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(.module:
[lux (#- Name)
[abstract
[monad (#+ do)]
[equivalence (#+ Equivalence)]]
[control
["<>" parser
["<.>" xml (#+ Parser)]
["<.>" text]]]
[data
["." product]
["." text
["%" format (#+ format)]]
[number
["n" nat]]
[format
["." xml (#+ XML)]]
[collection
["." list ("#\." functor)]]]
["." time (#+ Time)
["." instant (#+ Instant)]
["." date (#+ Date)]
["." year]
["." month]]]
["." /// #_
["#." artifact (#+ Group Name Version Artifact)]])
(type: #export Metadata
{#group Group
#name Name
#versions (List Version)
#last_updated Instant})
(def: (pad value)
(-> Nat Text)
(if (n.< 10 value)
(format "0" (%.nat value))
(%.nat value)))
(def: (date_format value)
(%.Format Date)
(format (|> value date.year year.value .nat %.nat)
(|> value date.month month.number ..pad)
(|> value date.day_of_month ..pad)))
(def: (time_format value)
(%.Format Time)
(let [(^slots [#time.hour #time.minute #time.second]) (time.clock value)]
(format (..pad hour)
(..pad minute)
(..pad second))))
(def: (instant_format value)
(%.Format Instant)
(format (..date_format (instant.date value))
(..time_format (instant.time value))))
(template [<definition> <tag>]
[(def: <definition> xml.Tag ["" <tag>])]
[<group> "groupId"]
[<name> "artifactId"]
[<version> "version"]
[<versioning> "versioning"]
[<versions> "versions"]
[<last_updated> "lastUpdated"]
[<metadata> "metadata"]
)
(template [<name> <type> <tag> <pre>]
[(def: <name>
(-> <type> XML)
(|>> <pre> #xml.Text list (#xml.Node <tag> xml.attributes)))]
[write_group Group ..<group> (|>)]
[write_name Name ..<name> (|>)]
[write_version Version ..<version> (|>)]
[write_last_updated Instant ..<last_updated> ..instant_format]
)
(def: write_versions
(-> (List Version) XML)
(|>> (list\map ..write_version) (#xml.Node ..<versions> xml.attributes)))
(def: #export (write value)
(-> Metadata XML)
(#xml.Node ..<metadata>
xml.attributes
(list (..write_group (get@ #group value))
(..write_name (get@ #name value))
(#xml.Node ..<versioning>
xml.attributes
(list (..write_versions (get@ #versions value))
(..write_last_updated (get@ #last_updated value)))))))
(def: (sub tag parser)
(All [a] (-> xml.Tag (Parser a) (Parser a)))
(do <>.monad
[_ (<xml>.node tag)]
(<xml>.children parser)))
(def: (text tag)
(-> xml.Tag (Parser Text))
(..sub tag <xml>.text))
(def: date_parser
(<text>.Parser Date)
(do <>.monad
[year (<>.codec n.decimal (<text>.exactly 4 <text>.decimal))
year (<>.lift (year.year (.int year)))
month (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))
month (<>.lift (month.by_number month))
day_of_month (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))]
(<>.lift (date.date year month day_of_month))))
(def: time_parser
(<text>.Parser Time)
(do <>.monad
[hour (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))
minute (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))
second (<>.codec n.decimal (<text>.exactly 2 <text>.decimal))]
(<>.lift (time.time
{#time.hour hour
#time.minute minute
#time.second second
#time.milli_second 0}))))
(def: last_updated_parser
(Parser Instant)
(<text>.embed (do <>.monad
[date ..date_parser
time ..time_parser]
(wrap (instant.from_date_time date time)))
(..text ..<last_updated>)))
(def: #export parser
(Parser Metadata)
(<| (..sub ..<metadata>)
($_ <>.and
(<xml>.somewhere (..text ..<group>))
(<xml>.somewhere (..text ..<name>))
(<| (..sub ..<versioning>)
($_ <>.and
(<| <xml>.somewhere
(..sub ..<versions>)
(<>.many (..text ..<version>)))
(<xml>.somewhere ..last_updated_parser)
))
)))
(def: #export equivalence
(Equivalence Metadata)
($_ product.equivalence
text.equivalence
text.equivalence
(list.equivalence text.equivalence)
instant.equivalence
))
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