Add delete flag in configuration. Fixes #593.

Adds a `delete` flag to collections in `config.yml`. Defaults to
false. This is mostly for use with files to restrict users from
deleting settings files etc that available via the CMS.

example/config.yml

@@ -10,6 +10,7 @@ collections: # A list of collections the CMS should be able to edit
     folder: "_posts"
     slug: "{{year}}-{{month}}-{{day}}-{{slug}}"
     create: true # Allow users to create new documents in this collection
+    delete: true # Allow users to delete documents from this collection
     fields: # The fields each document in this collection have
       - {label: "Title", name: "title", widget: "string", tagname: "h1"}
       - {label: "Publish Date", name: "date", widget: "datetime", format: "YYYY-MM-DD hh:mma"}
@@ -22,12 +23,14 @@ collections: # A list of collections the CMS should be able to edit
     label: "FAQ" # Used in the UI, ie.: "New Post"
     folder: "_faqs"
     create: true # Allow users to create new documents in this collection
+    delete: true # Allow users to delete documents from this collection
     fields: # The fields each document in this collection have
       - {label: "Question", name: "title", widget: "string", tagname: "h1"}
       - {label: "Answer", name: "body", widget: "markdown"}
 
   - name: "settings"
     label: "Settings"
+    delete: false
     editor:
       preview: false
     files:

src/backends/backend.js

@@ -3,7 +3,7 @@ import TestRepoBackend from "./test-repo/implementation";
 import GitHubBackend from "./github/implementation";
 import GitGatewayBackend from "./git-gateway/implementation";
 import { resolveFormat } from "../formats/formats";
-import { selectListMethod, selectEntrySlug, selectEntryPath, selectAllowNewEntries, selectFolderEntryExtension } from "../reducers/collections";
+import { selectListMethod, selectEntrySlug, selectEntryPath, selectAllowNewEntries, selectAllowDeletion, selectFolderEntryExtension } from "../reducers/collections";
 import { createEntry } from "../valueObjects/Entry";
 import { sanitizeSlug } from "../lib/urlHelper";
 
@@ -246,6 +246,11 @@ class Backend {
 
   deleteEntry(config, collection, slug) {
     const path = selectEntryPath(collection, slug);
+
+    if (!selectAllowDeletion(collection)) {
+      throw (new Error("Not allowed to delete entries in this collection"));
+    }
+
     const commitMessage = `Delete ${ collection.get('label') } “${ slug }”`;
     return this.implementation.deleteFile(path, commitMessage);
   }

src/containers/editorialWorkflow/EntryPageHOC.js

@@ -2,6 +2,7 @@ import React from 'react';
 import { connect } from 'react-redux';
 import { EDITORIAL_WORKFLOW } from '../../constants/publishModes';
 import { selectUnpublishedEntry, selectEntry } from '../../reducers';
+import { selectAllowDeletion } from "../../reducers/collections";
 import { loadUnpublishedEntry, persistUnpublishedEntry } from '../../actions/editorialWorkflow';
 
 
@@ -15,11 +16,14 @@ export default function EntryPageHOC(EntryPage) {
   function mapStateToProps(state, ownProps) {
     const { collections } = state;
     const isEditorialWorkflow = (state.config.get('publish_mode') === EDITORIAL_WORKFLOW);
-    const returnObj = { isEditorialWorkflow, showDelete: !ownProps.newEntry };
+    const collection = collections.get(ownProps.match.params.name);
+    const returnObj = {
+      isEditorialWorkflow,
+      showDelete: !ownProps.newEntry && selectAllowDeletion(collection),
+    };
     if (isEditorialWorkflow) {
       returnObj.showDelete = false;
       const slug = ownProps.match.params.slug;
-      const collection = collections.get(ownProps.match.params.name);
       const unpublishedEntry = selectUnpublishedEntry(state, collection.get('name'), slug);
       if (unpublishedEntry) {
         returnObj.unpublishedEntry = true;

src/reducers/collections.js

@@ -53,6 +53,9 @@ const selectors = {
     allowNewEntries(collection) {
       return collection.get('create');
     },
+    allowDeletion(collection) {
+      return collection.get('delete');
+    },
     templateName(collection) {
       return collection.get('name');
     },
@@ -80,6 +83,9 @@ const selectors = {
     allowNewEntries() {
       return false;
     },
+    allowDeletion(collection) {
+      return collection.get('delete');
+    },
     templateName(collection, slug) {
       return slug;
     },
@@ -92,6 +98,7 @@ export const selectEntryPath = (collection, slug) => selectors[collection.get('t
 export const selectEntrySlug = (collection, path) => selectors[collection.get('type')].entrySlug(collection, path);
 export const selectListMethod = collection => selectors[collection.get('type')].listMethod();
 export const selectAllowNewEntries = collection => selectors[collection.get('type')].allowNewEntries(collection);
+export const selectAllowDeletion = collection => selectors[collection.get('type')].allowDeletion(collection);
 export const selectTemplateName = (collection, slug) => selectors[collection.get('type')].templateName(collection, slug);
 export const selectInferedField = (collection, fieldName) => {
   const inferableField = INFERABLE_FIELDS[fieldName];