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89 lines
3.3 KiB
Racket
89 lines
3.3 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" "pagetree.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 (metas->here metas)
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(hash? . -> . pagenode?)
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(path->pagenode (select-from-metas 'here-path metas)))
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(define (pagenode->path pagenode)
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(build-path (world:current-project-root) (symbol->string pagenode)))
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(define+provide/contract (select key value-source)
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(coerce/symbol? (or/c hash? txexpr? pagenode? pathish?) . -> . (or/c #f txexpr-element?))
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(define metas-result (and (not (txexpr? value-source)) (select-from-metas key value-source)))
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(or metas-result
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(let ([doc-result (select-from-doc key value-source)])
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(and doc-result (car doc-result)))))
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(define+provide/contract (select* key value-source)
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(coerce/symbol? (or/c hash? txexpr?) . -> . (or/c #f (listof txexpr-element?)))
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(define metas-result (and (not (txexpr? value-source)) (select-from-metas key value-source)))
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(define doc-result (select-from-doc key value-source))
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(define result (append (or (and metas-result (list metas-result)) null) (or doc-result null)))
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(and (not (null? result)) result))
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(define+provide/contract (select-from-metas key metas-source)
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(coerce/symbol? (or/c hash? pagenode? pathish?) . -> . (or/c #f txexpr-element?))
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(define metas (cond
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[(hash? metas-source) metas-source]
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[else (get-metas metas-source)]))
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(and (hash-has-key? metas key) (hash-ref metas key)))
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(define+provide/contract (select-from-doc key doc-source)
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(coerce/symbol? (or/c txexpr? pagenode? pathish?) . -> . (or/c #f (listof txexpr-element?)))
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(define doc (cond
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[(txexpr? doc-source) doc-source]
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[else (get-doc doc-source)]))
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(define result (se-path*/list (list key) doc))
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(and (not (null? result)) result))
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(define (get-metas pagenode-or-path)
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; ((or/c pagenode? pathish?) . -> . hash?)
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(define source-path (->source-path (cond
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[(pagenode? pagenode-or-path) (pagenode->path pagenode-or-path)]
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[else pagenode-or-path])))
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(if source-path
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(cached-require source-path world:meta-pollen-export)
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(error (format "get-metas: no source found for '~a' in directory ~a" pagenode-or-path (current-directory)))))
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(define (get-doc pagenode-or-path)
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; ((or/c pagenode? pathish?) . -> . (or/c txexpr? string?))
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(define source-path (->source-path (cond
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[(pagenode? pagenode-or-path) (pagenode->path pagenode-or-path)]
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[else pagenode-or-path])))
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(if source-path
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(cached-require source-path world:main-pollen-export)
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(error (format "get-doc: no source found for '~a' in directory ~a" pagenode-or-path (current-directory)))))
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(define+provide/contract (->html x)
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(xexpr? . -> . string?)
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(xexpr->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 "within when/block, ~a" (exn-message exn))))])
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(map ->string (list body ...))))
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"")]))
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