ScaleRangePromptStep.ts

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import { AzureWizardPromptStep } from '@microsoft/vscode-azext-utils';
import { localize } from '../../../utils/localize';
import type { ScaleRangeContext } from './ScaleRangeContext';

export class ScaleRangePromptStep extends AzureWizardPromptStep<ScaleRangeContext> {
    public async prompt(context: ScaleRangeContext): Promise<void> {
        const scaleRange: string = (await context.ui.showInputBox({
            prompt: localize('editScalingRange', 'Set the range of application replicas that get created in response to a scale rule. Set any range within the minimum of 0 and the maximum of 10 replicas'),
            value: `${context.scaleMinRange}-${context.scaleMaxRange}`,
            validateInput: this.validateInput,
        })).trim();

        const [min, max] = scaleRange.split('-').map(range => Number(range));
        context.newMinRange = min;
        context.newMaxRange = max;
    }

    public shouldPrompt(context: ScaleRangeContext): boolean {
        return !context.newMinRange || !context.newMaxRange;
    }

    private validateInput(range: string | undefined): string | undefined {
        const formatRegex = /^\d{1,2}-\d{1,2}$/;
        if (!range || !formatRegex.test(range)) {
            return localize('enterRange', 'Please enter the range in the following format "0-10"');
        }

        const [min, max] = range.split('-').map(range => Number(range));
        if (min > 10 || max > 10) {
            return localize('maxRangeExceeded', 'The maximum number of replicas is 10.');
        } else if (min > max) {
            return localize('minHigherThanMax', 'The minimum range cannot be larger than the maximum range.');
        } else if (max === 0) {
            return localize('maxGreaterThan0', 'The maximum replicas must be greater than 0.');
        }

        return undefined;
    }
}