Add selector for number of items per page on search view

search.go

@@ -26,12 +26,13 @@ func buildQuery(q string) bson.M {
 }
 
 type searchData struct {
-	S     Status
-	Found int
-	Books []Book
-	Page  int
-	Next  string
-	Prev  string
+	S         Status
+	Found     int
+	Books     []Book
+	ItemsPage int
+	Page      int
+	Next      string
+	Prev      string
 }
 
 func searchHandler(w http.ResponseWriter, r *http.Request, sess *Session) {
@@ -48,19 +49,21 @@ func searchHandler(w http.ResponseWriter, r *http.Request, sess *Session) {
 			page = 0
 		}
 	}
-	res, num, _ := db.GetBooks(buildQuery(req), SEARCH_ITEMS_PAGE, page*SEARCH_ITEMS_PAGE)
+	items_page := itemsPage(r)
+	res, num, _ := db.GetBooks(buildQuery(req), items_page, page*items_page)
 
 	var data searchData
 	data.S = GetStatus(w, r)
 	data.S.Search = req
 	data.Books = res
+	data.ItemsPage = items_page
 	data.Found = num
 	data.Page = page + 1
-	if num > (page+1)*SEARCH_ITEMS_PAGE {
-		data.Next = "/search/?q=" + req + "&p=" + strconv.Itoa(page+1)
+	if num > (page+1)*items_page {
+		data.Next = "/search/?q=" + req + "&p=" + strconv.Itoa(page+1) + "&num=" + strconv.Itoa(items_page)
 	}
 	if page > 0 {
-		data.Prev = "/search/?q=" + req + "&p=" + strconv.Itoa(page-1)
+		data.Prev = "/search/?q=" + req + "&p=" + strconv.Itoa(page-1) + "&num=" + strconv.Itoa(items_page)
 	}
 
 	format := r.Form["fmt"]
@@ -70,3 +73,13 @@ func searchHandler(w http.ResponseWriter, r *http.Request, sess *Session) {
 		loadTemplate(w, "search", data)
 	}
 }
+
+func itemsPage(r *http.Request) int {
+	if len(r.Form["num"]) > 0 {
+		items_page, err := strconv.Atoi(r.Form["num"][0])
+		if err == nil {
+			return items_page
+		}
+	}
+	return SEARCH_ITEMS_PAGE
+}

templates/search.html

@@ -50,7 +50,17 @@
   <li class="previous">
     <a href="{{.Prev}}">&larr; Prev</a>
   </li>
+{{else}}
+  <div class="span1"></div>
 {{end}}
+<form class="form-inline span9 centered">
+<label>Books per page: </label>
+<div class="input-append" action="/search/">
+<input class="span1" name="num" type="text" value="{{.ItemsPage}}" />
+<button type="submit" class="btn">Ok</button>
+</div>
+<input class="hidden span1" name="q" type="text" value="{{.S.Search}}" />
+</form>
 {{if .Next}}
   <li class="next">
     <a href="{{.Next}}">Next &rarr;</a>