Angelmaneuver/unit-converter

import { AbstractQuickPickSelectGuide } from './base/pick';
import { State }                        from './base/base';

const items = {
    p2r:       { label: '$(export) px => rem',     description: 'Converts a px value to a rem value.' },
    r2p:       { label: '$(export) rem => px',     description: 'Converts a rem value to a px value.' },
    basePx:    { label: '$(whitespace) Base px',   description: 'Set the base px size to be used for conversion.' },
    clipboard: { label: '$(go-to-file) Clipboard', description: 'Set the clipboard setting.' },
    uninstall: { label: '$(trashcan) Uninstall',   description: 'Remove all parameters for this extension.' },
    exit:      { label: '$(sign-out) Exit',        description: 'Exit this extenion.' },
};

export class StartMenuGuide extends AbstractQuickPickSelectGuide {
    public init(): void {
        super.init();

        this.placeholder = 'Select the item you want to do.';
        this.items       = this.items.concat(items.p2r, items.r2p, items.basePx, items.clipboard, items.uninstall, items.exit);
    }

    protected getExecute(label: string | undefined): (() => Promise<void>) | undefined {
        switch (label) {
            case items.p2r.label:
                return this.setNext('PixelSizeGuide', this.createBaseState(' - PX to REM', 'convert', 1));
            case items.r2p.label:
                return this.setNext('RemSizeGuide',   this.createBaseState(' - REM to PX', 'convert', 1));
            case items.basePx.label:
                return this.setNext('BasePixelSizeGuide', this.createBaseState(' - Set the Base px', 'settingBasePx'));
            case items.clipboard.label:
                return this.setNext('ClipboardGuide', this.createBaseState(' - Set the clipboard setting', 'settingSendClipboard'));
            case items.uninstall.label:
                return this.uninstall();
            default:
                return undefined;
        }
    }

    private setNext(className: string, state: Partial<State>): () => Promise<void> {
        return async () => {
            this.setNextSteps([{ key: className, state: state }]);
        };
    }

    private uninstall(): () => Promise<void> {
        return async () => {
            this.state.placeholder = 'Do you want to uninstall the all settings related to this extension?';
            this.setNextSteps([{
                key:   'BaseConfirmGuide',
                state: { title: this.title },
                args:  [
                    { yes: 'Uninstall.', no: 'Back to previous.' },
                    ( async () => {
                        this.settings.setBasePx(16);
                        this.settings.setSendClipboard(true);
                    } )
                ]
            }]);
        };
    }
}