implemented removing tags from documents

DELETE `/doc/{id}/tag/{lable}`

Author: nleanba

README.md

@@ -88,7 +88,7 @@ Parameterizable tags can only be added to a document with a value assigned. By `
 | `/doc/{id}/comment`        | GET    | Get comments                | - | - | - |
 | `/doc/{id}/tag`            | POST   | Add a tag to document       | Tag object / See above | - | Implemented |
 | `/doc/{id}/tag`            | GET    | Get tags of document        | - | Array of tag objects | Implemented |
-| `/doc/{id}/tag/{tagLabel}` | DELETE | Remove tag from document    | - | - | - |
+| `/doc/{id}/tag/{tagLabel}` | DELETE | Remove tag from document    | - | - | Implemented |
 | `/doc/{id}/title`          | PUT    | Set document title          | `{"title": "the_Title"}` | - | Implemented |
 | `/doc/{id}/title`          | GET    | Get document title          | - | `{"title": "the_Title"}` | Implemented |
 | `/doc/{id}/title`          | DELETE | Reset document title        | - | - | Implemented |

lib/metadeleter.js

@@ -16,7 +16,7 @@ function deleteTitle(id) {
     })
 }
 
-function deleteTag(label) {
+function deleteTag(label,id) {
     return fetch("http://fuseki:3030/3DOC/update", {
         method: "POST",
         headers: {
@@ -28,14 +28,19 @@ function deleteTag(label) {
             'PREFIX tridoc:  <http://vocab.tridoc.me/>\n' +
             'WITH <http://3doc/meta>\n' +
             'DELETE {\n' +
-            '  ?ptag ?p ?o .\n' +
-            '  ?s1 ?p1 ?ptag\n' +
+            (id ?
+                '  <http://3doc/data/' + id + '> tridoc:tag ?ptag \n'
+                : '  ?ptag ?p ?o .\n' +
+                '  ?s ?p1 ?ptag \n'
+            ) +
             '}\n' +
             'WHERE {\n' +
             '  ?ptag tridoc:parameterizableTag ?tag.\n' +
             '  ?tag tridoc:label "' + label + '" .\n' +
             '  OPTIONAL { ?ptag ?p ?o } \n' +
-            '  OPTIONAL { ?s1 ?p1 ?ptag } \n' +
+            '  OPTIONAL { \n' +
+               (id ? '  <http://3doc/data/' + id + '> tridoc:tag ?ptag \n' : '  ?s ?p1 ?ptag \n') +
+            '  } \n' +
             '}'
     }).catch(e => console.log(e)).then(() => {
         return fetch("http://fuseki:3030/3DOC/update", {
@@ -49,13 +54,18 @@ function deleteTag(label) {
                 'PREFIX tridoc:  <http://vocab.tridoc.me/>\n' +
                 'WITH <http://3doc/meta>\n' +
                 'DELETE {\n' +
-                '  ?tag ?p ?o .\n' +
-                '  ?s1 ?p1 ?tag\n' +
+                (id ?
+                    '  <http://3doc/data/' + id + '> tridoc:tag ?tag\n'
+                    : '  ?tag ?p ?o .\n' +
+                    '  ?s ?p1 ?tag\n'
+                ) +
                 '}\n' +
                 'WHERE {\n' +
                 '  ?tag tridoc:label "' + label + '" .\n' +
                 '  OPTIONAL { ?tag ?p ?o } \n' +
-                '  OPTIONAL { ?s1 ?p1 ?tag } \n' +
+                '  OPTIONAL { \n' +
+                (id ? '  <http://3doc/data/' + id + '> ?p1 ?tag\n' : '  ?s ?p1 ?tag\n') +
+                '  } \n' +
                 '}'
         })
     })

lib/server.js

@@ -170,6 +170,18 @@ server.route({
     }
 });
 
+server.route({
+    method: 'DELETE',
+    path: '/doc/{id}/tag/{label}',
+    config: {
+        handler: (request, h) => {
+            var label = decodeURIComponent(request.params.label);
+            var id = decodeURIComponent(request.params.id);
+            return metaDeleter.deleteTag(label,id);
+        }
+    }
+});
+
 server.route({
     method: 'PUT',
     path: '/doc/{id}/title',