--- /dev/null
+'use strict';
+
+var SCALAR_TYPES = ['number', 'integer', 'string', 'boolean', 'null'];
+
+module.exports = function defFunc(ajv) {
+ defFunc.definition = {
+ type: 'array',
+ compile: function(keys, parentSchema, it) {
+ var equal = it.util.equal;
+ var scalar = getScalarKeys(keys, parentSchema);
+
+ return function(data) {
+ if (data.length > 1) {
+ for (var k=0; k < keys.length; k++) {
+ var i, key = keys[k];
+ if (scalar[k]) {
+ var hash = {};
+ for (i = data.length; i--;) {
+ if (!data[i] || typeof data[i] != 'object') continue;
+ var prop = data[i][key];
+ if (prop && typeof prop == 'object') continue;
+ if (typeof prop == 'string') prop = '"' + prop;
+ if (hash[prop]) return false;
+ hash[prop] = true;
+ }
+ } else {
+ for (i = data.length; i--;) {
+ if (!data[i] || typeof data[i] != 'object') continue;
+ for (var j = i; j--;) {
+ if (data[j] && typeof data[j] == 'object' && equal(data[i][key], data[j][key]))
+ return false;
+ }
+ }
+ }
+ }
+ }
+ return true;
+ };
+ },
+ metaSchema: {
+ type: 'array',
+ items: {type: 'string'}
+ }
+ };
+
+ ajv.addKeyword('uniqueItemProperties', defFunc.definition);
+ return ajv;
+};
+
+
+function getScalarKeys(keys, schema) {
+ return keys.map(function(key) {
+ var properties = schema.items && schema.items.properties;
+ var propType = properties && properties[key] && properties[key].type;
+ return Array.isArray(propType)
+ ? propType.indexOf('object') < 0 && propType.indexOf('array') < 0
+ : SCALAR_TYPES.indexOf(propType) >= 0;
+ });
+}