#850 Add d&d to resource array input

browser/CHANGELOG.md

@@ -8,6 +8,7 @@ This changelog covers all three packages, as they are (for now) updated as a who
 
 - [#841](https://github.com/atomicdata-dev/atomic-server/issues/841) Add better inputs for `Timestamp` and `Date` datatypes.
 - [#842](https://github.com/atomicdata-dev/atomic-server/issues/842) Add media picker for properties with classtype file.
+- [#850](https://github.com/atomicdata-dev/atomic-server/issues/850) Add drag & drop sorting to ResourceArray inputs.
 
 ## v0.37.0
 

browser/data-browser/src/components/forms/InputResourceArray.tsx

@@ -3,11 +3,21 @@ import { ArrayError, useArray, validateDatatype } from '@tomic/react';
 import { Button } from '../Button';
 import { InputProps } from './ResourceField';
 import { ErrMessage } from './InputStyles';
-import { ResourceSelector } from './ResourceSelector';
-import { FaPlus, FaTrash } from 'react-icons/fa';
+import { ResourceSelector, ResourceSelectorProps } from './ResourceSelector';
 import { Column, Row } from '../Row';
 import { styled } from 'styled-components';
 import { useIndexDependantCallback } from '../../hooks/useIndexDependantCallback';
+import {
+  DndContext,
+  DragEndEvent,
+  DragOverlay,
+  useDraggable,
+  useDroppable,
+} from '@dnd-kit/core';
+import { transition } from '../../helpers/transition';
+import { FaGripVertical, FaPlus, FaTrash } from 'react-icons/fa6';
+import { createPortal } from 'react-dom';
+import { transparentize } from 'polished';
 
 interface InputResourceArrayProps extends InputProps {
   isA?: string;
@@ -20,22 +30,18 @@ export default function InputResourceArray({
   ...props
 }: InputResourceArrayProps): JSX.Element {
   const [err, setErr] = useState<ArrayError | undefined>(undefined);
+  const [draggingSubject, setDraggingSubject] = useState<string>();
   const [array, setArray] = useArray(resource, property.subject, {
     validate: false,
     commit,
   });
 
-  /** Add focus to the last added item */
-  const [lastIsNew, setLastIsNew] = useState(false);
-
   function handleAddRow() {
     setArray([...array, undefined]);
-    setLastIsNew(true);
   }
 
   function handleClear() {
     setArray([]);
-    setLastIsNew(false);
   }
 
   const handleRemoveRowList = useIndexDependantCallback(
@@ -57,7 +63,6 @@ export default function InputResourceArray({
         try {
           validateDatatype(newArray, property.datatype);
           setArray(newArray);
-          setLastIsNew(false);
           setErr(undefined);
         } catch (e) {
           setErr(e);
@@ -68,6 +73,21 @@ export default function InputResourceArray({
     [property.datatype, setArray],
   );
 
+  const handleDragEnd = ({ active, over }: DragEndEvent) => {
+    setDraggingSubject(undefined);
+
+    if (!over) {
+      return;
+    }
+
+    const oldPos = array.indexOf(active.id as string);
+    const newPos = over.id as number;
+    const newArray = [...array];
+    const [removed] = newArray.splice(oldPos, 1);
+    newArray.splice(newPos > oldPos ? newPos - 1 : newPos, 0, removed);
+    setArray(newArray);
+  };
+
   const errMaybe = useCallback(
     (index: number) => {
       if (err && err.index === index) {
@@ -82,21 +102,55 @@ export default function InputResourceArray({
   return (
     <Column>
       {array.length > 0 && (
-        <div>
-          {array.map((subject, index) => (
-            <ResourceSelector
-              key={`${property.subject}${index}`}
-              value={subject}
-              setSubject={handleSetSubjectList[index]}
-              error={errMaybe(index)}
-              isA={property.classType}
-              handleRemove={handleRemoveRowList[index]}
-              parent={resource.getSubject()}
-              {...props}
-              autoFocus={lastIsNew && index === array.length - 1}
-            />
-          ))}
-        </div>
+        <DndContext
+          onDragStart={event => setDraggingSubject(event.active.id as string)}
+          onDragCancel={() => setDraggingSubject(undefined)}
+          onDragEnd={handleDragEnd}
+        >
+          <RelativeContainer>
+            <DropEdge visible={!!draggingSubject} index={0} />
+            {array.map((subject, index) => (
+              <>
+                <DraggableResourceSelector
+                  first={index === 0}
+                  last={index === array.length - 1}
+                  subject={subject}
+                  key={`${property.subject}${index}`}
+                  value={subject}
+                  setSubject={handleSetSubjectList[index]}
+                  error={errMaybe(index)}
+                  isA={property.classType}
+                  handleRemove={handleRemoveRowList[index]}
+                  parent={resource.getSubject()}
+                  hideClearButton
+                  {...props}
+                />
+                {!(subject === undefined && index === array.length - 1) && (
+                  <DropEdge visible={!!draggingSubject} index={index + 1} />
+                )}
+              </>
+            ))}
+            {createPortal(
+              <StyledDragOverlay>
+                {!!draggingSubject && (
+                  <DummySelector
+                    first
+                    last
+                    id={draggingSubject}
+                    value={draggingSubject}
+                    setSubject={() => undefined}
+                    isA={property.classType}
+                    handleRemove={() => undefined}
+                    hideClearButton
+                    parent={resource.getSubject()}
+                    {...props}
+                  />
+                )}
+              </StyledDragOverlay>,
+              document.body,
+            )}
+          </RelativeContainer>
+        </DndContext>
       )}
       {!props.disabled && (
         <Row justify='space-between'>
@@ -129,6 +183,127 @@ export default function InputResourceArray({
   );
 }
 
+interface DropEdgeProps {
+  index: number;
+  visible: boolean;
+}
+
+const DropEdge = ({ index, visible }: DropEdgeProps) => {
+  const { setNodeRef, isOver } = useDroppable({
+    id: index,
+  });
+
+  return <DropEdgeElement ref={setNodeRef} active={isOver} visible={visible} />;
+};
+
+type DraggableResourceSelectorProps = ResourceSelectorProps & {
+  subject: string;
+};
+
+const DraggableResourceSelector = ({
+  subject,
+  ...props
+}: DraggableResourceSelectorProps) => {
+  const { attributes, listeners, setNodeRef, active } = useDraggable({
+    id: subject,
+    disabled: props.disabled,
+  });
+
+  if (subject === undefined) {
+    return <ResourceSelector {...props} />;
+  }
+
+  return (
+    <DragWrapper ref={setNodeRef} active={active?.id === subject}>
+      <ResourceSelector
+        {...props}
+        prefix={
+          !props.disabled ? (
+            <DragHandle
+              {...listeners}
+              {...attributes}
+              disabled={props.disabled}
+              type='button'
+              title='Move item'
+            >
+              <FaGripVertical />
+            </DragHandle>
+          ) : null
+        }
+      />
+    </DragWrapper>
+  );
+};
+
+const DummySelector = (props: ResourceSelectorProps) => {
+  return (
+    <DragWrapper active={false}>
+      <ResourceSelector
+        {...props}
+        prefix={
+          <DragHandle type='button'>
+            <FaGripVertical />
+          </DragHandle>
+        }
+      />
+    </DragWrapper>
+  );
+};
+
+const StyledDragOverlay = styled(DragOverlay)`
+  --search-box-bg: ${p => transparentize(0.5, p.theme.colors.bg)};
+  backdrop-filter: blur(3px);
+`;
+
+const RelativeContainer = styled.div`
+  position: relative;
+`;
+
+const DragHandle = styled.button`
+  display: flex;
+  align-items: center;
+  cursor: grab;
+  appearance: none;
+  background: transparent;
+  border: none;
+  &:active {
+    cursor: grabbing;
+    svg {
+      color: ${p => p.theme.colors.textLight};
+    }
+  }
+
+  svg {
+    color: ${p => p.theme.colors.textLight2};
+  }
+`;
+
+const DragWrapper = styled(Row)<{ active: boolean }>`
+  position: relative;
+  opacity: ${p => (p.active ? 0.4 : 1)};
+  width: 100%;
+
+  &:hover {
+    ${DragHandle} svg {
+      color: ${p => p.theme.colors.textLight};
+    }
+  }
+`;
+
 const StyledButton = styled(Button)`
   align-self: flex-start;
 `;
+
+const DropEdgeElement = styled.div<{ visible: boolean; active: boolean }>`
+  display: ${p => (p.visible ? 'block' : 'none')};
+  position: absolute;
+  height: 3px;
+  border-radius: 1.5px;
+  transform: scaleX(${p => (p.active ? 1.1 : 1)});
+  background: ${p => p.theme.colors.main};
+  opacity: ${p => (p.active ? 1 : 0)};
+  z-index: 2;
+  width: 100%;
+
+  ${transition('opacity', 'transform')}
+`;

browser/data-browser/src/components/forms/ResourceSelector/ResourceSelector.tsx

@@ -2,15 +2,15 @@ import { useState, useMemo, memo } from 'react';
 import { Dialog, useDialog } from '../../Dialog';
 import { useDialogTreeContext } from '../../Dialog/dialogContext';
 import { useSettings } from '../../../helpers/AppSettings';
-import { styled } from 'styled-components';
+import { css, styled } from 'styled-components';
 import { NewFormDialog } from '../NewForm/NewFormDialog';
 import { SearchBox } from '../SearchBox';
-import { SearchBoxButton } from '../SearchBox/SearchBox';
 import { FaTrash } from 'react-icons/fa';
 import { ErrorChip } from '../ErrorChip';
 import { urls } from '@tomic/react';
+import { SearchBoxButton } from '../SearchBox/SearchBoxButton';
 
-interface ResourceSelectorProps {
+export interface ResourceSelectorProps {
   /**
    * This callback is called when the Subject Changes. You can pass an Error
    * Handler as the second argument to set an error message. Take the second
@@ -34,6 +34,15 @@ interface ResourceSelectorProps {
   /** Is used when a new item is created using the ResourceSelector */
   parent?: string;
   hideCreateOption?: boolean;
+  hideClearButton?: boolean;
+
+  /** If true, this is the first item in a list, default=true*/
+  first?: boolean;
+  /** If true, this is the last item in a list, default=true*/
+  last?: boolean;
+
+  /** Some react node that is displayed in front of the text inside the input wrapper*/
+  prefix?: React.ReactNode;
 }
 
 /**
@@ -49,7 +58,11 @@ export const ResourceSelector = memo(function ResourceSelector({
   isA,
   disabled,
   parent,
+  hideClearButton,
   hideCreateOption,
+  first = true,
+  last = true,
+  prefix,
 }: ResourceSelectorProps): JSX.Element {
   const [dialogProps, showDialog, closeDialog, isDialogOpen] = useDialog();
   const [initialNewTitle, setInitialNewTitle] = useState('');
@@ -69,13 +82,15 @@ export const ResourceSelector = memo(function ResourceSelector({
   }, [hideCreateOption, setSubject, showDialog, isA]);
 
   return (
-    <Wrapper>
+    <Wrapper first={first} last={last}>
       <StyledSearchBox
+        prefix={prefix}
         value={value}
         onChange={setSubject}
         isA={isA}
         required={required}
         disabled={disabled}
+        hideClearButton={hideClearButton}
         onCreateItem={handleCreateItem}
       >
         {handleRemove && !disabled && (
@@ -107,26 +122,28 @@ export const ResourceSelector = memo(function ResourceSelector({
 // We need Wrapper to be able to target this component.
 const StyledSearchBox = styled(SearchBox)``;
 
-const Wrapper = styled.div`
+const Wrapper = styled.div<{ first?: boolean; last?: boolean }>`
+  --top-radius: ${p => (p.first ? p.theme.radius : 0)};
+  --bottom-radius: ${p => (p.last ? p.theme.radius : 0)};
+
   flex: 1;
+  max-width: 100%;
   position: relative;
-  --radius: ${props => props.theme.radius};
   ${StyledSearchBox} {
     border-radius: 0;
   }
 
-  &:first-of-type ${StyledSearchBox} {
-    border-top-left-radius: var(--radius);
-    border-top-right-radius: var(--radius);
-  }
-
-  &:last-of-type ${StyledSearchBox} {
-    border-bottom-left-radius: var(--radius);
-    border-bottom-right-radius: var(--radius);
-  }
+  & ${StyledSearchBox} {
+    border-top-left-radius: var(--top-radius);
+    border-top-right-radius: var(--top-radius);
+    border-bottom-left-radius: var(--bottom-radius);
+    border-bottom-right-radius: var(--bottom-radius);
 
-  &:not(:last-of-type) ${StyledSearchBox} {
-    border-bottom: none;
+    ${p =>
+      !p.last &&
+      css`
+        border-bottom: none;
+      `}
   }
 `;