
    Wi9,                        S r SSKrSSKrSSKrSSKrSSKrSSKrSSKrSSKrSSK	r	SSK
Jr  \" S5      r\S-  r\S-  rSrS\S	\4S
 jrS\S	\S-  4S jrS\S	\S-  4S jrS\S	\S-  4S jrS\S	\S-  4S jr " S S\R.                  R0                  5      rS\S	\S-  4S jrS\S	\\\4   4S jrS\S	\4S jrS\S	\4S jrS\S	\4S jr S r!\"S:X  a  \!" 5         gg)u  
Extract text from a PDF or EPUB file for book-to-skill processing.

PDF extraction tries methods in order:
  1. pdftotext (poppler-utils) — best quality
  2. PyPDF2 — common Python library
  3. pdfminer.six — thorough fallback

EPUB extraction tries methods in order:
  1. ebooklib + BeautifulSoup4 — best quality
  2. zipfile + html.parser — stdlib fallback (no extra deps)

Outputs:
  /tmp/book_skill_work/full_text.txt  — full extracted text
  /tmp/book_skill_work/metadata.json  — stats and metadata
    N)Pathz/tmp/book_skill_workzfull_text.txtzmetadata.jsong      ?textreturnc                 T    [        [        U R                  5       5      [        -  5      $ N)intlensplitWORDS_PER_TOKEN)r   s    scripts/extract.pyestimate_tokensr   %   s    s4::< ?233    pdf_pathc                 
   [         R                  " S5      (       d  g  [        R                  " SSU S/SSSS9nUR                  S:X  a+  UR
                  R                  5       (       a  UR
                  $ g ! [         a     g f = f)N	pdftotextz-layout-Tx   capture_outputr   timeoutr   )shutilwhich
subprocessrun
returncodestdoutstrip	Exception)r   results     r   extract_with_pdftotextr    )   s    <<$$)Xs3dC
 !fmm&9&9&;&;==    s   AA5 5
BBc                     SS K n/ n[        U S5       nUR                  U5      nUR                   H,  n UR	                  UR                  5       =(       d    S5        M.     S S S 5        SR                  U5      $ ! [         a    UR	                  S5         Mg  f = f! , (       d  f       NA= f! [         a     g [         a     g f = f)Nr   rb 
)	PyPDF2open	PdfReaderpagesappendextract_textr   joinImportError)r   r%   
text_partsfreaderpages         r   extract_with_pypdf2r1   8   s    
(D!Q%%a(F*%%d&7&7&9&?R@ % " yy$$ ! *%%b)* "!   sQ   B. !B(A;B"B. ;BBBB
B+'B. .
C:	CCc                 V     SSK Jn  U" U 5      $ ! [         a     g [         a     g f = f)Nr   )r*   )pdfminer.high_levelr*   r,   r   )r   r*   s     r   extract_with_pdfminerr4   J   s2    4H%%  s    
(	((	epub_pathc                 P    SS K nSSK Jn  SSKJn  UR	                  U 5      n/ nUR                  UR                  5       H8  nU" UR                  5       S5      nUR                  UR                  SS95        M:     SR                  U5      $ ! [         a     g [         a     g f = f)Nr   )epub)BeautifulSoupzhtml.parserr$   )	separator

)ebooklibr7   bs4r8   	read_epubget_items_of_typeITEM_DOCUMENTget_contentr)   get_textr+   r,   r   )r5   r;   r7   r8   bookpartsitemsoups           r   extract_with_ebooklibrF   T   s    !%~~i(**8+A+ABD !1!1!3]CDLL67 C {{5!!  s   B
B 
B%	B%$B%c                   T   ^  \ rS rSrSr1 SkrU 4S jrS rS rS r	S\
4S	 jrS
rU =r$ )_HTMLTextExtractorf   u8   Minimal HTML → plain text converter using stdlib only.>   headstylescriptc                 L   > [         TU ]  5         / U l        SU l        S U l        g )Nr   )super__init___parts_skip_depth_current_skip)self	__class__s    r   rO   _HTMLTextExtractor.__init__k   s%    !#)-r   c                     XR                   ;   a  U =R                  S-  sl        US;   a  U R                  R                  S5        g g )N   )
pbrh1h2h3h4h5h6lidivr$   )	SKIP_TAGSrQ   rP   r)   )rS   tagattrss      r   handle_starttag"_HTMLTextExtractor.handle_starttagq   s>    .. !NNKKt$ Or   c                 r    XR                   ;   a(  U R                  (       a  U =R                  S-  sl        g g g )NrW   )rb   rQ   )rS   rc   s     r   handle_endtag _HTMLTextExtractor.handle_endtagw   s-    .. T%5%5! &6 r   c                 ^    U R                   (       d  U R                  R                  U5        g g r   )rQ   rP   r)   )rS   datas     r   handle_data_HTMLTextExtractor.handle_data{   s"    KKt$  r   r   c                 `    [         R                  " SR                  U R                  5      5      $ )Nr#   )htmlunescaper+   rP   )rS   s    r   rA   _HTMLTextExtractor.get_text   s    }}RWWT[[122r   )rR   rP   rQ   )__name__
__module____qualname____firstlineno____doc__rb   rO   re   rh   rl   strrA   __static_attributes____classcell__)rT   s   @r   rH   rH   f   s0    B+I.%"%3# 3 3r   rH   c                     [         R                  " U 5       nUR                  5       n/ nU Vs/ sH  oDR                  S5      (       d  M  UPM     nnU(       a9  UR	                  US   5      R                  SSS9n[        R                  " SU5      nU=(       d    [        S U 5       5      nU(       d
   SSS5        g/ nU H]  n	 UR	                  U	5      R                  SSS9n
[        5       nUR                  U
5        UR                  UR                  5       5        M_     U(       a  S	R                  U5      OSsSSS5        $ s  snf ! [         a     M  f = f! , (       d  f       g= f! [         a     gf = f)
u7   stdlib-only EPUB extractor: unzip → parse HTML files..opfr   utf-8replaceerrorsz(href=["\']([^"\']+\.(?:xhtml|html))["\']c              3   R   #    U H  oR                  S 5      (       d  M  Uv   M      g7f))z.htmlz.xhtmlN)endswith).0ns     r   	<genexpr>'extract_with_zipfile.<locals>.<genexpr>   s      / aJJ/B$C5s   '	'Nr:   )zipfileZipFilenamelistr   readdecoderefindallsortedrH   feedr)   rA   r   r+   )r5   zfnamesspine_orderr   	opf_filesopf_text
html_filesrC   namerawparsers               r   extract_with_zipfiler      sQ   __Y'2KKME%'K$)@EqZZ-?EI@779Q<077	7R jj)TV^_$  / / )J  (' E"''$-..wy.IC/1FKK$LL!23 # */6;;u%D1 (' A$ ! - ('2  sw   E. EEEA%E6E. ?EAE E=	E. E
EEEE
E+'E. +E. .
E;:E;c                    [        SSSS9  [        U 5      nU(       a$  UR                  5       (       a  [        S5        US4$ [        S5        [        SSSS9  [        U 5      nU(       a$  UR                  5       (       a  [        S5        US	4$ [        S
5        [        S[        R
                  S9  [        R                  " S5        g)z'Return (text, method) for an EPUB file.z#Trying ebooklib + BeautifulSoup4... TendflushOKr;   not availablezTrying stdlib zipfile parser...r   FAILEDz
ERROR: Could not extract text from EPUB.
Install ebooklib + beautifulsoup4 for best results:
  pip3 install ebooklib beautifulsoup4filerW   N)printrF   r   r   sysstderrexit)r5   r   s     r   extract_epubr      s    	
/SE +D

dZ	/	
+DA	*D

dY	(O		1 ZZ	 HHQKr   c                     [         R                  " U 5       nUR                  5        Vs/ sH  o"R                  S5      (       d  M  UPM     nnU(       d
   SSS5        gUR	                  US   5      R                  SSS9n[        [        R                  " SU5      5      sSSS5        $ s  snf ! , (       d  f       g= f! [         a     gf = f)zCCount spine items (approximate chapter count) without dependencies.r{   Nr   r|   r}   r~   z
<itemref\b)
r   r   r   r   r   r   r	   r   r   r   )r5   r   r   r   r   s        r   count_epub_chaptersr      s    __Y'2$&KKMHMqZZ5GMIH (' wwy|,33GI3NHrzz-:; ('H ('  sR   C B0B+B+
B0C  AB0!	C +B00
B>:C >C 
CCc                    [         R                  " S5      (       a~   [        R                  " SU /SSSS9nUR                  R                  5        HF  nUR                  S5      (       d  M  [        UR                  S5      S   R                  5       5      s  $     SS Kn[        U S	5       n[        UR                  U5      R                  5      sS S S 5        $ ! [         a     NKf = f! , (       d  f       g = f! [         a     gf = f)
NpdfinfoT   r   zPages::rW   r   r"   )r   r   r   r   r   
splitlines
startswithr   r
   r   r   r%   r&   r	   r'   r(   )r   r   liner%   r.   s        r   count_pagesr      s    ||I	^^H%drF 002??8,,tzz#q1779:: 3(D!Qv''*001 "!  		
 "! sN   A
C +,C C C: +$C)	C: 
C&%C&)
C73C: 7C: :
DDc                 8  ^  SSK nT SS R                  5       nUR                  " SUR                  5      nU Vs/ sH*  oCR	                  U5      (       d  M  UR                  5       PM,     nn/ SQn[        U 4S jU 5       5      n[        U5      USS US.$ s  snf )	z4Detect chapter count and table of contents presence.r   NiP  z:^\s*(chapter\s+\d+|CHAPTER\s+\d+|ch\.\s*\d+|\d+\.\s+[A-Z]))ztable of contentscontentsu   índiceu   sumárioc              3   L   >#    U H  oTS S R                  5       ;   v   M     g 7f)Ni  )lower)r   kwr   s     r   r   #detect_structure.<locals>.<genexpr>   s#     ClUd))++ls   !$
   )chapters_detectedchapter_headings_samplehas_toc)r   r   compile
IGNORECASEmatchr   anyr	   )r   r   lineschapter_patternlchapters_foundtoc_keywordsr   s   `       r   detect_structurer      s    %L##%E jjE
O */KA2G2G2JiaggiNK LLClCCG !0#1#2#6  Ls   BBc                     [        [        R                  5      S:  a.  [        S[        R                  S9  [        R
                  " S5        [        R                  S   n [        R                  R                  U 5      (       d1  [        SU  3[        R                  S9  [        R
                  " S5        [        U 5      R                  R                  5       nUS:H  nUS:H  nU(       dw  U(       dp  [        U S5       nUR                  S	5      nS S S 5        WS S
 S:X  a  SnO>US S S:X  a  SnO2[        SU S3[        R                  S9  [        R
                  " S5        [        R                  SSS9  U(       a)  [        SU  35        [!        U 5      u  pg[#        U 5      nSn	O[        SU  35        [        SSSS9  [%        U 5      nU(       a  Sn[        S5        O[        S5        [        SSSS9  ['        U 5      nU(       a  Sn[        S5        Oo[        S5        [        SSSS9  [)        U 5      nU(       a  Sn[        S5        O9[        S5        [        S[        R                  S9  [        R
                  " S5        [+        U 5      nS n	[,        R/                  US!S"9  [1        U5      n
[3        U5      n[        R                  R5                  U 5      S#-  nS$[7        [        U 5      R9                  5       5      S%[        U 5      R:                  S&U(       a  S'OS(S)WS*[=        US5      XS+[        U5      S,[        UR?                  5       5      S-U
S.S/U
S0-   S13S2[7        [,        5      0UEn[@        R/                  [B        RD                  " USS3S495        S5U(       a  S6OS7 S8U 3n[        S95        [        S:U(       a  S;OS< 35        [        S=U 35        [        U5        [        S>[        UR?                  5       5      S? 35        [        S@U
S0-   S135        [        SAUSB    SC35        [        SDUSE   (       a  SFOSG 35        [        SH[,         35        [        SI[@         35        g ! , (       d  f       GNe= f)JN   z'Usage: extract.py <path-to-pdf-or-epub>r   rW   zERROR: File not found: z.epubz.pdfr"         s   %PDFTs   PKzERROR: Unsupported format 'z'. Supported: .pdf, .epub)parentsexist_okzExtracting EPUB: spine_itemszExtracting PDF: zTrying pdftotext...r   r   r   r   r   zTrying PyPDF2...r%   zTrying pdfminer.six...pdfminerr   z
ERROR: Could not extract text from PDF.
Install one of: poppler-utils (pdftotext), PyPDF2, or pdfminer.six
  sudo apt install poppler-utils
  pip3 install PyPDF2
  pip3 install pdfminer.sixr(   r|   )encodingi   source_filefilenameformatr7   pdfextraction_methodfile_size_mbcharswordsestimated_tokensestimated_tokens_human~i  Koutput_textF)indentensure_asciiz   zSpine itemsPagesz: u   
📖 Extraction complete:z   Format  : EPUBPDFz   Method  : z   Words   : ,z   Tokens  : ~z   Chapters: r   z	 detectedz   ToC     : r   yesznot detectedu   
   Text → u      Meta → )#r	   r   argvr   r   r   ospathexistsr   suffixr   r&   r   
OUTPUT_DIRmkdirr   r   r    r1   r4   r   OUTPUT_TEXT
write_textr   r   getsizerw   resolver   roundr
   OUTPUT_METAjsondumps)
input_pathextis_epubis_pdfr.   headerr   methodr(   pages_labeltokens	structurer   metadata	page_lines                  r   mainr      s   
388}q7cjjI!J77>>*%%'
|43::F
z

!
!
'
'
)CWnGF]F6*d#qVVAYF $"1: FBQZ5 G-cU2KLZZ HHQKTD1!*./#J/#J/# -.#D9%j1 F$K/"$#T:&z2D!do&.CtD,Z8'F$K(O6
 !ZZ HHQKJ' 4'2T"F &I77??:.+>L 	s4
+3356D$))G&VlA.TTZZ\"F Afn%5Q"7s;' H 4::hquMNwmG<BugFI	')	MG&7
89	M&
"#	)	M#djjl+A.
/0	N6T>*!
,-	M)$789
CD	M9Y#7%^L
MN	N;-
()	L
&'w $#s   ;Q++
Q:__main__)#rv   ro   html.parserr   r   r   r   r   r   r   pathlibr   r   r   r   r   rw   r   r   r    r1   r4   rF   r   
HTMLParserrH   r   tupler   r   r   dictr   r   rr    r   r   <module>r     sZ  "    	 	   
  ()
?*?*4# 4# 4S S4Z # #* $C C$J S S4Z $3// 3:C C$J @C E#s(O 2
3 
3 
# # *3 4 .l(^ zF r   