mip-validator/src/rule-parser.js

MIP validator

const _ = require('lodash')
const assert = require('assert')
const matcher = require('./matcher.js')
const defaultRules = require('../rules.json')
const TYPED_RULES = {
    custom: require('../rules-custom.json')
}

var id = 0

function normalize(rules) {
    return _.chain(rules || defaultRules)
        .toPairs()
        .map(pair => [
            pair[0],
            normalizeArray(pair[1]).map(tag => normalizeTag(tag))
        ])
        .fromPairs()
        .value()
}

function normalizeArray(v) {
    if (!v) {
        return []
    }
    if (v === true) {
        v = {}
    }
    if (!_.isArray(v)) {
        v = [v]
    }
    return v
}

function normalizeAttrs(attrs) {
    return _.chain(attrs)
        .toPairs()
        .map(pair => [pair[0], normalizeArray(pair[1])])
        .fromPairs()
        .value()
}

function normalizeTag(config) {
    assert(_.isObject(config), 'node name should be Array or Object')

    config.mandatory = normalizeArray(config.mandatory)
    config.duplicate = normalizeArray(config.duplicate)
    config.attrs = normalizeAttrs(config.attrs)
    return config
}

function processNodeRules(nodes) {
    var regexNodes = {}
        // for each node
    _.forEach(nodes, (rules, name) => {
        if (matcher.regexSyntax.test(name)) {
            rules.regexStr = name
            regexNodes[name] = rules
        }
        _.forEach(rules, processNodeRule)
    })
    return regexNodes
}

function processNodeRule(nodeRule) {
    nodeRule.id = id++
    nodeRule.regexAttrs = {}
    _.forEach(nodeRule.attrs, (rules, name) => {
        if (matcher.regexSyntax.test(name)) {
            rules.regexStr = name
            nodeRule.regexAttrs[name] = rules
        }
        _.forEach(rules, processAttrRule)
    })
}

function processAttrRule(attrRule) {
    attrRule.id = id++
}

function mkConfig(rules) {
    var normalizedRules = normalize(rules)
    var regexNodes = processNodeRules(normalizedRules)
    return {
        rules: normalizedRules,
        rawRules: rules,
        regexNodes: regexNodes
    }
}

function typedRules(type) {
    var rules = TYPED_RULES[type]
    if (!rules) {
        throw new Error('rules not found for type ' + type)
    }
    return rules
}

exports.mkConfig = mkConfig
exports.typedRules = typedRules
exports.normalize = normalize