traffic-laser/src/graphic/Controls/AddLine.js

import { dataService } from "../Service/DataService";
import { lineService } from "../Service/LineService";
import { listenLayer } from "../ListenLayer";
import VectorCategory from "../enum/VectorCategory";
import Point from "../Geometry/Point.js";
import { mathUtil } from "../Util/MathUtil";
import Settings from "../Settings";
import { pointService } from "../Service/PointService";

export default class AddLine {
  constructor() {
    this.newLine = null;
    this.startInfo = {};
  }

  setPointInfo(pointInfo) {
    this.startInfo = {
      position: {
        x: pointInfo.x,
        y: pointInfo.y,
      },
      linkedPointId: pointInfo.linkedPointId,
      lineId: pointInfo.lineId,
    };
  }

  setNewLinePoint(position) {
    if (listenLayer.modifyPoint) {
      this.setPointInfo(listenLayer.modifyPoint);
    } else {
      this.setPointInfo(position);
    }
    return true;
  }

  buildLine(position) {
    if (
      this.newLine == null &&
      !mathUtil.equalPoint(this.startInfo.position, position)
    ) {
      this.newLine = lineService.create(this.startInfo.position, position);
    }
  }

  updateLine(position) {
    if (
      this.newLine != null &&
      !mathUtil.equalPoint(this.startInfo.position, position)
    ) {
      let point = dataService.getPoint(this.newLine.endId);
      point.setPosition(position);
    }
  }

  finish(position) {
    if (this.newLine != null) {
      if (mathUtil.equalPoint(this.startInfo.position, position)) {
        dataService.deleteLine(this.newLine.vectorId);
      } else if (
        listenLayer.modifyPoint &&
        listenLayer.modifyPoint.linkedPointId &&
        this.newLine.getCategory() != VectorCategory.Line.ArrowLine &&
        this.newLine.getCategory() != VectorCategory.Line.GuideLine
      ) {
        pointService.mergePoint(
          this.newLine.endId,
          listenLayer.modifyPoint.linkedPointId
        );
      }
      if (this.newLine.getCategory() == VectorCategory.Line.BaseLine) {
        Settings.baseLineId = this.newLine.vectorId;
      }
    }
  }
  clearVectorData() {
    this.newLine = null;
    this.startInfo = {};
  }

  clear() {
    this.newLine = null;
    this.startInfo = {};
  }
}

const addLine = new AddLine();
export { addLine };