inject.ts

import {EventConfigs} from './types';
interface injectArgs<T extends [any, EventConfigs]> {
    mold: T,
    with?: T,
    tbdSlots?: {
        of?: EventTarget,
        on?: string,
    } 
}
export function inject<T extends [any, EventConfigs]>({mold, with: w, tbdSlots}: injectArgs<T>): T{
    const into1 = mold[1];
    if(w !== undefined){
        const me0 = w[0];
        const into0 = mold[0];
        if(into0 !== undefined) Object.assign(into0, me0);
        const me1 = w[1];
        if(me1 !== undefined){
            for(const key in me1){
                const into1val = into1[key];
                if(into1val !== undefined){
                    Object.assign(into1val, me1[key]);
                }else{
                    into1[key] = me1[key];
                }
            }
        }

    }
    if(tbdSlots !== undefined){
        const props = Object.keys(tbdSlots);
        for(const val of Object.values(into1)){
            for(const prop of props){
                if((val as any)[prop] === 'tbd'){
                    (val as any)[prop] = (tbdSlots as any)[prop];
                }
                const abort = (val as any).abort;
                if(abort?.[prop] === 'tbd'){
                    abort[prop] = (tbdSlots as any)[prop];
                }
            }
        }
    }
    return mold;
}