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(define-module (web view markdown)
#:use-module (json)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:use-module (ice-9 iconv)
#:use-module (ice-9 receive)
#:use-module (ice-9 string-fun)
#:use-module (ice-9 textual-ports)
#:use-module (ice-9 exceptions)
#:use-module (ice-9 popen)
#:use-module (ice-9 rdelim)
#:use-module (sxml simple)
#:use-module (web client)
#:use-module (web uri)
#:use-module (web request)
#:use-module (web sxml)
#:use-module (commonmark)
#:export (markdown-file->sxml
markdown-github->sxml
fetch-file
fetch-raw-file
commit-file
is-repo?)
)
(define (markdown-file->sxml fn)
"Parse a local file"
(commonmark->sxml
(call-with-input-file fn
get-string-all)))
;; --- fetch github style URLs
(define (fetch-raw-file url)
(receive (response-status response-body)
(http-request url)
response-body))
;; https://github.com/genenetwork/gn-docs/master/general/brand/aging/home.md
;; https://raw.githubusercontent.com/genenetwork/gn-docs/master/general/brand/aging/home.md
;; https://github.com/genenetwork/gn-docs/edit/master/general/brand/aging/home.md
(define (form-github-raw-url project repo page)
(string-append "https://raw.githubusercontent.com/" project "/" repo "/master/" (string-join page "/")))
(define (form-github-edit-url project repo page)
(string-append "https://github.com/" project "/" repo "/edit/master/" (string-join page "/")))
(define (markdown-github->sxml path)
"Parse a github markdown file that is formed like genenetwork/gn-docs/general/brand/aging/home.md"
(match-let (((project repo page ...) (string-split path #\/)))
`(div (@ (class "markdown"))
,(commonmark->sxml
(fetch-raw-file (pk (form-github-raw-url project repo (pk page)))))
(p
(div (@ (class "button-align-right"))
(a (@ (href ,(form-github-edit-url project repo page)) (role "button")) "edit")))
(br)
(br))))
(define (fetch-file repo query_path)
(let* ( (abs_path (string-append repo "/" query_path)))
(if (file-exists? abs_path) (let* ((full_path (canonicalize-path abs_path))
(content (call-with-input-file full_path get-string-all))
(commit-sha (get-latest-commit-sha1 repo))
)
`(("path" . ,query_path)
("content" . ,content)
("hash" . ,commit-sha))
) (throw 'file-error (string-append "the file path " abs_path " does not exists")))))
(define (git-invoke repo-path . args)
(apply system* "git" "-C" repo-path args))
(define (is-repo? repo-path)
(let ((data (git-invoke repo-path "rev-parse")) )
(zero? data))
)
(define (get-latest-commit-sha1 repo-path)
(let* ((output-port (open-input-pipe (string-append "git -C " repo-path " log -n 1 --pretty=format:%H HEAD")))
(commit-sha (read-line output-port)))
(close-port output-port)
commit-sha))
(define* (commit-file repo file-path content commit-message username email #:optional (prev-commit ""))
(if (string=? prev-commit (get-latest-commit-sha1 repo))
#t
(throw 'system-error (format #f "Commits do no match.Please pull in latest changes for current * ~a * and prev * ~a * "
(get-latest-commit-sha1 repo) prev-commit))
)
(if (is-repo? repo)
(match (file-exists? (string-append repo "/" file-path))
(#t
(with-output-to-file (string-append repo "/" file-path)
(lambda ()
(display content)))
(let* ((git-add-file (git-invoke repo "add" file-path))
(git-commit-file
(git-invoke repo "commit"
"-m" commit-message
"-m" " * Commit made via the GN Markdown Editor"
"--author" (format #f "~a <~a>" username email))
)
(git-commit-sha (get-latest-commit-sha1 repo))
)
(if (zero? git-commit-file)
`(("status" . "201") ("message" . "committed file successfully") ("content" . ,content) ("commit-sha" . ,git-commit-sha) ("commit-message" . ,commit-message) )
`(("status" . "200") ("message" . "Nothing to commit, working tree clean") ("commit-sha" . ,git-commit-sha))
)))
(#f
(throw 'system-error (string-append file-path " File does not exist Error"))))
(throw 'system-error (string-append repo " Is not a git repo."))))
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