#lang scheme/base

(require setup/dirs net/sendurl net/uri-codec)
(provide perform-search send-main-page)

(define search-dir "search/")

;; Almost nothing to do here -- the real work is done in the browser,
;; using javascript.

(define (send-main-page #:sub [sub "index.html"]
                        #:fragment [fragment #f] #:query [query #f])
  (let* ([path (build-path (find-user-doc-dir) sub)]
         [path (if (file-exists? path) path (build-path (find-doc-dir) sub))])
    (send-url/file path #:fragment fragment #:query query)))

(define (perform-search str [context #f])
  ;; `context' can be a pre-filter query string to use for a context,
  ;; optionally a list of one and a label to display for that context.
  ;; In any case, when a context is specified, the search actually
  ;; goes through the search-context.html page which tranpolines to
  ;; the main search page after setting the cookies (so when the
  ;; search page is refreshed it won't reset the context).
  (let* ([label   (and (list? context) (= 2 (length context)) (cadr context))]
         [context (if (pair? context) (car context) context)]
         [page    (if context "search-context.htm" "index.html")]
         [query   (format "q=~a" (uri-encode str))]
         [query   (if context
                    (format "~a&hq=~a~a"
                            query (uri-encode context)
                            (if label
                              (format "&label=~a" (uri-encode label))
                              ""))
                    query)])
    (send-main-page #:sub (string-append search-dir page) #:query query)))