From 1c5d750d334c35b4efbaab51d31905216eeff17f Mon Sep 17 00:00:00 2001
From: Tiberiu Ichim <tiberiu.ichim@gmail.com>
Date: Sat, 18 Jul 2020 08:23:47 +0300
Subject: [PATCH] Added image upload dropzone

---
 src/TextBlock/TextBlockEdit.jsx           | 171 ++++++++++++++++++----
 src/TextBlock/keyboard/indentListItems.js |   4 +
 src/TextBlock/styles.css                  |  18 +++
 src/actions/content.js                    |  13 ++
 src/actions/index.js                      |   1 +
 src/actions/selection.js                  |   4 +-
 src/constants.js                          |   7 +-
 src/index.js                              |   3 +-
 src/reducers/content.js                   |  74 ++++++++++
 src/reducers/index.js                     |   1 +
 10 files changed, 257 insertions(+), 39 deletions(-)
 create mode 100644 src/TextBlock/styles.css
 create mode 100644 src/actions/content.js
 create mode 100644 src/reducers/content.js

diff --git a/src/TextBlock/TextBlockEdit.jsx b/src/TextBlock/TextBlockEdit.jsx
index a01fd91d..552602a6 100644
--- a/src/TextBlock/TextBlockEdit.jsx
+++ b/src/TextBlock/TextBlockEdit.jsx
@@ -3,12 +3,20 @@
  * especially the list element.
  */
 
-import React, { useMemo, useState } from 'react';
+import React from 'react';
 import { connect } from 'react-redux';
-import { Button } from 'semantic-ui-react';
+import { Button, Dimmer, Loader, Message } from 'semantic-ui-react';
+import { readAsDataURL } from 'promise-file-reader';
 
 import { Icon, BlockChooser, SidebarPortal } from '@plone/volto/components';
+import { uploadContent } from 'volto-slate/actions';
+import imageBlockSVG from '@plone/volto/components/manage/Blocks/Image/block-image.svg';
 import addSVG from '@plone/volto/icons/circle-plus.svg';
+import {
+  flattenToAppURL,
+  getBaseUrl,
+  isInternalURL,
+} from '@plone/volto/helpers';
 import { settings } from '~/config';
 
 import { saveSlateBlockSelection } from 'volto-slate/actions';
@@ -16,6 +24,8 @@ import SlateEditor from 'volto-slate/editor';
 import { serializeNodesToText } from 'volto-slate/editor/render';
 import ShortcutListing from './ShortcutListing';
 import { handleKey } from './keyboard';
+import Dropzone from 'react-dropzone';
+import './styles.css';
 
 // import { withList, withDeserializeHtml } from './extensions';
 // import {
@@ -34,16 +44,24 @@ const TextBlockEdit = (props) => {
     onChangeBlock,
     onMutateBlock,
     onSelectBlock,
+    pathname,
     properties,
     selected,
+    uploadRequest,
+    uploadContent,
+    uploadedContent,
   } = props;
 
-  // console.log('properties', properties);
-
   const { slate } = settings;
   const { textblockExtensions } = slate;
   const { value } = data;
-  const [addNewBlockOpened, setAddNewBlockOpened] = useState();
+
+  const [addNewBlockOpened, setAddNewBlockOpened] = React.useState();
+  const [showDropzone, setShowDropzone] = React.useState(false);
+  const [uploading, setUploading] = React.useState(false);
+  const [newImageId, setNewImageId] = React.useState(null);
+
+  const prevReq = React.useRef(null);
 
   // const keyDownHandlers = useMemo(() => {
   //   return {
@@ -106,36 +124,116 @@ const TextBlockEdit = (props) => {
     [props],
   );
 
+  const onDrop = React.useCallback(
+    (files) => {
+      setUploading(true);
+      const file = files[0];
+      readAsDataURL(file).then((data) => {
+        const fields = data.match(/^data:(.*);(.*),(.*)$/);
+        uploadContent(
+          getBaseUrl(pathname),
+          {
+            '@type': 'Image',
+            title: file.name,
+            image: {
+              data: fields[3],
+              encoding: fields[2],
+              'content-type': fields[1],
+              filename: file.name,
+            },
+          },
+          block,
+        );
+      });
+      setShowDropzone(false);
+    },
+    [pathname, uploadContent, block],
+  );
+
+  const { loaded, loading } = uploadRequest;
+  const imageId = uploadedContent['@id'];
+  const prevLoaded = prevReq.current;
+
+  React.useLayoutEffect(() => {
+    if (loaded && !loading && !prevLoaded && newImageId !== imageId) {
+      const url = flattenToAppURL(imageId);
+      setNewImageId(imageId);
+      setTimeout(() => {
+        const id = onAddBlock('image', index + 1);
+        const options = {
+          '@type': 'image',
+          url,
+        };
+        onChangeBlock(id, options);
+      }, 0);
+    }
+    prevReq.current = loaded;
+  }, [
+    loaded,
+    loading,
+    prevLoaded,
+    imageId,
+    newImageId,
+    index,
+    onChangeBlock,
+    onAddBlock,
+  ]);
+
   return (
     <>
       <SidebarPortal selected={selected}>
         <div id="slate-plugin-sidebar"></div>
         <ShortcutListing />
       </SidebarPortal>
-      <SlateEditor
-        index={index}
-        properties={properties}
-        onAddBlock={onAddBlock}
-        extensions={[withBlockProperties, ...textblockExtensions]}
-        onSelectBlock={onSelectBlock}
-        value={value}
-        block={block}
-        onChange={(value, selection) => {
-          // without using setTimeout, the user types characters on the right side of the text cursor
-          // timeoutTillRerender = setTimeout(() => {
-          //   saveSlateBlockSelection(block, selection);
-          // });
-
-          onChangeBlock(block, {
-            ...data,
-            value,
-            plaintext: serializeNodesToText(value || []),
-          });
-        }}
-        onKeyDown={handleKey}
-        selected={selected}
-        placeholder="Enter some rich text…"
-      />
+
+      <Dropzone
+        disableClick
+        onDrop={onDrop}
+        className="dropzone"
+        onDragOver={() => setShowDropzone(true)}
+        onDragLeave={() => setShowDropzone(false)}
+      >
+        {showDropzone ? (
+          <div className="drop-indicator">
+            {uploading ? (
+              <Dimmer active>
+                <Loader indeterminate>Uploading image</Loader>
+              </Dimmer>
+            ) : (
+              <Message>
+                <center>
+                  <img src={imageBlockSVG} alt="" />
+                </center>
+              </Message>
+            )}
+          </div>
+        ) : (
+          <SlateEditor
+            index={index}
+            properties={properties}
+            onAddBlock={onAddBlock}
+            extensions={[withBlockProperties, ...textblockExtensions]}
+            onSelectBlock={onSelectBlock}
+            value={value}
+            block={block}
+            onChange={(value, selection) => {
+              // without using setTimeout, the user types characters on the right side of the text cursor
+              // timeoutTillRerender = setTimeout(() => {
+              //   saveSlateBlockSelection(block, selection);
+              // });
+
+              onChangeBlock(block, {
+                ...data,
+                value,
+                plaintext: serializeNodesToText(value || []),
+              });
+            }}
+            onKeyDown={handleKey}
+            selected={selected}
+            placeholder="Enter some rich text…"
+          />
+        )}
+      </Dropzone>
       {!detached && !data.plaintext && (
         <Button
           basic
@@ -153,6 +251,15 @@ const TextBlockEdit = (props) => {
   );
 };
 
-export default connect(null, {
-  saveSlateBlockSelection, // needed to dispatch action in keyboard handlers
-})(TextBlockEdit);
+export default connect(
+  (state, props) => {
+    return {
+      uploadRequest: state.upload_content[props.block]?.upload || {},
+      uploadedContent: state.upload_content[props.block]?.data || {},
+    };
+  },
+  {
+    uploadContent,
+    saveSlateBlockSelection, // needed as editor blockProps
+  },
+)(TextBlockEdit);
diff --git a/src/TextBlock/keyboard/indentListItems.js b/src/TextBlock/keyboard/indentListItems.js
index 4b1f502b..55a59ed2 100644
--- a/src/TextBlock/keyboard/indentListItems.js
+++ b/src/TextBlock/keyboard/indentListItems.js
@@ -95,6 +95,7 @@ export function decreaseItemDepth(editor, event) {
 
   // Current list item being unindented
   const [listItemNode, listItemPath] = getCurrentListItem(editor);
+
   // The ul/ol that holds the current list item
   const [, parentListPath] = Editor.parent(editor, listItemPath);
 
@@ -108,6 +109,9 @@ export function decreaseItemDepth(editor, event) {
     return true;
   }
 
+  // TODO: when unindenting a sublist item, it should take its next siblings
+  // with it as a sublist
+
   // Get the parent list item for the parent
   const [, parentListItemPath] = Editor.parent(editor, parentListPath);
 
diff --git a/src/TextBlock/styles.css b/src/TextBlock/styles.css
new file mode 100644
index 00000000..feeaa3b1
--- /dev/null
+++ b/src/TextBlock/styles.css
@@ -0,0 +1,18 @@
+.drop-indicator {
+  width: 100%;
+  min-height: 6rem;
+}
+
+.drop-indicator .ui.message {
+  /* padding: 0px; */
+}
+
+.drop-indicator .ui.message center {
+  height: 100%;
+  /* margin: 0 auto; */
+}
+
+.drop-indicator .ui.message center img {
+  width: 100%;
+  height: 100%;
+}
diff --git a/src/actions/content.js b/src/actions/content.js
new file mode 100644
index 00000000..127b2697
--- /dev/null
+++ b/src/actions/content.js
@@ -0,0 +1,13 @@
+import { nestContent } from '@plone/volto/helpers';
+import { UPLOAD_CONTENT } from 'volto-slate/constants';
+
+// A custom version of Volto's createContent that can take an "origin" block id
+export function uploadContent(url, content, origin) {
+  return {
+    type: UPLOAD_CONTENT,
+    origin,
+    request: Array.isArray(content)
+      ? content.map((item) => ({ op: 'post', path: url, data: item }))
+      : { op: 'post', path: url, data: nestContent(content) },
+  };
+}
diff --git a/src/actions/index.js b/src/actions/index.js
index 6dd943c8..1579b446 100644
--- a/src/actions/index.js
+++ b/src/actions/index.js
@@ -1 +1,2 @@
 export saveSlateBlockSelection from './selection';
+export * from './content';
diff --git a/src/actions/selection.js b/src/actions/selection.js
index 05656b83..38d1458d 100644
--- a/src/actions/selection.js
+++ b/src/actions/selection.js
@@ -1,6 +1,8 @@
+import { SAVE_SLATE_BLOCK_SELECTION } from 'volto-slate/constants';
+
 export default function saveSlateBlockSelection(blockid, selection) {
   return {
-    type: 'SAVE_SLATE_BLOCK_SELECTION',
+    type: SAVE_SLATE_BLOCK_SELECTION,
     blockid,
     selection,
   };
diff --git a/src/constants.js b/src/constants.js
index f637a8d3..ac36f738 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -1,5 +1,2 @@
-export const LISTTYPES = ['bulleted-list', 'numbered-list'];
-
-export default {
-  LISTTYPES,
-};
+export const SAVE_SLATE_BLOCK_SELECTION = 'SAVE_SLATE_BLOCK_SELECTION';
+export const UPLOAD_CONTENT = 'UPLOAD_CONTENT';
diff --git a/src/index.js b/src/index.js
index 08a59779..6c7e4488 100644
--- a/src/index.js
+++ b/src/index.js
@@ -3,7 +3,7 @@
 
 import codeSVG from '@plone/volto/icons/code.svg';
 
-import { slate_block_selections } from './reducers';
+import { slate_block_selections, upload_content } from './reducers';
 
 import installVoltoProposals from './futurevolto/config';
 
@@ -90,6 +90,7 @@ const applyConfig = (config) => {
   config.addonReducers = {
     ...config.addonReducers,
     slate_block_selections,
+    upload_content,
   };
 
   config.views = {
diff --git a/src/reducers/content.js b/src/reducers/content.js
new file mode 100644
index 00000000..c5bcad75
--- /dev/null
+++ b/src/reducers/content.js
@@ -0,0 +1,74 @@
+/**
+ * Upload reducer.
+ * @module reducers/content
+ *
+ * Customized copy of Volto's content reducer
+ */
+
+import { settings } from '~/config';
+
+import { UPLOAD_CONTENT } from 'volto-slate/constants';
+
+const initialState = {};
+
+/**
+ * Content reducer.
+ * @function content
+ * @param {Object} state Current state.
+ * @param {Object} action Action to be handled.
+ * @returns {Object} New state.
+ */
+export default function upload_content(state = initialState, action = {}) {
+  let { result, origin } = action;
+  switch (action.type) {
+    case `${UPLOAD_CONTENT}_PENDING`:
+      return {
+        ...state,
+        [origin]: {
+          ...state[origin],
+          upload: {
+            loading: true,
+            loaded: false,
+            error: null,
+          },
+        },
+      };
+    case `${UPLOAD_CONTENT}_SUCCESS`:
+      return {
+        ...state,
+        [origin]: {
+          ...state[origin],
+          data: {
+            ...result,
+            items:
+              action.result &&
+              action.result.items &&
+              action.result.items.map((item) => ({
+                ...item,
+                url: item['@id'].replace(settings.apiPath, ''),
+              })),
+          },
+          upload: {
+            loading: false,
+            loaded: true,
+            error: null,
+          },
+        },
+      };
+    case `${UPLOAD_CONTENT}_FAIL`:
+      return {
+        ...state,
+        [origin]: {
+          ...state[origin],
+          data: null,
+          upload: {
+            loading: false,
+            loaded: false,
+            error: action.error,
+          },
+        },
+      };
+    default:
+      return state;
+  }
+}
diff --git a/src/reducers/index.js b/src/reducers/index.js
index cfc13e43..410f76d6 100644
--- a/src/reducers/index.js
+++ b/src/reducers/index.js
@@ -1 +1,2 @@
 export slate_block_selections from './selection';
+export upload_content from './content';