#lang racket/base
; SPDX-License-Identifier: BlueOak-1.0.0
; This file is licensed under the Blue Oak Model License 1.0.0.
(require deta
db/base
threading
racket/match
racket/string
txexpr
pollen/template
pollen/decode
(except-in pollen/core select) ; avoid conflict with deta
)
(require "dust.rkt" "cache.rkt" "snippets-html.rkt")
(provide parse-and-cache-article!
cache-index-entries-only!)
(define current-title (make-parameter #f))
(define current-excerpt (make-parameter #f))
(define current-notes (make-parameter '()))
(define current-disposition (make-parameter ""))
(define current-disp-id (make-parameter ""))
(define (filter-special-tags tx)
(match (get-tag tx)
['title (current-title tx) ""]
['excerpt (current-excerpt tx) ""]
['excerpt* (current-excerpt tx) `(@ ,@(get-elements tx))] ; splice contents back in
['note
(define note-id (build-note-id tx))
(cond [(attrs-have-key? tx 'disposition)
(current-disp-id note-id)
(current-disposition (attr-ref tx 'disposition))])
(current-notes (cons (attr-set tx 'note-id note-id) (current-notes))) ""]
[_ tx]))
;; Save an article and its notes (if any) to the database, and return
;; (values plain-title [rendered HTML of the complete article])
(define (parse-and-cache-article! pagenode doc)
(define body-txpr (decode doc #:txexpr-proc filter-special-tags))
(current-notes (reverse (current-notes)))
(let* ([pubdate (select-from-metas 'published (current-metas))]
[doc-html (->html body-txpr #:splice? #t)]
[title-specified? (if (current-title) #t #f)]
[title-val (or (current-title) (check-for-poem-title doc))]
[title-tx (make-article-title pagenode
title-val
body-txpr
(current-disposition)
(current-disp-id))]
[title-html (->html title-tx #:splice? #t)]
[title-plain (tx-strs title-tx)]
[header (html$-article-open pagenode title-specified? title-tx pubdate)]
[series-node (current-series-pagenode)]
[footertext (make-article-footertext pagenode
series-node
(current-disposition)
(current-disp-id)
(length (current-notes)))]
[footer (html$-article-close footertext)]
[listing-short (html$-article-listing-short pagenode pubdate title-html)]
[listing-full (string-append header doc-html footer)]
[listing-excerpt (match (current-excerpt)
[#f listing-full]
[(var e) (string-append header (html$-article-excerpt pagenode e) footer)])]
[notes (extract-notes pagenode title-plain (current-notes))]
[notes-section-html (html$-notes-section (map cadr notes))])
(thread
(lambda ()
(call-with-transaction
(cache-conn)
(lambda ()
(cache-index-entries! pagenode doc) ; note original doc is used here
(query-exec (cache-conn)
(delete (~> (from cache:note #:as n)
(where (= n.page ,(symbol->string pagenode))))))
(apply insert! (cache-conn) (map car notes))
(delete-article! pagenode)
(insert-one! (cache-conn)
(make-cache:article
#:page pagenode
#:title-plain title-plain
#:title-html-flow title-html
#:title-specified? title-specified?
#:published pubdate
#:updated (maybe-meta 'updated)
#:author (maybe-meta 'author default-authorname)
#:conceal (maybe-meta 'conceal)
#:series-page series-node
#:noun-singular (maybe-meta 'noun (current-series-noun))
#:note-count (length (current-notes))
#:content-html doc-html
#:disposition (current-disposition)
#:disp-html-anchor (current-disp-id)
#:listing-full-html listing-full
#:listing-excerpt-html listing-excerpt
#:listing-short-html listing-short))))))
(values title-plain (string-append header doc-html notes-section-html footer))))
(define (check-for-poem-title doc-txpr)
(match (car (get-elements doc-txpr))
[(txexpr 'div
(list (list 'class "poem"))
(list* (txexpr 'p
(list (list 'class "verse-heading"))
heading-elems)
_))
`(title (span [[class "smallcaps"]] "‘" ,@heading-elems "’"))]
[_ '()]))
;; Return a title txexpr for the current article, constructing a default if no title text was specified.
(define (make-article-title pagenode supplied-title body-tx disposition disp-note-id)
(define title-elems
(cond [(null? supplied-title) (list (default-title (get-elements body-tx)))]
[else (get-elements supplied-title)]))
(define disposition-part
(cond [(non-empty-string? disposition)
(define-values (mark _) (disposition-values disposition))
`(a [[class "disposition-mark"]
[href ,(format "~a~a#~a" web-root pagenode disp-note-id)]]
,mark)]
[else ""]))
;; Returns a txexpr, the tag will be discarded by the template/snippets
`(title ,@title-elems ,disposition-part))
;; Convert a bunch of information about an article into some nice English and links.
(define (make-article-footertext pagenode series disposition disp-note-id note-count)
(define series-part
(match (current-series-title)
[(? non-empty-string? s-title)
(format "<span class=\"series-part\">This is ~a, part of <a href=\"/~a\">‘~a’</a>.</span>"
(current-series-noun)
series
s-title)]
[_ ""]))
(define disp-part
(cond [(non-empty-string? disposition)
(define-values (mark verb) (disposition-values disposition))
(format "Now considered <a href=\"/~a#~a\">~a</a>."
pagenode
disp-note-id
verb)]
[else ""]))
(define notes-part
(cond [(note-count . > . 1)
(format "There are <a href=\"/~a#furthernotes\">~a notes</a> appended."
pagenode
note-count)]
[(and (note-count . > . 0) (string=? disposition ""))
(format "There is <a href=\"/~a#furthernotes\">a note</a> appended."
pagenode)]
[else ""]))
(cond [(ormap non-empty-string? (list series-part disp-part notes-part))
(string-join (list series-part disp-part notes-part))]
[else ""]))
;; ~~~ Notes ~~~
(define (extract-notes pagenode parent-title note-txprs)
(for/list ([n (in-list note-txprs)])
(make-note n pagenode parent-title)))
;; Save an individual note to the DB and return the HTML of the complete note as
;; it should appear on an individual article page
(define (make-note note-tx pagenode parent-title-plain)
(define-values (_ attrs elems) (txexpr->values note-tx))
(define disposition-attr (maybe-attr 'disposition attrs))
(define note-date (maybe-attr 'date attrs))
;; Check required attributes
(unless (non-empty-string? note-date)
(raise-arguments-error 'note "required attr missing: date" "attrs" attrs))
(unless (or (string=? "" disposition-attr)
(>= (length (string-split disposition-attr)) 2))
(raise-arguments-error 'note
"must be in format \"[symbol] [past-tense-verb]\""
"disposition attr"
disposition-attr))
(define-values (disp-mark disp-verb) (disposition-values disposition-attr))
(let* ([note-id (build-note-id note-tx)]
[title-tx (make-note-title pagenode parent-title-plain)]
[title-html (->html title-tx #:splice? #t)]
[author (maybe-attr 'author attrs default-authorname)]
[author-url (maybe-attr 'author-url attrs)]
[note-srcline (maybe-attr 'srcline attrs)]
[content-html (html$-note-contents disp-mark disp-verb elems)]
[listing-full (html$-note-listing-full pagenode
note-id
title-html
note-date
note-srcline
content-html
author
author-url)])
(list
(make-cache:note
#:page pagenode
#:html-anchor note-id
#:title-html-flow title-html
#:title-plain (tx-strs title-tx)
#:published note-date
#:author author
#:author-url author-url
#:disposition disposition-attr
#:series-page (current-series-pagenode)
#:conceal (or (maybe-attr 'conceal attrs #f) (maybe-meta 'conceal))
#:content-html content-html
#:listing-full-html listing-full
#:listing-excerpt-html listing-full
#:listing-short-html "")
(html$-note-in-article note-id note-date content-html author author-url))))
(define (make-note-title pagenode parent-title-plain)
`(note-title "Re: " (a [[class "cross-reference"]
[href ,(format "~a~a" web-root pagenode)]]
,parent-title-plain)))
;; ~~~ Keyword Index Entries ~~~
;; (private) Convert an entry key into a list of at most two elements,
;; a main entry and a sub-entry.
;; "entry" → '("entry" "")
;; "entry!sub" → '("entry" "sub")
;; "entry!sub!why?!? '("entry" "sub")
(define (split-entry str)
(define splits (string-split str "!"))
(list (car splits)
(cadr (append splits (list "")))))
(define (index-entry-txpr? tx)
(and (txexpr? tx)
(string=? "index-link" (attr-ref tx 'class "")) ; see definition of html-index
(attr-ref tx 'data-index-entry #f)))
(define (txexpr->index-entry tx pagenode)
(match (split-entry (attr-ref tx 'data-index-entry))
[(list main sub)
(make-cache:index-entry
#:entry main
#:subentry sub
#:page pagenode
#:html-anchor (attr-ref tx 'id))]))
;; Get index entries out of metas
(define (current-metas-keyword-entries pagenode)
(for/list ([kw (in-list (string-split (maybe-meta 'keywords "") #px";\\s*"))])
(match (split-entry kw)
[(list main sub)
(make-cache:index-entry
#:entry main
#:subentry sub
#:page pagenode
#:html-anchor "")])))
;; Save any index entries in doc to the SQLite cache.
;; Sub-entries are specified by "!" in the index key
(define (cache-index-entries! pagenode doc)
(define-values (_ entry-txs) (splitf-txexpr doc index-entry-txpr?))
(define all-entries
(append (for/list ([etx (in-list entry-txs)]) (txexpr->index-entry etx pagenode))
(current-metas-keyword-entries pagenode)))
(delete-index-entries! pagenode)
(save-cache-things! all-entries))
(define (cache-index-entries-only! title pagenode doc)
(void
(thread
(lambda ()
(call-with-transaction
(cache-conn)
(lambda ()
(cache-index-entries! pagenode doc)
(delete-article! pagenode)
(insert-one! (cache-conn)
(make-cache:article
#:title-plain title
#:conceal "blog,feed"
#:page pagenode))))))))
