Implement deleteFile graphql mutation (strapi#5292).

Signed-off-by: François de Metz <francois@2metz.fr>

packages/strapi-plugin-upload/config/schema.graphql.js

@@ -24,7 +24,6 @@ module.exports = {
     Mutation: {
       createFile: false,
       updateFile: false,
-      deleteFile: false,
       upload: {
         description: 'Upload one file',
         resolverOf: 'plugins::upload.upload.upload',
@@ -57,6 +56,15 @@ module.exports = {
           return await strapi.plugins.upload.services.upload.updateFileInfo(id, info);
         },
       },
+      deleteFile: {
+        description: 'Delete one file',
+        resolverOf: 'plugins::upload.upload.destroy',
+        resolver: async (obj, options, { context }) => {
+          const file = await strapi.plugins.upload.services.upload.fetch({ id: context.params.id });
+          const fileResult = await strapi.plugins.upload.services.upload.remove(file);
+          return { file: fileResult };
+        },
+      },
     },
   },
 };

packages/strapi-plugin-upload/test/graphqlUpload.test.e2e.js

@@ -147,4 +147,36 @@ describe('Upload plugin end to end tests', () => {
       },
     });
   });
+
+  test('Delete a file', async () => {
+    const res = await rq({
+      url: '/graphql',
+      method: 'POST',
+      body: {
+        query: /* GraphQL */ `
+          mutation removeFile($id: ID!) {
+            deleteFile(input: { where: { id: $id } }) {
+              file {
+                id
+              }
+            }
+          }
+        `,
+        variables: {
+          id: data.file.id,
+        },
+      },
+    });
+
+    expect(res.statusCode).toBe(200);
+    expect(res.body).toMatchObject({
+      data: {
+        deleteFile: {
+          file: {
+            id: data.file.id,
+          },
+        },
+      },
+    });
+  });
 });