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(;module:
lux
(lux (control monoid
eq
[order]
monad
codec
hash)
(data (coll [list])
maybe)))
## [Functions]
(def: #export (size x)
(-> Text Nat)
[(_lux_proc ["text" "size"] [x])])
(def: #export (nth idx input)
(-> Nat Text (Maybe Char))
(_lux_proc ["text" "char"] [input idx]))
(def: #export (contains? sub text)
(-> Text Text Bool)
(_lux_proc ["text" "contains?"] [text sub]))
(do-template [<name> <proc>]
[(def: #export (<name> input)
(-> Text Text)
(_lux_proc ["text" <proc>] [input]))]
[lower-case "lower-case"]
[upper-case "upper-case"]
[trim "trim"]
)
(def: #export (clip from to input)
(-> Nat Nat Text (Maybe Text))
(_lux_proc ["text" "clip"] [input from to]))
(def: #export (clip' from input)
(-> Nat Text (Maybe Text))
(clip from (size input) input))
(def: #export (replace-all pattern value template)
(-> Text Text Text Text)
(_lux_proc ["text" "replace-all"] [template pattern value]))
(do-template [<general> <common> <proc> <start>]
[(def: #export (<common> pattern input)
(-> Text Text (Maybe Nat))
(_lux_proc ["text" <proc>] [input pattern <start>]))
(def: #export (<general> pattern from input)
(-> Text Nat Text (Maybe Nat))
(_lux_proc ["text" <proc>] [input pattern from]))]
[index-of index-of' "index" +0]
[last-index-of last-index-of' "last-index" (size input)]
)
(def: #export (starts-with? prefix x)
(-> Text Text Bool)
(case (index-of' prefix x)
(#;Some +0)
true
_
false))
(def: #export (ends-with? postfix x)
(-> Text Text Bool)
(case (last-index-of' postfix x)
(#;Some n)
(n.= (size x)
(n.+ (size postfix) n))
_
false))
(def: #export (split at x)
(-> Nat Text (Maybe [Text Text]))
(case [(clip +0 at x) (clip' at x)]
[(#;Some pre) (#;Some post)]
(#;Some [pre post])
_
#;None))
(def: #export (split-with token sample)
(-> Text Text (Maybe [Text Text]))
(do Monad<Maybe>
[index (index-of' token sample)
[pre post'] (split index sample)
[_ post] (split (size token) post')]
(wrap [pre post])))
(def: #export (split-all-with token sample)
(-> Text Text (List Text))
(case (split-with token sample)
(#;Some [pre post])
(#;Cons pre (split-all-with token post))
#;None
(#;Cons sample #;Nil)))
(def: #export split-lines
(split-all-with "\n"))
## [Structures]
(struct: #export _ (Eq Text)
(def: (= test subject)
(_lux_proc ["text" "="] [subject test])))
(struct: #export _ (order;Order Text)
(def: eq Eq<Text>)
(def: (< test subject)
(_lux_proc ["text" "<"] [subject test]))
(def: (<= test subject)
(or (_lux_proc ["text" "<"] [subject test])
(_lux_proc ["text" "="] [subject test])))
(def: (> test subject)
(_lux_proc ["text" "<"] [test subject]))
(def: (>= test subject)
(or (_lux_proc ["text" "<"] [test subject])
(_lux_proc ["text" "="] [test subject])))
)
(struct: #export _ (Monoid Text)
(def: unit "")
(def: (append left right)
(_lux_proc ["text" "append"] [left right])))
(open Monoid<Text>)
(struct: #export _ (Codec Text Text)
(def: (encode original)
(let [escaped (|> original
(replace-all "\\" "\\\\")
(replace-all "\t" "\\t")
(replace-all "\v" "\\v")
(replace-all "\b" "\\b")
(replace-all "\n" "\\n")
(replace-all "\r" "\\r")
(replace-all "\f" "\\f")
(replace-all "\"" "\\\"")
)]
($_ append "\"" escaped "\"")))
(def: (decode input)
(if (and (starts-with? "\"" input)
(ends-with? "\"" input))
(case (clip +1 (n.dec (size input)) input)
(#;Some input')
(|> input'
(replace-all "\\\\" "\\")
(replace-all "\\t" "\t")
(replace-all "\\v" "\v")
(replace-all "\\b" "\b")
(replace-all "\\n" "\n")
(replace-all "\\r" "\r")
(replace-all "\\f" "\f")
(replace-all "\\\"" "\"")
#;Some)
#;None
(#;Left "Couldn't decode text"))
(#;Left "Couldn't decode text"))))
(struct: #export _ (Hash Text)
(def: eq Eq<Text>)
(def: (hash input)
(_lux_proc ["text" "hash"] [input])))
(def: #export concat
(-> (List Text) Text)
(let [(^open) list;Fold<List>
(^open) Monoid<Text>]
(|>. list;reverse (fold append unit))))
(def: #export (join-with sep texts)
(-> Text (List Text) Text)
(|> texts (list;interpose sep) concat))
(def: #export (empty? text)
(-> Text Bool)
(case text
"" true
_ false))
(def: #export (replace-once pattern value template)
(-> Text Text Text Text)
(default template
(do Monad<Maybe>
[[pre post] (split-with pattern template)]
(let [(^open) Monoid<Text>]
(wrap ($_ append pre value post))))))
(def: #export (enclose [left right] content)
{#;doc "Surrounds the given content text with left and right side additions."}
(-> [Text Text] Text Text)
(let [(^open) Monoid<Text>]
($_ append left content right)))
(def: #export (enclose' boundary content)
{#;doc "Surrounds the given content text with the same boundary text."}
(-> Text Text Text)
(enclose [boundary boundary] content))
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