwriter   )productsrD   mdr   s       r   write_markdownzRedWingScraper.write_markdown   si     $g. 	;"HH()HH]## ;002T9:;	; 	; 	;s   AA%%A.r?   )r#   zOptional[requests.Session]r   None)r5   r   r   r   )rW   r   r   z	List[str])ri   r   r   rd   )r<   )ry   r   r5   r   r   zOptional[ProductPrice])      ?)ri   r   r~   floatr   zList[ProductPrice])r   zIterable[ProductPrice]rD   r   r   r   )r   r   r   r   rH   compilerJ   PRODUCT_PAGE_RErg   rw   rx   r&   r:   staticmethodrN   r[   ru   r|   r   r   r   r   r   r   r   9   s   A !bjj!I2==YO"**]_a_l_lmKrzzI
H
 	

bdfdqdqr

BBMMR

Er}}U

CR]]S	N
:$  (1f*.   
	6 ; ;r   r   c                   t        j                  d      }|j                  ddd       |j                  ddd	       |j                  d
t        dd       |j	                  |       }t               }t        d|j                   dt        j                         |j                  |j                  |j                        }t        dt        |       dt        j                         |j                  r#t        |j                        j                         n)t        t               j#                         j$                  dz  }|j'                  |t)        |             t        d|        y )NzScrape Red Wing Shoes prices)descriptionz--sitemap-urlz.https://www.redwingshoes.com/sitemap_index.xmlz*URL of the sitemap index to start crawling)defaulthelpz--outputr<   zOutput Markdown filenamez--delayr   z!Delay between requests in seconds)typer   r   zDiscovering products from u    …)file)r~   zFound z products with prices.z	Prices.mdzWrote price table to )argparseArgumentParseradd_argumentr   
parse_argsr   printrm   sysstderrr   r~   lenoutputr   
expanduser__file__resolveparentr   r   )argvparserargsscraperr   out_paths         r   mainr      s6   $$1OPF
@9  
 
B5OP
0	   T"DG	&t'7'7&8
=CJJO**4+;+;4::*NH	F3x=/!7
8szzJ15tDKK ++-4>CYCYC[CbCbepCpH8S]3	!(
,-r   __main__r?   )r   zOptional[List[str]]r   r   )r   
__future__r   r   rH   r   r2   xml.etree.ElementTreeetreeElementTreerQ   dataclassesr   pathlibr   typingr   r   r   r	   urllib.parser
   r   r!   r   r   r   r   r   r   r   <module>r      sr   : #  	 
  " " !  5 5 *  6 6 6y; y;x.2 zF r   