! Copyright (C) 2009 Doug Coleman.
! See http://factorcode.org/license.txt for BSD license.
-USING: combinators combinators.smart io.encodings.utf8 io.files
-kernel namespaces sequences splitting unicode.case accessors
-math.parser calendar memoize fry ;
+USING: accessors assocs combinators combinators.short-circuit
+combinators.smart fry io.encodings.utf8 io.files kernel
+math.parser math.statistics memoize namespaces sequences
+splitting unicode.case ;
IN: zoneinfo
CONSTANT: zoneinfo-paths
MEMO: zoneinfo-files ( -- seq )
zoneinfo-paths [ parse-zoneinfo-file ] map ;
+
+MEMO: zoneinfo-array ( -- seq )
+ zoneinfo-files concat ;
+
+
+: raw-rule-map ( -- assoc )
+ zoneinfo-array [ raw-rule? ] filter [ name>> ] collect-by ;
+
+: raw-zone-map ( -- assoc )
+ zoneinfo-array [ raw-zone? ] filter [ name>> ] collect-by ;
GENERIC: zone-matches? ( string rule -- ? )
M: raw-link zone-matches? from>> = ;
M: raw-leap zone-matches? 2drop f ;
-: find-timezone-rules ( string -- seq )
- [ zoneinfo-files ] dip '[
- [ [ _ ] dip zone-matches? ] filter
- ] map concat sift ;
+: find-rules ( string -- rules )
+ raw-rule-map
+ [ [ to>> "max" = ] filter ] assoc-map at ;
+
+ERROR: zone-not-found name ;
+
+: find-zone ( string -- rules )
+ raw-zone-map
+ [ last ] assoc-map ?at [ zone-not-found ] unless ;
-: find-applicable-rules ( string -- seq )
- find-timezone-rules [ until>> empty? ] filter ;
+: find-zone-rules ( string -- zone rules )
+ find-zone dup rules/save>> find-rules ;
+! "Europe/Helsinki" find-zone-rules
! Rule
! name - string