node puppetterでwait系の処理を結構書いたので、メモ

const Util = require('./util');

const wait = {
    /**
     * 指定時間処理を止める
     */
    sleep : async (time)=>{
        if(time === undefined){
            time = process.env.puppet_wait_ms;
        }
        return new Promise(resolve => {
            setTimeout(() => {
                resolve();  
            }, time);
        });
    },
    /**
     * 指定のエレメントにselecter要素が表示されるまで待つ
     * @param  ElementHandle  elem puppeteerのElementHandle
     * @param  string  selecter
     * @return Promise  listで返す
     */
    forChildSelecter:async (elem,selecter) =>{
        let isShow = false;
        let targElms = {};
        for(let i = 1 ; i <= process.env.puppet_wait_count; i++){
            targElms = await elem.$$(selecter);
            if(targElms.length > 0){
                isShow = true;
                break;
            }
            await wait.sleep();
        }
        if(isShow === false){
            throw new Error(process.env.puppet_wait_count+'回待ったけどダメ!');
        }else{
            return targElms;
        }
    },
    /**
     * 指定のエレメントの中のselecter要素が消えるまで待つ
     * @param  ElementHandle  elem puppeteerのElementHandle
     * @param  string  selecter
     */
    forChildSelecterHide: async(elm,selecter)=>{
        let isShow = true;
        let targElms = {};
        for(let i = 1 ; i <= process.env.puppet_wait_count; i++){
            targElms = await elm.$$(selecter);
            if(targElms.length == 0){
                isShow = false;
                break;
            }
            await wait.sleep();
        }
        if(isShow === true){
            throw new Error(process.env.puppet_wait_count+'回待ったけどダメ!');
        }else{
            return true;
        }
    },
    /**
     * 指定のエレメントの中のselecter要素が作られて、消えるまで待つ
     * @param  ElementHandle  elem puppeteerのElementHandle
     * @param  string  selecter
     */
    forChildSelecterShowAndHide:async (elm,selecter)=>{
        await wait.forChildSelecter(elm,selecter);
        await wait.forChildSelecterHide(elm,selecter);
        return true;
    },
    /**
    * ElementHandleから指定のClassNameが無くなるのを待つ。
    * 再帰確認時間はenv.puppet_waitでms
    */
    removeClass : async (elem,targClassName)=>{
        let isRemove = false;
        for(let i = 1 ; i <= process.env.puppet_wait_count; i++){
            let handle = await elem.getProperty('className');
            let classNames = await handle.jsonValue();
            if(classNames.indexOf(targClassName) == -1){
                isRemove = true;
                break;
            }
            await wait.sleep();
        }
        if(isRemove === false){
            throw new Error(process.env.puppet_wait_count+'回待ったけどダメ!');
        }else{
            return true;
        }
    }
};
module.exports = wait;