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validator.js
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validator.js
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// jshint node:true
// jshint shadow:true
module.exports = {
validate: validate,
clearCache: clearCache
};
var fs = require('fs');
var xpath = require('xpath');
var dom = require('xmldom').DOMParser;
var crypto = require('crypto');
var parseSchematron = require('./parseSchematron');
var testAssertion = require('./testAssertion');
var includeExternalDocument = require('./includeExternalDocument');
// Parsed object cache
var parsedMap = {};
function clearCache() {
parsedMap = {};
}
function validate(xml, schematron, options) {
// Context cache
var contextMap = {};
var options = options || {};
var includeWarnings = options.includeWarnings === undefined ? true : options.includeWarnings;
var resourceDir = options.resourceDir || './';
var xmlSnippetMaxLength = options.xmlSnippetMaxLength === undefined ? 200 : options.xmlSnippetMaxLength;
// If not validate xml, it might be a filepath
if (xml.trim().indexOf('<')) {
try {
xml = fs.readFileSync(xml, 'utf-8').toString();
}
catch (err) {
}
}
// If not validate xml, it might be a filepath
var schematronPath = null;
if (schematron.trim().indexOf('<')) {
try {
var temp = schematron;
schematron = fs.readFileSync(schematron, 'utf-8').toString();
schematronPath = temp;
}
catch (err) {
}
}
// Load xml doc
var xmlDoc = new dom().parseFromString(xml);
var hash = crypto.createHash('md5').update(schematron).digest('hex');
var s = parsedMap[hash];
// If not in cache
if (!s) {
// Load schematron doc
var schematronDoc = new dom().parseFromString(schematron);
// Parse schematron
var s = parseSchematron(schematronDoc);
// Cache parsed schematron
parsedMap[hash] = s;
}
// Extract data from parsed schematron object
var namespaceMap = s.namespaceMap;
var patternRuleMap = s.patternRuleMap;
var ruleAssertionMap = s.ruleAssertionMap;
// Create selector object, initialized with namespaces
var select = xpath.useNamespaces(namespaceMap);
var errors = [];
var warnings = [];
var ignored = [];
for (var pattern in patternRuleMap) {
if (patternRuleMap.hasOwnProperty(pattern)) {
var patternId = pattern;
var rules = patternRuleMap[pattern];
for (var i = 0; i < rules.length; i++) {
if (!ruleAssertionMap[rules[i]].abstract) {
var ruleId = rules[i];
var context = ruleAssertionMap[rules[i]].context;
var assertionResults = checkRule(rules[i]);
for (var j = 0; j < assertionResults.length; j++) {
var type = assertionResults[j].type;
var assertionId = assertionResults[j].assertionId;
var test = assertionResults[j].test;
var simplifiedTest = assertionResults[j].simplifiedTest;
var description = assertionResults[j].description;
var results = assertionResults[j].results;
if (!results.ignored) {
for (var k = 0; k < results.length; k++) {
var result = results[k].result;
var line = results[k].line;
var path = results[k].path;
var xmlSnippet = results[k].xml;
if (!result) {
var obj = {
type: type,
test: test,
simplifiedTest: simplifiedTest,
description: description,
line: line,
path: path,
patternId: patternId,
ruleId: ruleId,
assertionId: assertionId,
context: context,
xml: xmlSnippet
};
if (type === 'error') {
errors.push(obj);
}
else {
warnings.push(obj);
}
}
}
}
else {
var obj = {
errorMessage: results.errorMessage,
type: type,
test: test,
simplifiedTest: simplifiedTest,
description: description,
patternId: patternId,
ruleId: ruleId,
assertionId: assertionId,
context: context
};
ignored.push(obj);
}
}
}
}
}
}
return {
errorCount: errors.length,
warningCount: warnings.length,
ignoredCount: ignored.length,
errors: errors,
warnings: warnings,
ignored: ignored
};
function checkRule(rule, contextOverride) {
var results = [];
var assertionsAndExtensions = ruleAssertionMap[rule].assertionsAndExtensions;
var context = contextOverride || ruleAssertionMap[rule].context;
// Determine the sections within context, load selected section from cache if possible
var selected = contextMap[context];
var contextModified = context;
if (!selected) {
if (context) {
if (context.indexOf('/')) {
contextModified = '//' + context;
}
selected = select(contextModified, xmlDoc);
}
else {
selected = [xmlDoc];
}
contextMap[context] = selected;
}
for (var i = 0; i < assertionsAndExtensions.length; i++) {
if (assertionsAndExtensions[i].type === 'assertion') {
var type = assertionsAndExtensions[i].level;
var test = assertionsAndExtensions[i].test;
// Extract values from external document and modify test if a document call is made
var originalTest = test;
try {
test = includeExternalDocument(test, resourceDir);
}
catch (err) {
return { ignored: true, errorMessage: err.message };
}
var simplifiedTest = null;
if (originalTest !== test) {
simplifiedTest = test;
}
if (type === 'error' || includeWarnings) {
results.push({
type: type,
assertionId: assertionsAndExtensions[i].id,
test: originalTest,
simplifiedTest: simplifiedTest,
description: assertionsAndExtensions[i].description,
results: testAssertion(test, selected, select, xmlDoc, resourceDir, xmlSnippetMaxLength)
});
}
}
else {
results = results.concat(checkRule(assertionsAndExtensions[i].rule, context));
}
}
return results;
}
}