@dcl-sdk/utils
Version:
A collection of helpers to make it easier to build a Decentraland scene using the SDK 7.
331 lines • 37.3 kB
JavaScript
import { priority } from './priority';
export var actions;
(function (actions) {
class SequenceRunner {
constructor(targetEngine, sequenceBuilt, onFinishCallback) {
this.beginSequenceNode = null;
this.currentSequenceNode = null;
this.running = false;
this.started = false;
this.engine = targetEngine;
this.systemFn = (dt) => { this.update(dt); };
this.engine.addSystem(this.systemFn, priority.ActionSystemPriority);
if (sequenceBuilt) {
this.startSequence(sequenceBuilt);
}
if (onFinishCallback)
this.setOnFinishCallback(onFinishCallback);
}
startSequence(sequenceBuilt) {
this.beginSequenceNode = sequenceBuilt.beginSequenceNode;
this.currentSequenceNode = this.beginSequenceNode;
this.running = true;
this.started = false;
}
destroy() {
this.engine.removeSystem(this.systemFn);
}
setOnFinishCallback(onFinishCallback) {
this.onFinishCallback = onFinishCallback;
}
isRunning() {
return this.running;
}
stop() {
this.running = false;
}
resume() {
if (this.beginSequenceNode != null)
this.running = true;
}
reset() {
this.currentSequenceNode = this.beginSequenceNode;
this.running = true;
this.started = false;
}
getRunningAction() {
let currentNode = this.currentSequenceNode;
if (this.currentSequenceNode instanceof SubSequenceNode) {
do {
currentNode = currentNode.currentInnerSequence;
} while (currentNode instanceof SubSequenceNode);
}
return currentNode.action;
}
update(dt) {
if (!this.running)
return;
if (!this.started) {
this.currentSequenceNode.onStart();
this.started = true;
return;
}
if (!this.currentSequenceNode.hasFinish()) {
this.currentSequenceNode.update(dt);
return;
}
this.currentSequenceNode.onFinish();
this.currentSequenceNode = this.currentSequenceNode.next;
if (this.currentSequenceNode) {
this.currentSequenceNode.onStart();
}
else {
this.running = false;
if (this.onFinishCallback)
this.onFinishCallback();
}
}
}
actions.SequenceRunner = SequenceRunner;
class SequenceBuilder {
constructor() {
this.currentSequenceNode = null;
this.beginSequenceNode = null;
this.whileNodeStack = [];
}
then(action) {
if (this.currentSequenceNode == null) {
this.currentSequenceNode = new SequenceNode();
this.currentSequenceNode.action = action;
this.beginSequenceNode = this.currentSequenceNode;
}
else {
let next = new SequenceNode();
next.action = action;
this.currentSequenceNode = this.currentSequenceNode.then(next);
}
return this;
}
if(condition) {
let ifSeq = new IfSequenceNode(condition);
if (this.currentSequenceNode == null) {
this.currentSequenceNode = ifSeq;
this.beginSequenceNode = ifSeq;
}
else {
this.currentSequenceNode = this.currentSequenceNode.then(ifSeq);
}
return this;
}
else() {
let seq = this.currentSequenceNode.getSequence();
if (seq instanceof IfSequenceNode) {
seq.closed = true;
let elseSeq = new ElseSequenceNode(seq);
this.currentSequenceNode = this
.currentSequenceNode.then(elseSeq);
}
else {
throw new Error('IF statement is needed to be called before ELSE statement.');
}
return this;
}
endIf() {
let seq = this.currentSequenceNode.getSequence();
if (seq instanceof IfSequenceNode || seq instanceof ElseSequenceNode) {
seq.closed = true;
}
else {
throw new Error('IF statement is needed to be called before ENDIF statement.');
}
return this;
}
while(condition) {
let whileSeq = new WhileSequenceNode(condition);
if (this.currentSequenceNode == null) {
this.currentSequenceNode = whileSeq;
this.beginSequenceNode = whileSeq;
}
else {
this.currentSequenceNode = this.currentSequenceNode.then(whileSeq);
}
this.whileNodeStack.push(whileSeq);
return this;
}
endWhile() {
let seq = this.currentSequenceNode.getSequence();
if (seq instanceof WhileSequenceNode) {
seq.closed = true;
if (this.whileNodeStack.length > 0) {
this.whileNodeStack.splice(this.whileNodeStack.length - 1, 1);
}
}
else {
throw new Error('WHILE statement is needed to be called before ENDWHILE statement.');
}
return this;
}
breakWhile() {
if (this.whileNodeStack.length > 0) {
this.currentSequenceNode = this
.currentSequenceNode.then(new BreakWhileSequenceNode(this.whileNodeStack[this.whileNodeStack.length - 1]));
}
else {
throw new Error('WHILE statement is needed to be called before BREAKWHILE statement.');
}
return this;
}
}
actions.SequenceBuilder = SequenceBuilder;
class SequenceNode {
constructor() {
this.action = null;
this.next = null;
}
then(next) {
this.next = next;
return next;
}
onStart() {
if (this.action)
this.action.onStart();
}
update(dt) {
if (this.action)
this.action.update(dt);
}
onFinish() {
if (this.action)
this.action.onFinish();
}
hasFinish() {
if (this.action)
return this.action.hasFinished;
else
return true;
}
getSequence() {
return this;
}
}
actions.SequenceNode = SequenceNode;
class SubSequenceNode extends SequenceNode {
constructor() {
super(...arguments);
this.currentInnerSequence = null;
this.startingInnerSequence = null;
this.closed = false;
}
then(next) {
if (this.currentInnerSequence == null) {
this.currentInnerSequence = next;
this.startingInnerSequence = next;
}
else {
if (this.closed) {
this.next = next;
return next;
}
else {
this.currentInnerSequence = this.currentInnerSequence.then(next);
}
}
return this;
}
onStart() {
this.currentInnerSequence = this.startingInnerSequence;
if (this.currentInnerSequence)
this.currentInnerSequence.onStart();
}
update(dt) {
if (this.currentInnerSequence) {
if (!this.currentInnerSequence.hasFinish()) {
this.currentInnerSequence.update(dt);
}
else {
this.currentInnerSequence.onFinish();
this.currentInnerSequence = this.currentInnerSequence.next;
if (this.currentInnerSequence)
this.currentInnerSequence.onStart();
}
}
}
onFinish() {
if (this.currentInnerSequence)
this.currentInnerSequence.onFinish();
}
hasFinish() {
return this.currentInnerSequence == null;
}
getSequence() {
if (this.currentInnerSequence) {
let innerSeq = this.currentInnerSequence.getSequence();
if (innerSeq instanceof SubSequenceNode) {
if (!innerSeq.closed) {
return innerSeq;
}
}
}
return this;
}
}
class IfSequenceNode extends SubSequenceNode {
constructor(condition) {
super();
this.result = false;
this.condition = condition;
}
onStart() {
this.result = this.condition();
if (this.result)
super.onStart();
else
this.currentInnerSequence = null;
}
}
class ElseSequenceNode extends SubSequenceNode {
constructor(ifSequence) {
super();
this.ifSequence = null;
this.ifSequence = ifSequence;
}
onStart() {
if (this.ifSequence && !this.ifSequence.result)
super.onStart();
else
this.currentInnerSequence = null;
}
}
class WhileSequenceNode extends SubSequenceNode {
constructor(condition) {
super();
this.breakWhile = false;
this.condition = condition;
}
onStart() {
this.breakWhile = false;
if (this.condition())
super.onStart();
else
this.currentInnerSequence = null;
}
update(dt) {
if (this.currentInnerSequence) {
if (!this.currentInnerSequence.hasFinish()) {
this.currentInnerSequence.update(dt);
}
else {
this.currentInnerSequence.onFinish();
this.currentInnerSequence = this.currentInnerSequence.next;
if (this.currentInnerSequence == null)
this.currentInnerSequence = this.startingInnerSequence;
if (this.currentInnerSequence)
this.currentInnerSequence.onStart();
}
}
}
hasFinish() {
return this.breakWhile || !this.condition();
}
}
class BreakWhileSequenceNode extends SequenceNode {
constructor(whileNode) {
super();
this.whileNode = whileNode;
}
onStart() {
this.whileNode.breakWhile = true;
}
}
})(actions || (actions = {}));
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{ IEngine, SystemFn } from '@dcl/sdk/ecs'\nimport { priority } from './priority'\n\nexport namespace actions {\n\n  export class SequenceRunner {\n    private beginSequenceNode: SequenceNode | null = null\n    private currentSequenceNode: SequenceNode | null = null\n\n    private engine: IEngine\n    private systemFn: SystemFn\n\n    private running: boolean = false\n    private started: boolean = false\n\n    private onFinishCallback?: () => void\n\n    constructor(\n      targetEngine: IEngine,\n      sequenceBuilt?: SequenceBuilder,\n      onFinishCallback?: () => void\n    ) {\n      this.engine = targetEngine\n      this.systemFn = (dt) => { this.update(dt) }\n      this.engine.addSystem(this.systemFn, priority.ActionSystemPriority)\n      if (sequenceBuilt) {\n        this.startSequence(sequenceBuilt)\n      }\n      if (onFinishCallback)\n        this.setOnFinishCallback(onFinishCallback)\n    }\n  \n    startSequence(sequenceBuilt: SequenceBuilder) {\n      this.beginSequenceNode = sequenceBuilt.beginSequenceNode\n      this.currentSequenceNode = this.beginSequenceNode\n      this.running = true\n      this.started = false\n    }\n\n    destroy() {\n      this.engine.removeSystem(this.systemFn)\n    }\n\n    setOnFinishCallback(onFinishCallback: () => void) {\n      this.onFinishCallback = onFinishCallback\n    }\n\n    isRunning(): boolean {\n      return this.running\n    }\n\n    stop() {\n      this.running = false\n    }\n\n    resume() {\n      if (this.beginSequenceNode != null)\n        this.running = true\n    }\n\n    reset() {\n      this.currentSequenceNode = this.beginSequenceNode\n      this.running = true\n      this.started = false\n    }\n\n    getRunningAction(): IAction | null {\n      let currentNode: SequenceNode | null = this.currentSequenceNode\n\n      if (this.currentSequenceNode instanceof SubSequenceNode) {\n        do {\n          currentNode = (currentNode as SubSequenceNode).currentInnerSequence\n        } while (currentNode instanceof SubSequenceNode)\n      }\n      return (currentNode as SequenceNode).action\n    }\n\n    private update(dt: number): void {\n      if (!this.running)\n        return\n        \n      if (!this.started) {\n        (this.currentSequenceNode as SequenceNode).onStart()\n        this.started = true\n        return\n      }\n    \n      if (!(this.currentSequenceNode as SequenceNode).hasFinish()) {\n        (this.currentSequenceNode as SequenceNode).update(dt)\n        return\n      }\n\n      (this.currentSequenceNode as SequenceNode).onFinish()\n      this.currentSequenceNode = (this.currentSequenceNode as SequenceNode).next\n      if (this.currentSequenceNode) {\n        this.currentSequenceNode.onStart()\n      } else {\n        this.running = false\n        if (this.onFinishCallback) this.onFinishCallback()\n      }\n    }\n  }\n\n  export interface IAction {\n    onStart(): void\n    update(dt: number): void\n    onFinish(): void\n    hasFinished: boolean\n  }\n\n  export class SequenceBuilder {\n    private currentSequenceNode: SequenceNode | null = null\n    public beginSequenceNode: SequenceNode | null = null\n\n    private whileNodeStack: WhileSequenceNode[] = []\n\n    then(action: IAction): SequenceBuilder {\n      if (this.currentSequenceNode == null) {\n        this.currentSequenceNode = new SequenceNode()\n        this.currentSequenceNode.action = action\n        this.beginSequenceNode = this.currentSequenceNode\n      } else {\n        let next = new SequenceNode()\n        next.action = action\n        this.currentSequenceNode = this.currentSequenceNode.then(next)\n      }\n      return this\n    }\n\n    if(condition: () => boolean): SequenceBuilder {\n      let ifSeq = new IfSequenceNode(condition)\n      if (this.currentSequenceNode == null) {\n        this.currentSequenceNode = ifSeq\n        this.beginSequenceNode = ifSeq\n      } else {\n        this.currentSequenceNode = this.currentSequenceNode.then(ifSeq)\n      }\n      return this\n    }\n\n    else(): SequenceBuilder {\n      let seq = (this.currentSequenceNode as SequenceNode).getSequence()\n      if (seq instanceof IfSequenceNode) {\n        seq.closed = true\n        let elseSeq = new ElseSequenceNode(seq)\n        this.currentSequenceNode = (this\n          .currentSequenceNode as SequenceNode).then(elseSeq)\n      } else {\n        throw new Error(\n          'IF statement is needed to be called before ELSE statement.'\n        )\n      }\n      return this\n    }\n\n    endIf(): SequenceBuilder {\n      let seq = (this.currentSequenceNode as SequenceNode).getSequence()\n      if (seq instanceof IfSequenceNode || seq instanceof ElseSequenceNode) {\n        seq.closed = true\n      } else {\n        throw new Error(\n          'IF statement is needed to be called before ENDIF statement.'\n        )\n      }\n      return this\n    }\n\n    while(condition: () => boolean): SequenceBuilder {\n      let whileSeq = new WhileSequenceNode(condition)\n      if (this.currentSequenceNode == null) {\n        this.currentSequenceNode = whileSeq\n        this.beginSequenceNode = whileSeq\n      } else {\n        this.currentSequenceNode = this.currentSequenceNode.then(whileSeq)\n      }\n      this.whileNodeStack.push(whileSeq)\n      return this\n    }\n\n    endWhile(): SequenceBuilder {\n      let seq = (this.currentSequenceNode as SequenceNode).getSequence()\n      if (seq instanceof WhileSequenceNode) {\n        seq.closed = true\n        if (this.whileNodeStack.length > 0) {\n          this.whileNodeStack.splice(this.whileNodeStack.length - 1, 1)\n        }\n      } else {\n        throw new Error(\n          'WHILE statement is needed to be called before ENDWHILE statement.'\n        )\n      }\n      return this\n    }\n\n    breakWhile(): SequenceBuilder {\n      if (this.whileNodeStack.length > 0) {\n        this.currentSequenceNode = (this\n          .currentSequenceNode as SequenceNode).then(\n          new BreakWhileSequenceNode(\n            this.whileNodeStack[this.whileNodeStack.length - 1]\n          )\n        )\n      } else {\n        throw new Error(\n          'WHILE statement is needed to be called before BREAKWHILE statement.'\n        )\n      }\n      return this\n    }\n  }\n\n  export class SequenceNode {\n    action: IAction | null = null\n    next: SequenceNode | null = null\n  \n    then(next: SequenceNode): SequenceNode {\n      this.next = next\n      return next\n    }\n  \n    onStart() {\n      if (this.action) this.action.onStart()\n    }\n  \n    update(dt: number) {\n      if (this.action) this.action.update(dt)\n    }\n  \n    onFinish() {\n      if (this.action) this.action.onFinish()\n    }\n  \n    hasFinish(): boolean {\n      if (this.action) return this.action.hasFinished\n      else return true\n    }\n  \n    getSequence(): SequenceNode {\n      return this\n    }\n  }\n  \n  class SubSequenceNode extends SequenceNode {\n    currentInnerSequence: SequenceNode | null = null\n    startingInnerSequence: SequenceNode | null = null\n    closed: boolean = false\n  \n    then(next: SequenceNode): SequenceNode {\n      if (this.currentInnerSequence == null) {\n        this.currentInnerSequence = next\n        this.startingInnerSequence = next\n      } else {\n        if (this.closed) {\n          this.next = next\n          return next\n        } else {\n          this.currentInnerSequence = this.currentInnerSequence.then(next)\n        }\n      }\n      return this\n    }\n  \n    onStart() {\n      this.currentInnerSequence = this.startingInnerSequence\n      if (this.currentInnerSequence) this.currentInnerSequence.onStart()\n    }\n  \n    update(dt: number) {\n      if (this.currentInnerSequence) {\n        if (!this.currentInnerSequence.hasFinish()) {\n          this.currentInnerSequence.update(dt)\n        } else {\n          this.currentInnerSequence.onFinish()\n          this.currentInnerSequence = this.currentInnerSequence.next\n          if (this.currentInnerSequence) this.currentInnerSequence.onStart()\n        }\n      }\n    }\n  \n    onFinish() {\n      if (this.currentInnerSequence) this.currentInnerSequence.onFinish()\n    }\n  \n    hasFinish(): boolean {\n      return this.currentInnerSequence == null\n    }\n  \n    getSequence(): SequenceNode {\n      if (this.currentInnerSequence) {\n        let innerSeq = this.currentInnerSequence.getSequence()\n        if (innerSeq instanceof SubSequenceNode) {\n          if (!innerSeq.closed) {\n            return innerSeq\n          }\n        }\n      }\n      return this\n    }\n  }\n  \n  class IfSequenceNode extends SubSequenceNode {\n    condition: () => boolean\n    result: boolean = false\n  \n    constructor(condition: () => boolean) {\n      super()\n      this.condition = condition\n    }\n  \n    onStart() {\n      this.result = this.condition()\n      if (this.result) super.onStart()\n      else this.currentInnerSequence = null\n    }\n  }\n  \n  class ElseSequenceNode extends SubSequenceNode {\n    ifSequence: IfSequenceNode | null = null\n  \n    constructor(ifSequence: IfSequenceNode) {\n      super()\n      this.ifSequence = ifSequence\n    }\n  \n    onStart() {\n      if (this.ifSequence && !this.ifSequence.result) super.onStart()\n      else this.currentInnerSequence = null\n    }\n  }\n  \n  class WhileSequenceNode extends SubSequenceNode {\n    condition: () => boolean\n    breakWhile: boolean = false\n  \n    constructor(condition: () => boolean) {\n      super()\n      this.condition = condition\n    }\n  \n    onStart() {\n      this.breakWhile = false\n      if (this.condition()) super.onStart()\n      else this.currentInnerSequence = null\n    }\n  \n    update(dt: number) {\n      if (this.currentInnerSequence) {\n        if (!this.currentInnerSequence.hasFinish()) {\n          this.currentInnerSequence.update(dt)\n        } else {\n          this.currentInnerSequence.onFinish()\n          this.currentInnerSequence = this.currentInnerSequence.next\n          if (this.currentInnerSequence == null)\n            this.currentInnerSequence = this.startingInnerSequence\n          if (this.currentInnerSequence) this.currentInnerSequence.onStart()\n        }\n      }\n    }\n  \n    hasFinish(): boolean {\n      return this.breakWhile || !this.condition()\n    }\n  }\n  \n  class BreakWhileSequenceNode extends SequenceNode {\n    whileNode: WhileSequenceNode\n  \n    constructor(whileNode: WhileSequenceNode) {\n      super()\n      this.whileNode = whileNode\n    }\n  \n    onStart() {\n      this.whileNode.breakWhile = true\n    }\n  }\n}\n"]}