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var path = require('path');
var url = require('url');
var isRemoteResource = require('../utils/is-remote-resource');
var hasProtocol = require('../utils/has-protocol');
var HTTP_PROTOCOL = 'http:';
function isAllowedResource(uri, isRemote, rules) {
var match;
var absoluteUri;
var allowed = isRemote ? false : true;
var rule;
var isNegated;
var normalizedRule;
var i;
if (rules.length === 0) {
return false;
}
if (isRemote && !hasProtocol(uri)) {
uri = HTTP_PROTOCOL + uri;
}
match = isRemote ?
url.parse(uri).host :
uri;
absoluteUri = isRemote ?
uri :
path.resolve(uri);
for (i = 0; i < rules.length; i++) {
rule = rules[i];
isNegated = rule[0] == '!';
normalizedRule = rule.substring(1);
if (isNegated && isRemote && isRemoteRule(normalizedRule)) {
allowed = allowed && !isAllowedResource(uri, true, [normalizedRule]);
} else if (isNegated && !isRemote && !isRemoteRule(normalizedRule)) {
allowed = allowed && !isAllowedResource(uri, false, [normalizedRule]);
} else if (isNegated) {
allowed = allowed && true;
} else if (rule == 'all') {
allowed = true;
} else if (isRemote && rule == 'local') {
allowed = allowed || false;
} else if (isRemote && rule == 'remote') {
allowed = true;
} else if (!isRemote && rule == 'remote') {
allowed = false;
} else if (!isRemote && rule == 'local') {
allowed = true;
} else if (rule === match) {
allowed = true;
} else if (rule === uri) {
allowed = true;
} else if (isRemote && absoluteUri.indexOf(rule) === 0) {
allowed = true;
} else if (!isRemote && absoluteUri.indexOf(path.resolve(rule)) === 0) {
allowed = true;
} else if (isRemote != isRemoteRule(normalizedRule)) {
allowed = allowed && true;
} else {
allowed = false;
}
}
return allowed;
}
function isRemoteRule(rule) {
return isRemoteResource(rule) || url.parse(HTTP_PROTOCOL + '//' + rule).host == rule;
}
module.exports = isAllowedResource;