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80 lines
2.6 KiB
Racket
80 lines
2.6 KiB
Racket
#lang racket/base
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(require (for-syntax racket/base))
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(require racket/string xml xml/path sugar/define sugar/container sugar/coerce/contract)
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(require "tools.rkt" txexpr "world.rkt" "cache.rkt")
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(require sugar/coerce/value)
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(provide (all-from-out sugar/coerce/value))
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(define/contract+provide (doc x)
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(coerce/path? . -> . txexpr?)
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(cached-require x world:main-pollen-export))
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(define/contract+provide (metas x)
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(coerce/path? . -> . hash?)
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(cached-require x world:meta-pollen-export))
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(define/contract+provide (find query . xs)
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((coerce/symbol?) #:rest (listof (or/c #f hash? txexpr? pathish?)) . ->* . (or/c #f txexpr-element?))
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(define result (apply find* query xs))
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(or (null? result) (car result)))
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(define/contract+provide (find* query . pxs)
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((coerce/symbol?) #:rest (listof (or/c #f hash? txexpr? pathish?)) . ->* . (or/c #f txexpr-element?))
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(define (finder x)
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(cond
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[(hash? x) (find-in-metas query x)]
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[(txexpr? x) (find-in-doc query x)]
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[(pathish? x) (find* query (doc x) (metas x))]
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[else null]))
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(append-map finder pxs))
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(define/contract+provide (find-in-metas query hash-or-path)
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(coerce/symbol? (or/c hash? pathish?) . -> . (or/c #f txexpr-elements?))
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(let ([metas (or (and (hash? hash-or-path) hash-or-path)
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(metas (->path hash-or-path)))])
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(with-handlers ([exn:fail? (λ(e) null)])
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(list (hash-ref metas query)))))
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(define/contract+provide (find-in-doc query doc-or-path)
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(coerce/symbol? (or/c txexpr? pathish?) . -> . (or/c #f txexpr-elements?))
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(let ([doc (or (and (txexpr? doc-or-path) doc-or-path)
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(doc (->path doc-or-path)))])
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(with-handlers ([exn:fail? (λ(e) null)])
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(se-path*/list query doc))))
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;; turns input into xexpr-elements so they can be spliced into template
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;; (as opposed to dropped in as a full txexpr)
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;; by returning a list, pollen rules will automatically merge into main flow
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;; todo: explain why
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;; todo: do I need this?
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(define+provide/contract (splice x)
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((or/c txexpr? txexpr-elements? string?) . -> . txexpr-elements?)
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(cond
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[(txexpr? x) (get-elements x)]
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[(txexpr-elements? x) x]
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[(string? x) (->list x)]))
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(define+provide/contract (->html x)
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(txexpr? . -> . string?)
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(txexpr->html x))
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(provide when/block)
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(define-syntax (when/block stx)
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(syntax-case stx ()
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[(_ condition body ...)
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#'(if condition (string-append*
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(with-handlers ([exn:fail? (λ(exn) (error (format "when/block: ~a" (exn-message exn))))])
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(map ->string (list body ...))))
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"")]))
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