Added the possibility to delete metadata files and their descriptors from the library and the web UI

Author: ggilestro

metadata_db.py

@@ -434,6 +434,26 @@ def request(self, identifier):
                 return self.all_info[identifier]
             except:
                 return {}
+
+    def remove (self, identifier):
+        '''
+        Phisically delete the metadata file and its descriptor
+        '''
+        info = self.request(identifier)
+
+        metadata_file = info['filename']
+        info_file = metadata_file + '.info'
+        
+        try:
+            os.remove(metadata_file)
+            os.remove(info_file)
+
+            self.refresh_all_info()
+            return True
+            
+        except:
+            return False
+
 
     def find(self, criteria):
         '''

metadata_db_server.py

@@ -89,13 +89,31 @@ def save():
         return {'success' : False, 'message' : str(e)}
 
 
+@app.route('/delete', method='GET')
+def delete_metadata_file():
+    hash_id = bottle.request.query.get('id', '')
+
+    if hash_id:
+        fullpath = meta_db.request(hash_id)['filename']
+
+        try:
+            meta_db.remove(hash_id)
+            return {'success' : True, 'message' : 'Metadata file successfully deleted.'}
+
+        except Exception as e:
+            return {'success' : False, 'message' : str(e)}
+    else:
+        return {'success' : False, 'message' : 'A valid identifier must be provided'}
+
+
 @app.route('/download', method='GET')
 def download():
     hash_id = bottle.request.query.get('id', '')
-    dwn_type = bottle.request.query.get('type', '')
     fullpath = meta_db.request(hash_id)['filename']
     path, filename = os.path.split( fullpath )
-    
+
+    dwn_type = bottle.request.query.get('type', '')
+
     if dwn_type == 'metadata':
         return bottle.static_file (filename, root=path,  download=filename)
 

static/index.html

@@ -150,7 +150,7 @@ <h4 class='header'>Browse</h4>
                     </div>
 
                     <div class="row col s12">
-                        <ul class="collection col s6" id="project-list">
+                        <ul class="collection col s6" id="project-list" style="border:0px;">
                         </ul>
                     </div>
 
@@ -227,7 +227,19 @@ <h4 class='header'>Search</h4>
                 <a href="#!" class="modal-close waves-effect waves-green btn-flat disabled" id="modal_btn">Done</a>
             </div>
         </div>      
-        
+
+        <!-- Refresh Modal Structure -->
+        <div id="delete_modal" class="modal">
+            <div class="modal-content">
+                <p id="modal_delete_text">Are you sure you want to delete this metadata file? This cannot be undone.</p>
+            </div>
+            <div class="modal-footer">
+                <a href="#!" class="modal-close waves-effect waves-green btn-flat" id="modal_delete_confirm_btn">Delete</a>
+                <a href="#!" class="modal-close waves-effect waves-green btn-flat" id="modal_delete_cancel_btn">Cancel</a>
+
+            </div>
+        </div>      
+
         <!-- partial -->
         <script src="/static/js/jquery.min.js"></script>
         <script src="/static/js/materialize.min.js"></script>

static/js/script.js

@@ -104,11 +104,34 @@ function refresh_info () {
         $('#project-list').html('');
         let prj_name = $("#project-select").val();
         $.each(data[prj_name], function (filename, identifier) {
-            $('#project-list').append($('<a href="#" class="collection-item" onclick="update_browser(\''+identifier+'\');return false;"></a>').text(filename));
+            $('#project-list').append($('<a href="#" class="collection-item" onclick="update_browser(\''+identifier+'\');return false;" style="display:inline-block">'+filename+'</a><a class="fa fa-trash" style="color:grey;float:right;margin-top:15px;" onclick="delete_metadata(\''+identifier+'\');"></a>'));
           })
     })
 }
 
+function delete_metadata(identifier) {
+
+    $('#delete_modal').show();
+    $('#delete_modal').focus();
+
+    $('#modal_delete_cancel_btn').click(function(){ 
+        $('#delete_modal').hide();
+    });
+
+    $('#modal_delete_confirm_btn').click(function(){ 
+        $.ajax({
+            url: '/delete',
+            timeout: 60 * 1000,
+            data : {'id' : identifier},
+            type: 'GET'
+        }).success( function( data ){
+            $('#modal_delete_text').html(data.message);
+            $('#modal_delete_confirm_btn').addClass("disabled");
+            $('#modal_delete_cancel_btn').text("OK");
+        });
+});
+}
+
 // INITIALIZATION OF AUTOCOMPLETE LIST
 function get_available_options () {
     $.get( '/known').success( function( data ){