1 USING: assocs html.parser kernel math sequences strings ascii
2 arrays generalizations shuffle unicode.case namespaces make
3 splitting http sequences.lib accessors io combinators
5 IN: html.parser.analyzer
7 TUPLE: link attributes clickable ;
9 : scrape-html ( url -- vector )
10 http-get nip parse-html ;
13 [ >r + dup r> ?nth* [ 2drop f f ] unless ] [ 2drop f ] if ; inline
15 : find-relative ( seq quot n -- i elt )
16 >r over [ find drop ] dip r> swap pick
17 (find-relative) ; inline
19 : (find-all) ( n seq quot -- )
20 2dup >r >r find-from [
21 dupd 2array , 1+ r> r> (find-all)
26 : find-all ( seq quot -- alist )
27 [ 0 -rot (find-all) ] { } make ; inline
29 : (find-nth) ( offset seq quot n count -- obj )
30 >r >r [ find-from ] 2keep 4 npick [
34 >r >r >r >r drop 1+ r> r> r> r>
41 : find-nth ( seq quot n -- i elt )
42 0 -roll 0 (find-nth) ; inline
44 : find-nth-relative ( seq quot n offest -- i elt )
45 >r [ find-nth ] 3keep 2drop nip r> swap pick
46 (find-relative) ; inline
48 : remove-blank-text ( vector -- vector' )
51 text>> [ blank? ] all? not
57 : trim-text ( vector -- vector' )
60 [ [ blank? ] trim ] change-text
64 : find-by-id ( id vector -- vector )
65 [ attributes>> "id" swap at = ] with filter ;
67 : find-by-class ( id vector -- vector )
68 [ attributes>> "class" swap at = ] with filter ;
70 : find-by-name ( str vector -- vector )
72 [ name>> = ] with filter ;
74 : find-first-name ( str vector -- i/f tag/f )
76 [ name>> = ] with find ;
78 : find-matching-close ( str vector -- i/f tag/f )
80 [ [ name>> = ] keep closing?>> and ] with find ;
82 : find-by-attribute-key ( key vector -- vector )
84 [ attributes>> at ] with filter
87 : find-by-attribute-key-value ( value key vector -- vector )
89 [ attributes>> at over = ] with filter nip
92 : find-first-attribute-key-value ( value key vector -- i/f tag/f )
94 [ attributes>> at over = ] with find rot drop ;
96 : find-between* ( i/f tag/f vector -- vector )
100 [ find-matching-close drop dup [ 1+ ] when ] keep
101 swap [ head ] [ first ] if*
106 : find-between ( i/f tag/f vector -- vector )
107 find-between* dup length 3 >= [
108 [ rest-slice but-last-slice ] keep like
111 : find-between-first ( string vector -- vector' )
112 [ find-first-name ] keep find-between ;
114 : find-between-all ( vector quot -- seq )
115 [ [ [ closing?>> not ] bi and ] curry find-all ] curry
116 [ [ >r first2 r> find-between* ] curry map ] bi ;
118 : tag-link ( tag -- link/f )
119 attributes>> [ "href" swap at ] [ f ] if* ;
121 : find-links ( vector -- vector' )
122 [ [ name>> "a" = ] [ attributes>> "href" swap at ] bi and ]
125 : <link> ( vector -- link )
126 [ first attributes>> ]
127 [ [ name>> { text "img" } member? ] filter ] bi
130 : link. ( vector -- )
131 [ attributes>> "href" swap at write nl ]
132 [ clickable>> [ bl bl text>> print ] each nl ] bi ;
134 : find-by-text ( seq quot -- tag )
135 [ dup name>> text = ] prepose find drop ;
137 : find-opening-tags-by-name ( name seq -- seq )
138 [ [ name>> = ] keep closing?>> not and ] with find-all ;
140 : href-contains? ( str tag -- ? )
141 attributes>> "href" swap at* [ subseq? ] [ 2drop f ] if ;
143 : find-hrefs ( vector -- vector' )
147 [ attributes>> "href" swap key? ] bi and ] filter
148 ] map sift [ [ attributes>> "href" swap at ] map ] map concat ;
150 : find-forms ( vector -- vector' )
151 "form" over find-opening-tags-by-name
152 swap [ >r first2 r> find-between* ] curry map
153 [ [ name>> { "form" "input" } member? ] filter ] map ;
155 : find-html-objects ( string vector -- vector' )
156 [ find-opening-tags-by-name ] keep
157 [ >r first2 r> find-between* ] curry map ;
159 : form-action ( vector -- string )
160 [ name>> "form" = ] find nip
161 attributes>> "action" swap at ;
163 : hidden-form-values ( vector -- strings )
164 [ attributes>> "type" swap at "hidden" = ] filter ;
169 [ bl bl bl bl [ write "=" write ] [ write bl ] bi* nl ] assoc-each ;
171 : form. ( vector -- )
172 [ closing?>> not ] filter
175 { [ dup name>> "form" = ]
176 [ "form action: " write attributes>> "action" swap at print ] }
177 { [ dup name>> "input" = ] [ input. ] }
182 : query>assoc* ( str -- hash )
183 "?" split1 nip query>assoc ;