1 files changed, 121 insertions, 0 deletions
diff --git a/node_modules/js-yaml/lib/schema.js b/node_modules/js-yaml/lib/schema.js
new file mode 100644
index 0000000..65b41f4
--- /dev/null
+++ b/node_modules/js-yaml/lib/schema.js
@@ -0,0 +1,121 @@
+'use strict';
+
+/*eslint-disable max-len*/
+
+var YAMLException = require('./exception');
+var Type          = require('./type');
+
+
+function compileList(schema, name) {
+  var result = [];
+
+  schema[name].forEach(function (currentType) {
+    var newIndex = result.length;
+
+    result.forEach(function (previousType, previousIndex) {
+      if (previousType.tag === currentType.tag &&
+          previousType.kind === currentType.kind &&
+          previousType.multi === currentType.multi) {
+
+        newIndex = previousIndex;
+      }
+    });
+
+    result[newIndex] = currentType;
+  });
+
+  return result;
+}
+
+
+function compileMap(/* lists... */) {
+  var result = {
+        scalar: {},
+        sequence: {},
+        mapping: {},
+        fallback: {},
+        multi: {
+          scalar: [],
+          sequence: [],
+          mapping: [],
+          fallback: []
+        }
+      }, index, length;
+
+  function collectType(type) {
+    if (type.multi) {
+      result.multi[type.kind].push(type);
+      result.multi['fallback'].push(type);
+    } else {
+      result[type.kind][type.tag] = result['fallback'][type.tag] = type;
+    }
+  }
+
+  for (index = 0, length = arguments.length; index < length; index += 1) {
+    arguments[index].forEach(collectType);
+  }
+  return result;
+}
+
+
+function Schema(definition) {
+  return this.extend(definition);
+}
+
+
+Schema.prototype.extend = function extend(definition) {
+  var implicit = [];
+  var explicit = [];
+
+  if (definition instanceof Type) {
+    // Schema.extend(type)
+    explicit.push(definition);
+
+  } else if (Array.isArray(definition)) {
+    // Schema.extend([ type1, type2, ... ])
+    explicit = explicit.concat(definition);
+
+  } else if (definition && (Array.isArray(definition.implicit) || Array.isArray(definition.explicit))) {
+    // Schema.extend({ explicit: [ type1, type2, ... ], implicit: [ type1, type2, ... ] })
+    if (definition.implicit) implicit = implicit.concat(definition.implicit);
+    if (definition.explicit) explicit = explicit.concat(definition.explicit);
+
+  } else {
+    throw new YAMLException('Schema.extend argument should be a Type, [ Type ], ' +
+      'or a schema definition ({ implicit: [...], explicit: [...] })');
+  }
+
+  implicit.forEach(function (type) {
+    if (!(type instanceof Type)) {
+      throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
+    }
+
+    if (type.loadKind && type.loadKind !== 'scalar') {
+      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
+    }
+
+    if (type.multi) {
+      throw new YAMLException('There is a multi type in the implicit list of a schema. Multi tags can only be listed as explicit.');
+    }
+  });
+
+  explicit.forEach(function (type) {
+    if (!(type instanceof Type)) {
+      throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
+    }
+  });
+
+  var result = Object.create(Schema.prototype);
+
+  result.implicit = (this.implicit || []).concat(implicit);
+  result.explicit = (this.explicit || []).concat(explicit);
+
+  result.compiledImplicit = compileList(result, 'implicit');
+  result.compiledExplicit = compileList(result, 'explicit');
+  result.compiledTypeMap  = compileMap(result.compiledImplicit, result.compiledExplicit);
+
+  return result;
+};
+
+
+module.exports = Schema;