zcatalyst-cli/lib/express_middlewares/apig-matcher.js

Command Line Tool for CATALYST

'use strict';
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = (_REQ, res, next) => {
    if (res.locals.apigRules === undefined) {
        next(new Error('INVALID_URL'));
        return;
    }
    const matchedRules = res.locals.apigRules;
    let bestRule = matchedRules[0];
    let maxPartLength = -1;
    bestRule = matchedRules.reduce((accumulator, rule) => {
        let setAsBest = false;
        const partsLength = rule.source_endpoint.split('/').length;
        if (partsLength === maxPartLength) {
            const currentGrpCount = rule.source_endpoint.split('/').reduce((count, part) => {
                return part.startsWith(':') ? ++count : count;
            }, 0);
            const prevGrpCount = accumulator.source_endpoint.split('/').reduce((count, part) => {
                return part.startsWith(':') ? ++count : count;
            }, 0);
            if (currentGrpCount < prevGrpCount) {
                setAsBest = true;
                maxPartLength = partsLength;
            }
            else if (currentGrpCount === prevGrpCount) {
                const currentTotalLen = rule.source_endpoint.length;
                const prevTotalLen = accumulator.source_endpoint.length;
                if (currentTotalLen < prevTotalLen) {
                    setAsBest = true;
                    maxPartLength = partsLength;
                }
            }
        }
        else if (partsLength > maxPartLength) {
            setAsBest = true;
            maxPartLength = partsLength;
        }
        if (setAsBest) {
            accumulator = rule;
        }
        return accumulator;
    }, bestRule);
    res.locals.bestRule = bestRule;
    delete res.locals.apigRules;
    next();
};