Implement pagination

3 files changed, 27 insertions, 11 deletions

diff --git a/TODO b/TODO
index 141a0f2..ad2c40a 100644
--- a/TODO
+++ b/TODO
@@ -1,2 +1 @@
-* Pagination
 * Customizeable searx instance
diff --git a/server.rkt b/server.rkt
index 42da286..01177fe 100644
--- a/server.rkt
+++ b/server.rkt
@@ -30,23 +30,27 @@
 		   (include-template "templates/index.html")
 		   (do-footer))))
 
-(define (search query)
+(define (search query pageno)
   (define engine (string->url
 		   (string-append
-		     "https://search.trom.tf/search?format=json&q=" query)))
+		       "https://search.trom.tf/search?format=json&q="
+		       query
+		       "&pageno="
+		       pageno
+		       )))
   (define response (get-pure-port engine))
   (define json-raw (port->string response))
   (close-input-port response)
   (with-input-from-string json-raw (lambda () (read-json))))
 
-(define (http-response content)  ; The 'content' parameter should be a string.
+(define (http-response content)
   (response/full
-    200                  ; HTTP response code.
-    #"OK"                ; HTTP response message.
-    (current-seconds)    ; Timestamp.
-    TEXT/HTML-MIME-TYPE  ; MIME type for content.
-    '()                  ; Additional HTTP heads.
-    (list                ; Content (in bytes) to send to the browser.
+    200
+    #"OK"
+    (current-seconds)
+    TEXT/HTML-MIME-TYPE
+    '()
+    (list
       (string->bytes/utf-8 content))))
 
 (define (do-search req)
@@ -57,6 +61,9 @@
 
   (if (non-empty-string? query)
     (let ()
+      (define pageno (if (exists-binding? 'pageno binds)
+		       (extract-binding/single 'pageno binds)
+		       "1"))
       (define results
 	(foldr cons '()
 	       (filter hash?
@@ -76,7 +83,7 @@
 			    )
 			  ht
 		      ))
-		    (hash-ref (search query) 'results)))))
+		    (hash-ref (search query pageno) 'results)))))
       (http-response (string-append
 		       (do-head (string-append query " | Web Search"))
 		       (include-template "templates/search.html")
diff --git a/templates/search.html b/templates/search.html
index 58bf146..b3cf72d 100644
--- a/templates/search.html
+++ b/templates/search.html
@@ -16,3 +16,13 @@
 	</div>
 }
 </dl>
+
+<p style="text-align: left;">
+	<a href="search?q=query&pageno=@(- (string->number pageno) 1)"
+		style="@(when (equal? pageno "1") "visibility: hidden")">
+		Previous
+	</a>
+	<span style="float: right;">
+<a href="/search?q=query&pageno=@(+ (string->number pageno) 1)">Next</a>
+	</span>
+</p>