botbuilder-dialogs-adaptive/lib/selectors/conditionalSelector.js

Rule system for the Microsoft BotBuilder dialog system.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ConditionalSelector = void 0;
const triggerSelector_1 = require("../triggerSelector");
const adaptive_expressions_1 = require("adaptive-expressions");
/**
 * Select between two rule selectors based on a condition.
 */
class ConditionalSelector extends triggerSelector_1.TriggerSelector {
    constructor() {
        super(...arguments);
        /**
         * Gets or sets the expression parser to use.
         */
        this.parser = new adaptive_expressions_1.ExpressionParser();
    }
    /**
     * Gets the converter for the selector configuration.
     *
     * @param property The key of the conditional selector configuration.
     * @returns The converter for the selector configuration.
     */
    getConverter(property) {
        switch (property) {
            case 'condition':
                return new adaptive_expressions_1.BoolExpressionConverter();
            default:
                return super.getConverter(property);
        }
    }
    /**
     * Initialize the selector with the set of rules.
     *
     * @param conditionals Possible rules to match.
     * @param evaluate True if rules should be evaluated on select.
     */
    initialize(conditionals, evaluate) {
        this._conditionals = conditionals;
        this._evaluate = evaluate;
    }
    /**
     * Select the best rule to execute.
     *
     * @param actionContext Dialog context for evaluation.
     * @returns A Promise with a number array.
     */
    select(actionContext) {
        let selector;
        if (this.condition && this.condition.getValue(actionContext.state)) {
            selector = this.ifTrue;
            this.ifTrue.initialize(this._conditionals, this._evaluate);
        }
        else {
            selector = this.ifFalse;
            this.ifFalse.initialize(this._conditionals, this._evaluate);
        }
        return selector.select(actionContext);
    }
}
exports.ConditionalSelector = ConditionalSelector;
ConditionalSelector.$kind = 'Microsoft.ConditionalSelector';
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