wikipedia: parsing historical events.

extra/wikipedia/authors.txt

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+John Benediktsson

extra/wikipedia/summary.txt

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+Wikipedia

extra/wikipedia/wikipedia.factor

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+! Copyright (C) 2012 John Benediktsson
+! See http://factorcode.org/license.txt for BSD license
+
+USING: accessors assocs calendar colors.constants formatting
+http.client io io.styles kernel make sequences urls xml
+xml.data xml.traversal ;
+
+IN: wikipedia
+
+<PRIVATE
+
+: header. ( string -- )
+    H{ { font-size 20 } { font-style bold } } format nl ;
+
+: link ( tag -- tag/f )
+    "a" assure-name over tag-named? [ "a" deep-tag-named ] unless ;
+
+: link. ( tag -- )
+    [ deep-children>string ] [ attrs>> "href" of ] bi
+    "http://en.wikipedia.org" prepend >url H{
+        { font-name "monospace" }
+        { foreground COLOR: blue }
+    } [ write-object ] with-style ;
+
+: item. ( tag -- )
+    children>> [
+        dup tag? [
+            dup link [ link. drop ] [ children>string write ] if*
+        ] [ [ write ] unless-empty ] if
+    ] each nl ;
+
+: items. ( seq -- )
+    children-tags [ item. ] each nl ;
+
+: historical-url ( timestamp -- url )
+    [ month-name ] [ day>> ] bi
+    "http://en.wikipedia.org/wiki/%s_%s" sprintf ;
+
+: (historical-events) ( timestamp -- seq )
+    historical-url http-get nip string>xml "ul" deep-tags-named ;
+
+: items>sequence ( tag -- seq )
+    children-tags [ deep-children>string ] map ;
+
+PRIVATE>
+
+: historical-events ( timestamp -- events )
+    (historical-events) second items>sequence ;
+
+: historical-events. ( timestamp -- )
+    (historical-events) "Events" header. second items. ;
+
+: historical-births ( timestamp -- births )
+    (historical-events) third items>sequence ;
+
+: historical-births. ( timestamp -- )
+    (historical-events) "Births" header. third items. ;
+
+: historical-deaths ( timestamp -- births )
+    (historical-events) fourth items>sequence ;
+
+: historical-deaths. ( timestamp -- )
+    (historical-events) "Deaths" header. fourth items. ;