drag and drop players and opponents from racks

front/components/Rack.tsx

@@ -0,0 +1,59 @@
+import {Dispatch, ReactElement, RefObject, SetStateAction, useRef} from "react";
+import Draggable from "react-draggable";
+
+export interface RackInput {
+    id: string,
+    objects: [ReactElement[], Dispatch<SetStateAction<ReactElement[]>>],
+    canDetach: (ref: RefObject<HTMLDivElement>) => boolean,
+    onElementDetached: (ref: RefObject<HTMLDivElement>, el: ReactElement) => void,
+}
+
+interface RackItemInput {
+    item: ReactElement,
+    onTryDetach: (ref: RefObject<HTMLDivElement>, el: ReactElement) => void
+}
+
+/**
+ * A container of draggable objects
+ * */
+export function Rack({id, objects, canDetach, onElementDetached}: RackInput) {
+
+    const [rackObjects, setRackObjects] = objects
+
+    return (
+        <div id={id} style={{
+            display: "flex"
+        }}>
+            {rackObjects.map(element => (
+                <RackItem key={element.key}
+                          item={element}
+                          onTryDetach={(ref, element) => {
+                              if (!canDetach(ref))
+                                  return
+
+                              setRackObjects(objects => {
+                                  const index = objects.findIndex(o => o.key === element.key)
+                                  return objects.toSpliced(index, 1);
+                              })
+
+                              onElementDetached(ref, element)
+                          }}/>
+            ))}
+        </div>
+    )
+}
+
+function RackItem({item, onTryDetach}: RackItemInput) {
+    const divRef = useRef<HTMLDivElement>(null);
+
+    return (
+        <Draggable
+            position={{x: 0, y: 0}}
+            nodeRef={divRef}
+            onStop={() => onTryDetach(divRef, item)}>
+            <div ref={divRef}>
+                {item}
+            </div>
+        </Draggable>
+    )
+}

front/components/editor/BasketCourt.tsx

@@ -1,54 +1,39 @@
 import CourtSvg from '../../assets/basketball_court.svg';
 import '../../style/basket_court.css';
-import React, {MouseEvent, ReactElement, useEffect, useRef, useState} from "react";
-import Player from "./Player";
-import Draggable from "react-draggable";
+import {MouseEvent, ReactElement, useEffect, useRef, useState} from "react";
+import CourtPlayer from "./CourtPlayer";
+import {Player} from "../../data/Player";
 
-const TEAM_MAX_PLAYER = 5;
-
-export function BasketCourt() {
-    const [players, setPlayers] = useState<ReactElement[]>([])
+export function BasketCourt({players}: { players: Player[] }) {
+    const [courtPlayers, setCourtPlayers] = useState<ReactElement[]>([])
     const divRef = useRef<HTMLDivElement>(null);
 
+    useEffect(() => {
+        const bounds = divRef.current!.getBoundingClientRect();
+        setCourtPlayers(players.map(player => {
+            return (
+                <CourtPlayer key={player.id}
+                             pos={player.position}
+                             x={(bounds.width * player.right_percentage)}
+                             y={(bounds.height * player.bottom_percentage)}
+                             bounds={{bottom: bounds.height, top: 0, left: 0, right: bounds.width}}
+                             onRemove={() => {
+                                 // setCourtPlayers(players => {
+                                 //     // recompute the player's index as it may have been moved if
+                                 //     // previous players were removed and added.
+                                 //     const playerCurrentIndex = players.findIndex(p => p.key === playerIndex.toString())
+                                 //     return players.toSpliced(playerCurrentIndex, 1)
+                                 // })
+                             }}
+                />
+            )
+        }))
+    }, [players, divRef]);
+
     return (
         <div id="court-container" ref={divRef}>
-            <CourtSvg
-                id="court-svg"
-                onClick={(e: MouseEvent) => {
-                    const bounds = divRef.current!.getBoundingClientRect();
-
-                    if (players.length >= TEAM_MAX_PLAYER) {
-                        return;
-                    }
-
-                    // find a valid number for the player to place.
-                    let playerIndex = players.findIndex((v, i) =>
-                        v.key !== i.toString()
-                    );
-
-                    if (playerIndex == -1) {
-                        playerIndex = players.length;
-                    }
-
-                    const player = (
-                        <Player key={playerIndex}
-                                id={playerIndex + 1}
-                                x={e.clientX - bounds.x}
-                                y={e.clientY - bounds.y}
-                                bounds={{bottom: bounds.height, top: 0, left: 0, right: bounds.width}}
-                                onRemove={() => {
-                                    setPlayers(players => {
-                                        // recompute the player's index as it may have been moved if
-                                        // previous players were removed and added.
-                                        const playerCurrentIndex = players.findIndex(p => p.key === playerIndex.toString())
-                                        return players.toSpliced(playerCurrentIndex, 1)
-                                    })
-                                }}
-                        />
-                    );
-                    setPlayers(players => players.toSpliced(playerIndex, 0, player))
-                }}/>
-            {players}
+            <CourtSvg id="court-svg"/>
+            {courtPlayers}
         </div>
     )
 }

front/components/editor/CourtPlayer.tsx

@@ -2,16 +2,20 @@ import React, {useRef} from "react";
 import "../../style/player.css";
 import RemoveIcon from "../../assets/icon/remove.svg";
 import Draggable, {DraggableBounds} from "react-draggable";
+import {PlayerPiece} from "./PlayerPiece";
 
 export interface PlayerOptions {
-    id: number,
+    pos: string,
     x: number,
     y: number,
     bounds: DraggableBounds,
     onRemove: () => void
 }
 
-export default function Player({id, x, y, bounds, onRemove}: PlayerOptions) {
+/**
+ * A player that is placed on the court, which can be selected, and moved in the associated bounds
+ * */
+export default function CourtPlayer({pos, x, y, bounds, onRemove}: PlayerOptions) {
 
     const ref = useRef<HTMLDivElement>(null);
     return (
@@ -38,10 +42,7 @@ export default function Player({id, x, y, bounds, onRemove}: PlayerOptions) {
                             className="player-selection-tab-remove"
                             onClick={() => onRemove()}/>
                     </div>
-                    <div
-                         className="player-piece">
-                        <p>{id}</p>
-                    </div>
+                    <PlayerPiece text={pos}/>
                 </div>
             </div>
 

front/components/editor/PlayerPiece.tsx

@@ -0,0 +1,11 @@
+import React from "react";
+import '../../style/player.css'
+
+
+export function PlayerPiece({text}: { text: string }) {
+    return (
+        <div className="player-piece">
+            <p>{text}</p>
+        </div>
+    )
+}

front/data/Player.ts

@@ -0,0 +1,22 @@
+export interface Player {
+    /**
+     * unique identifier of the player.
+     * This identifier must be unique to the associated court.
+     */
+    id: number,
+
+    /**
+     * player's position
+     * */
+    position: string,
+
+    /**
+     * Percentage of the player's position to the bottom (0 means top, 1 means bottom, 0.5 means middle)
+     */
+    bottom_percentage: number
+
+    /**
+     * Percentage of the player's position to the right (0 means left, 1 means right, 0.5 means middle)
+     */
+    right_percentage: number,
+}

front/style/editor.css

@@ -18,10 +18,23 @@
     align-items: stretch;
 }
 
+#racks {
+    display: flex;
+    justify-content: space-between;
+}
+
 .title_input {
     width: 25ch;
 }
 
+#edit-div {
+    height: 100%;
+}
+
+#team-rack .player-piece , #opponent-rack .player-piece {
+    margin-left: 5px;
+}
+
 #court-div {
     background-color: var(--background-color);
     height: 100%;

front/style/player.css

@@ -10,7 +10,7 @@ on the court.
 
 .player-content {
     /*apply a translation to center the player piece when placed*/
-    transform: translate(-50%, -75%);
+    transform: translate(-29%, -46%);
 
     display: flex;
     flex-direction: column;

front/views/Editor.tsx

@@ -1,17 +1,64 @@
-import React, {CSSProperties, useState} from "react";
+import {CSSProperties, ReactElement, RefObject, useRef, useState} from "react";
 import "../style/editor.css";
 import TitleInput from "../components/TitleInput";
 import {API} from "../Constants";
 import {BasketCourt} from "../components/editor/BasketCourt";
 
+import {Rack} from "../components/Rack";
+import {PlayerPiece} from "../components/editor/PlayerPiece";
+import {Player} from "../data/Player";
+
 const ERROR_STYLE: CSSProperties = {
     borderColor: "red"
 }
 
 export default function Editor({id, name}: { id: number, name: string }) {
-
     const [style, setStyle] = useState<CSSProperties>({});
 
+    const positions = ["PG", "SG", "SF", "PF", "C"]
+    const [team, setTeams] = useState(
+        positions.map(pos => <PlayerPiece key={pos} text={pos}/>)
+    )
+    const [opponents, setOpponents] = useState(
+        positions.map(pos => <PlayerPiece key={pos} text={pos}/>)
+    )
+
+    const [players, setPlayers] = useState<Player[]>([]);
+    const courtDivContentRef = useRef<HTMLDivElement>(null);
+
+    const canDetach = (ref: RefObject<HTMLDivElement>) => {
+        const refBounds = ref.current!.getBoundingClientRect();
+        const courtBounds = courtDivContentRef.current!.getBoundingClientRect();
+
+        // check if refBounds overlaps courtBounds
+        return !(
+            refBounds.top > courtBounds.bottom ||
+            refBounds.right < courtBounds.left ||
+            refBounds.bottom < courtBounds.top ||
+            refBounds.left > courtBounds.right
+        );
+    }
+
+    const onElementDetach = (ref: RefObject<HTMLDivElement>, element: ReactElement) => {
+        const refBounds = ref.current!.getBoundingClientRect();
+        const courtBounds = courtDivContentRef.current!.getBoundingClientRect();
+
+        const relativeXPixels = refBounds.x - courtBounds.x;
+        const relativeYPixels = refBounds.y - courtBounds.y;
+
+        const xPercent = relativeXPixels / courtBounds.width;
+        const yPercent = relativeYPixels / courtBounds.height;
+
+        setPlayers(players => {
+            return [...players, {
+                id: players.length,
+                position: element.props.text,
+                right_percentage: xPercent,
+                bottom_percentage: yPercent
+            }]
+        })
+    }
+
     return (
         <div id="main-div">
             <div id="topbar-div">
@@ -36,8 +83,22 @@ export default function Editor({id, name}: { id: number, name: string }) {
                 }}/>
                 <div>RIGHT</div>
             </div>
-            <div id="court-div">
-                <BasketCourt/>
+            <div id="edit-div">
+                <div id="racks">
+                    <Rack id="team-rack"
+                          objects={[team, setTeams]}
+                          canDetach={canDetach}
+                          onElementDetached={onElementDetach}/>
+                    <Rack id="opponent-rack"
+                          objects={[opponents, setOpponents]}
+                          canDetach={canDetach}
+                          onElementDetached={onElementDetach}/>
+                </div>
+                <div id="court-div">
+                    <div ref={courtDivContentRef}>
+                        <BasketCourt players={players}/>
+                    </div>
+                </div>
             </div>
         </div>
     )