Merge pull request #9 from alpha6/pagination

Pagination

fotostore.pl

@@ -9,6 +9,7 @@ use File::Basename 'basename';
 use File::Path 'mkpath';
 use File::Spec 'catfile';
 use Cwd;
+use POSIX;
 
 use Imager;
 use DBI;
@@ -141,10 +142,21 @@ get '/' => sub {
 get '/get_images' => ( authenticated => 1 ) => sub {
     my $self = shift;
 
+    #Getting current user
     my $current_user = $self->current_user;
     my $user_id      = $current_user->{'user_id'};
 
-    my $files_list = $db->get_files( $current_user->{'user_id'}, 20 );
+    #Getting images list with paging
+    my $page = $self->param('page') || 1;
+    my $items = $self->param('per-page') || 20;
+
+    if (($page !~ /^\d+$/) || ($page <= 1)) { $page = 1}
+    if (($items !~ /^\d+$/) || ($items <= 0)) { $items = 20}
+    
+    # process images list
+    my $req_result = $db->get_files( $current_user->{'user_id'}, $items , $page);
+    my $files_list = $req_result->{'images_list'};
+    my $pages_count = ceil($req_result->{'total_rows'}/$items);
 
     my $thumbs_dir =
       File::Spec->catfile( $IMAGE_DIR, $current_user->{'user_id'},
@@ -157,6 +169,7 @@ get '/get_images' => ( authenticated => 1 ) => sub {
     for my $img_item (@$files_list) {
         my $file     = $img_item->{'file_name'};
         my $img_hash = {};
+        $img_hash->{'id'} = $img_item->{'file_id'};
         $img_hash->{'filename'} = $img_item->{'original_filename'};
         $img_hash->{'original_url'} =
           File::Spec->catfile( '/', $IMAGE_BASE, $current_user->{'user_id'},
@@ -185,10 +198,14 @@ get '/get_images' => ( authenticated => 1 ) => sub {
         $img_hash->{'scales'} = \@scaled;
 
         push( @$images, $img_hash );
+
+        
     }
 
+    my $reply_data = { current_page => $page, items_per_page => $items, pages_count => $pages_count, images_list => $images };
+
     # Render
-    return $self->render( json => $images );
+    return $self->render( json => $reply_data );
 };
 
 # Upload image file
@@ -201,7 +218,7 @@ post '/upload' => ( authenticated => 1 ) => sub {
 
     my $user    = $self->current_user();
     my $user_id = $user->{'user_id'};
-    $self->app->log->debug( "user:" . Dumper($user) );
+    # $self->app->log->debug( "user:" . Dumper($user) );
 
     # Not upload
     unless ($image) {

lib/FotoStore/DB.pm

@@ -1,5 +1,6 @@
 package FotoStore::DB;
 
+use v5.20;
 use strict;
 use warnings;
 
@@ -59,8 +60,17 @@ sub add_file($self, $user_id, $filename, $original_filename) {
     return $rows;
 }
 
-sub get_files($self, $user_id, $count=20, $start_at=0) {
-    return $self->{'dbh'}->selectall_arrayref(q~select * from images where owner_id=? order by created_time desc~, { Slice => {} }, $user_id );
+sub get_files($self, $user_id, $items_count=20, $page=1) {
+
+    # Calculate offset 
+    # Pages in UI starts from 1, but here we need it to start from 0
+    $page = 1 if ($page < 1);
+    my $start_at = --$page * $items_count;
+
+    my ($rows_count) = $self->{'dbh'}->selectrow_array(q~select count(*) from images where owner_id=? ~, undef , $user_id);
+    my $images_list = $self->{'dbh'}->selectall_arrayref(q~select * from images where owner_id=? order by created_time desc LIMIT ? OFFSET ? ~, { Slice => {} }, $user_id, $items_count, $start_at  );
+
+    return { total_rows => $rows_count, images_list => $images_list };
 }
 
 1;

templates/includes/images_list.html.ep

@@ -68,7 +68,20 @@
                 </div>
             </div>
         </div>
+        <div class="container paginator">
+            <div class="btn-group">
+                <button type="button" class="btn btn-default">Prev</button>
+                <button type="button" class="btn btn-default" v-for="pageNumber in pagesCount" v-on:click="fetchData(pageNumber)">{{ pageNumber }}</button>
+                <button type="button" class="btn btn-default">Next</button>
+            </div>
+            <div class="container">
+                <div class="items-per-page-form">Fotos per page: <input v-model="imagesPerPage">
+                    <button type="button" class="btn btn-default" v-on:click="fetchData()">Update</button>
+                </div>
+            </div>
+        </div>
     </div>
+    
 </div>
 
 <script>
@@ -78,27 +91,31 @@
     var demo = new Vue({
 
         el: '#images_list',
-
         data: {
-            imagesList: null
+            imagesList: null,
+            pageNumber: 1,
+            pagesCount: 5,
+            imagesPerPage: 20,
         },
 
         created: function () {
-            this.fetchData()
+           this.fetchData(1)
         },
 
         methods: {
-            fetchData: function () {
-            var xhr = new XMLHttpRequest()
-            var self = this
-            xhr.open('GET', apiURL)
-            xhr.onload = function () {
-                self.imagesList = JSON.parse(xhr.responseText)
-            }
-            xhr.send()
+            fetchData: function (pageNumber) {
+                var xhr = new XMLHttpRequest()
+                var self = this
+                xhr.open('GET', apiURL+"?page="+pageNumber+"&per-page="+self.imagesPerPage)
+                xhr.onload = function () {
+                    var result = JSON.parse(xhr.responseText);
+                    self.imagesList = result.images_list;
+                    self.pagesCount = result.pages_count;
+                }
+                xhr.send()
             },
             copyText(event) {
-                //TODO: rewrite it to vue/JS from jquery
+                //TODO: rewrite it to vue or pure JS from jQuery
                 var $temp = $("<input>");
                 $("body").append($temp);
                 $temp.val($(event.target).text().trim()).select();
@@ -107,5 +124,5 @@
             },
         }
         
-    })
+    });
 </script>