drawing-board/src/board/shared/util.ts

import { reactive, watch } from "vue";
import { Attrib, GetSetPick } from "../type";
import { inRevise, toRawType } from "./public";
import { Shape } from "konva/lib/Shape";
import { Group } from "konva/lib/Group";

export const setShapeConfig = <T extends Group | Shape>(
  shape: T,
  config: GetSetPick<T>
) => {
  for (const key in config) {
    if (typeof shape[key as any] === "function") {
      shape[key as any](config[key]);
    }
  }
};

export const getChangePart = <T>(newIds: T[], oldIds: T[] = []) => {
  const addPort = newIds.filter((newId) => !oldIds.includes(newId));
  const delPort = oldIds.filter((oldId) => !newIds.includes(oldId));
  const holdPort = oldIds.filter((oldId) => newIds.includes(oldId));

  return { addPort, delPort, holdPort };
};

export const getChangeAllPoart = <T extends Attrib>(
  newAttribs: T[],
  oldAttribs: T[]
) => {
  const newIds = newAttribs.map(({ id }) => id);
  const oldIds = oldAttribs.map(({ id }) => id);
  const ports = getChangePart(newIds, oldIds);

  // 数组子项引用变化
  const changePort = newAttribs
    .filter(
      (newAttrib) =>
        !oldAttribs.includes(newAttrib) && oldIds.includes(newAttrib.id)
    )
    .map((attrib) => attrib.id);
  oldAttribs = newAttribs;

  return { ...ports, changePort };
};

type AttribsChange = ReturnType<typeof getChangePart> & {
  changePort: string[];
};
export const watchAttribs = (
  attribs: Attrib[],
  callback: (data: AttribsChange) => void,
  immediate = true
) => {
  return watch(
    () => [...attribs],
    (newAttribs, oldAttribs = []) => {
      callback(getChangeAllPoart(newAttribs, oldAttribs));
    },
    { immediate, flush: "sync" }
  );
};

export const deptComputed = <T extends Record<string, any>>(
  getter: () => T
) => {
  const data = reactive(getter());
  const stop = watch(getter, (newData) => {
    if (inRevise(data, newData)) {
      if (Array.isArray(newData)) {
        newData.forEach((item, ndx) => {
          data[ndx] = item;
        });
      } else {
        Object.keys(data).forEach((key) => delete data[key]);
        Object.assign(data, newData);
      }
    }
  });
  return {
    data: data as T,
    stop,
  };
};

export const partialComputed = <T extends Attrib>(getter: () => T[]) => {
  const data = reactive(getter()) as T[];
  const stop = watch(getter, (newData, oldData) => {
    const { addPort, delPort, changePort } = getChangeAllPoart(
      newData,
      oldData
    );
    for (const delId of delPort) {
      const ndx = data.findIndex((i) => i.id === delId);
      ~ndx && data.splice(ndx, 1);
    }
    for (const addId of addPort) {
      const addItem = newData.find((i) => i.id === addId);
      addItem && data.push(addItem);
    }

    for (const changeId of changePort) {
      const dataNdx = data.findIndex((i) => i.id === changeId);
      const newDataNdx = newData.findIndex((i) => i.id === changeId);
      if (inRevise(data[dataNdx], newData[newDataNdx])) {
        data[dataNdx] = newData[newDataNdx];
      }
    }
  });

  return {
    data,
    stop,
  };
};

export const depPartialUpdate = <T>(newData: T, oldData: T): T => {
  if (!inRevise(newData, oldData)) {
    return oldData;
  }
  if (!oldData) {
    return newData;
  }

  const nData = newData as any,
    oData = oldData as any;
  const type = toRawType(nData);

  if (toRawType(oldData) !== type) {
    return newData;
  }

  switch (type) {
    case "Array":
      if (nData[0]?.id || oData[0]?.id) {
        var { changePort, addPort, delPort } = getChangeAllPoart(nData, oData);

        addPort.forEach((qid) => {
          oData.push(nData.find(({ id }) => id === qid));
        });
        delPort.forEach((dId) => {
          const ndx = oData.findIndex(({ id }) => id === dId);
          ~ndx && oData.splice(ndx, 1);
        });
        changePort.forEach((cId) => {
          const nItem = nData.find(({ id }) => id === cId);
          const ndx = oData.findIndex(({ id }) => id === cId);

          oData[ndx] = depPartialUpdate(nItem, oData[ndx]);
        });
      } else {
        for (let i = 0; i < nData.length; i++) {
          oData[i] = depPartialUpdate(nData[i], oData[i]);
        }
        while (oData.length !== nData.length) {
          oData.pop();
        }
      }

      break;
    case "Object":
      const oKeys = Object.keys(oData).sort();
      const nKeys = Object.keys(nData).sort();
      var { addPort, delPort, holdPort } = getChangePart(nKeys, oKeys);

      for (let i = 0; i < holdPort.length; i++) {
        oData[oKeys[i]] = depPartialUpdate(
          nData[holdPort[i]],
          oData[holdPort[i]]
        );
      }
      addPort.forEach((key) => (oData[key] = nData[key]));
      delPort.forEach((key) => delete oData[key]);
      break;
    default:
      return newData;
  }
  return oldData;
};