import { BiMap } from "@/util/bi-map";


export class NamespaceTable {
    OPC_UA = "http://opcfoundation.org/UA/";
    nsMap = new BiMap<number, string>();

    constructor() {
        this.nsMap.set(0, this.OPC_UA)
    }

    addUri(uri: string):number|undefined {
        if(this.nsMap.hasValue(uri)) {
            return this.nsMap.getFromValue(uri);
        } else {
            let index=1;
            while (this.nsMap.hasKey(index)) {
                index = index + 1;
            }
            this.nsMap.set(index, uri);
            return index;
        }
    }

    putUri(uri: string, index: number): void {
        this.nsMap.set(index, uri);
    }

    getUri(index: number): string|undefined {
        return this.nsMap.get(index);
    }

    getIndex(uri: string) : number|undefined {
        return this.nsMap.getFromValue(uri);
    }
}