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website/functions/node_modules/protobufjs/src/mapfield.js

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+"use strict";
+module.exports = MapField;
+
+// extends Field
+var Field = require("./field");
+((MapField.prototype = Object.create(Field.prototype)).constructor = MapField).className = "MapField";
+
+var types   = require("./types"),
+    util    = require("./util");
+
+/**
+ * Constructs a new map field instance.
+ * @classdesc Reflected map field.
+ * @extends FieldBase
+ * @constructor
+ * @param {string} name Unique name within its namespace
+ * @param {number} id Unique id within its namespace
+ * @param {string} keyType Key type
+ * @param {string} type Value type
+ * @param {Object.<string,*>} [options] Declared options
+ * @param {string} [comment] Comment associated with this field
+ */
+function MapField(name, id, keyType, type, options, comment) {
+    Field.call(this, name, id, type, undefined, undefined, options, comment);
+
+    /* istanbul ignore if */
+    if (!util.isString(keyType))
+        throw TypeError("keyType must be a string");
+
+    /**
+     * Key type.
+     * @type {string}
+     */
+    this.keyType = keyType; // toJSON, marker
+
+    /**
+     * Resolved key type if not a basic type.
+     * @type {ReflectionObject|null}
+     */
+    this.resolvedKeyType = null;
+
+    // Overrides Field#map
+    this.map = true;
+}
+
+/**
+ * Map field descriptor.
+ * @interface IMapField
+ * @extends {IField}
+ * @property {string} keyType Key type
+ */
+
+/**
+ * Extension map field descriptor.
+ * @interface IExtensionMapField
+ * @extends IMapField
+ * @property {string} extend Extended type
+ */
+
+/**
+ * Constructs a map field from a map field descriptor.
+ * @param {string} name Field name
+ * @param {IMapField} json Map field descriptor
+ * @returns {MapField} Created map field
+ * @throws {TypeError} If arguments are invalid
+ */
+MapField.fromJSON = function fromJSON(name, json) {
+    return new MapField(name, json.id, json.keyType, json.type, json.options, json.comment);
+};
+
+/**
+ * Converts this map field to a map field descriptor.
+ * @param {IToJSONOptions} [toJSONOptions] JSON conversion options
+ * @returns {IMapField} Map field descriptor
+ */
+MapField.prototype.toJSON = function toJSON(toJSONOptions) {
+    var keepComments = toJSONOptions ? Boolean(toJSONOptions.keepComments) : false;
+    return util.toObject([
+        "keyType" , this.keyType,
+        "type"    , this.type,
+        "id"      , this.id,
+        "extend"  , this.extend,
+        "options" , this.options,
+        "comment" , keepComments ? this.comment : undefined
+    ]);
+};
+
+/**
+ * @override
+ */
+MapField.prototype.resolve = function resolve() {
+    if (this.resolved)
+        return this;
+
+    // Besides a value type, map fields have a key type that may be "any scalar type except for floating point types and bytes"
+    if (types.mapKey[this.keyType] === undefined)
+        throw Error("invalid key type: " + this.keyType);
+
+    return Field.prototype.resolve.call(this);
+};
+
+/**
+ * Map field decorator (TypeScript).
+ * @name MapField.d
+ * @function
+ * @param {number} fieldId Field id
+ * @param {"int32"|"uint32"|"sint32"|"fixed32"|"sfixed32"|"int64"|"uint64"|"sint64"|"fixed64"|"sfixed64"|"bool"|"string"} fieldKeyType Field key type
+ * @param {"double"|"float"|"int32"|"uint32"|"sint32"|"fixed32"|"sfixed32"|"int64"|"uint64"|"sint64"|"fixed64"|"sfixed64"|"bool"|"string"|"bytes"|Object|Constructor<{}>} fieldValueType Field value type
+ * @returns {FieldDecorator} Decorator function
+ * @template T extends { [key: string]: number | Long | string | boolean | Uint8Array | Buffer | number[] | Message<{}> }
+ */
+MapField.d = function decorateMapField(fieldId, fieldKeyType, fieldValueType) {
+
+    // submessage value: decorate the submessage and use its name as the type
+    if (typeof fieldValueType === "function")
+        fieldValueType = util.decorateType(fieldValueType).name;
+
+    // enum reference value: create a reflected copy of the enum and keep reuseing it
+    else if (fieldValueType && typeof fieldValueType === "object")
+        fieldValueType = util.decorateEnum(fieldValueType).name;
+
+    return function mapFieldDecorator(prototype, fieldName) {
+        util.decorateType(prototype.constructor)
+            .add(new MapField(fieldName, fieldId, fieldKeyType, fieldValueType));
+    };
+};