Add pagination on moderation page

admin.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"net/http"
 	"strings"
+	"strconv"
 )
 
 type settingsData struct {
@@ -159,6 +160,9 @@ type newData struct {
 	S     Status
 	Found int
 	Books []newBook
+	Page  int
+	Next  string
+	Prev  string
 }
 
 func newHandler(w http.ResponseWriter, r *http.Request) {
@@ -173,7 +177,16 @@ func newHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	res, num, _ := db.GetNewBooks()
+	page := 0
+	if len(r.Form["p"]) != 0 {
+		var err error
+		page, err = strconv.Atoi(r.Form["p"][0])
+		if err != nil {
+			page = 0
+		}
+	}
+	res, num, _ := db.GetNewBooks(NEW_ITEMS_PAGE, page*NEW_ITEMS_PAGE)
+
 	var data newData
 	data.S = GetStatus(w, r)
 	data.Found = num
@@ -183,6 +196,13 @@ func newHandler(w http.ResponseWriter, r *http.Request) {
 		_, data.Books[i].TitleFound, _ = db.GetBooks(buildQuery("title:"+b.Title), 1)
 		_, data.Books[i].AuthorFound, _ = db.GetBooks(buildQuery("author:"+strings.Join(b.Author, " author:")), 1)
 	}
+	data.Page = page+1
+	if num > (page+1)*NEW_ITEMS_PAGE {
+		data.Next = "/new/?p=" + strconv.Itoa(page+1)
+	}
+	if page > 0 {
+		data.Prev = "/new/?p=" + strconv.Itoa(page-1)
+	}
 	loadTemplate(w, "new", data)
 }
 

config.go

@@ -10,6 +10,7 @@ const (
 	PASS_SALT         = "ImperialLibSalt"
 	TAGS_DISPLAY      = 50
 	SEARCH_ITEMS_PAGE = 10
+	NEW_ITEMS_PAGE    = 50
 	TEMPLATE_PATH     = "templates/"
 	BOOKS_PATH        = "books/"
 	COVER_PATH        = "cover/"

database.go

@@ -151,21 +151,12 @@ func (d *DB) GetDownloadedBooks(num int) (books []Book, err error) {
 	return
 }
 
-/* Returns: list of books, number found and err
+/* optional parameters: length and start index
+ * 
+ * Returns: list of books, number found and err
  */
-func (d *DB) GetNewBooks() (books []Book, num int, err error) {
-	var q *mgo.Query
-	q = d.books.Find(bson.M{"$nor": []bson.M{{"active": true}}}).Sort("-_id")
-	num, err = q.Count()
-	if err != nil {
-		return
-	}
-
-	err = q.All(&books)
-	for i, b := range books {
-		books[i].Id = bson.ObjectId(b.Id).Hex()
-	}
-	return
+func (d *DB) GetNewBooks(r ...int) (books []Book, num int, err error) {
+	return d.GetBooks(bson.M{"$nor": []bson.M{{"active": true}}}, r...)
 }
 
 func (d *DB) BookActive(id bson.ObjectId) bool {

templates/new.html

@@ -7,6 +7,18 @@
 </div>
 {{end}}
 <p class="centered">Found {{.Found}} books.<br /></p>
+<ul class="pager">
+{{if .Prev}}
+  <li class="previous">
+    <a href="{{.Prev}}">&larr; Prev</a>
+  </li>
+{{end}}
+{{if .Next}}
+  <li class="next">
+    <a href="{{.Next}}">Next &rarr;</a>
+  </li>
+{{end}}
+</ul>
 
 {{range .Books}}
 	{{$titleFound  := .TitleFound}}
@@ -41,6 +53,18 @@
 	</div>
 	{{end}}
 {{end}}
+<ul class="pager">
+{{if .Prev}}
+  <li class="previous">
+    <a href="{{.Prev}}">&larr; Prev</a>
+  </li>
+{{end}}
+{{if .Next}}
+  <li class="next">
+    <a href="{{.Next}}">Next &rarr;</a>
+  </li>
+{{end}}
+</ul>
 {{if .Books}}
 <div class="centered btn-group">
 	<a href="/store/{{range .Books}}{{.B.Id}}/{{end}}" class="btn btn-large btn-success"><i class="icon-ok"></i> Save All</a>