Initial Commit

node_modules/protobufjs/src/root.js

@@ -0,0 +1,404 @@
+"use strict";
+module.exports = Root;
+
+// extends Namespace
+var Namespace = require("./namespace");
+((Root.prototype = Object.create(Namespace.prototype)).constructor = Root).className = "Root";
+
+var Field   = require("./field"),
+    Enum    = require("./enum"),
+    OneOf   = require("./oneof"),
+    util    = require("./util");
+
+var Type,   // cyclic
+    parse,  // might be excluded
+    common; // "
+
+/**
+ * Constructs a new root namespace instance.
+ * @classdesc Root namespace wrapping all types, enums, services, sub-namespaces etc. that belong together.
+ * @extends NamespaceBase
+ * @constructor
+ * @param {Object.<string,*>} [options] Top level options
+ */
+function Root(options) {
+    Namespace.call(this, "", options);
+
+    /**
+     * Deferred extension fields.
+     * @type {Field[]}
+     */
+    this.deferred = [];
+
+    /**
+     * Resolved file names of loaded files.
+     * @type {string[]}
+     */
+    this.files = [];
+
+    /**
+     * Edition, defaults to proto2 if unspecified.
+     * @type {string}
+     * @private
+     */
+    this._edition = "proto2";
+
+    /**
+     * Global lookup cache of fully qualified names.
+     * @type {Object.<string,ReflectionObject>}
+     * @private
+     */
+    this._fullyQualifiedObjects = {};
+}
+
+/**
+ * Loads a namespace descriptor into a root namespace.
+ * @param {INamespace} json Namespace descriptor
+ * @param {Root} [root] Root namespace, defaults to create a new one if omitted
+ * @returns {Root} Root namespace
+ */
+Root.fromJSON = function fromJSON(json, root) {
+    if (!root)
+        root = new Root();
+    if (json.options)
+        root.setOptions(json.options);
+    return root.addJSON(json.nested).resolveAll();
+};
+
+/**
+ * Resolves the path of an imported file, relative to the importing origin.
+ * This method exists so you can override it with your own logic in case your imports are scattered over multiple directories.
+ * @function
+ * @param {string} origin The file name of the importing file
+ * @param {string} target The file name being imported
+ * @returns {string|null} Resolved path to `target` or `null` to skip the file
+ */
+Root.prototype.resolvePath = util.path.resolve;
+
+/**
+ * Fetch content from file path or url
+ * This method exists so you can override it with your own logic.
+ * @function
+ * @param {string} path File path or url
+ * @param {FetchCallback} callback Callback function
+ * @returns {undefined}
+ */
+Root.prototype.fetch = util.fetch;
+
+// A symbol-like function to safely signal synchronous loading
+/* istanbul ignore next */
+function SYNC() {} // eslint-disable-line no-empty-function
+
+/**
+ * Loads one or multiple .proto or preprocessed .json files into this root namespace and calls the callback.
+ * @param {string|string[]} filename Names of one or multiple files to load
+ * @param {IParseOptions} options Parse options
+ * @param {LoadCallback} callback Callback function
+ * @returns {undefined}
+ */
+Root.prototype.load = function load(filename, options, callback) {
+    if (typeof options === "function") {
+        callback = options;
+        options = undefined;
+    }
+    var self = this;
+    if (!callback) {
+        return util.asPromise(load, self, filename, options);
+    }
+
+    var sync = callback === SYNC; // undocumented
+
+    // Finishes loading by calling the callback (exactly once)
+    function finish(err, root) {
+        /* istanbul ignore if */
+        if (!callback) {
+            return;
+        }
+        if (sync) {
+            throw err;
+        }
+        if (root) {
+            root.resolveAll();
+        }
+        var cb = callback;
+        callback = null;
+        cb(err, root);
+    }
+
+    // Bundled definition existence checking
+    function getBundledFileName(filename) {
+        var idx = filename.lastIndexOf("google/protobuf/");
+        if (idx > -1) {
+            var altname = filename.substring(idx);
+            if (altname in common) return altname;
+        }
+        return null;
+    }
+
+    // Processes a single file
+    function process(filename, source) {
+        try {
+            if (util.isString(source) && source.charAt(0) === "{")
+                source = JSON.parse(source);
+            if (!util.isString(source))
+                self.setOptions(source.options).addJSON(source.nested);
+            else {
+                parse.filename = filename;
+                var parsed = parse(source, self, options),
+                    resolved,
+                    i = 0;
+                if (parsed.imports)
+                    for (; i < parsed.imports.length; ++i)
+                        if (resolved = getBundledFileName(parsed.imports[i]) || self.resolvePath(filename, parsed.imports[i]))
+                            fetch(resolved);
+                if (parsed.weakImports)
+                    for (i = 0; i < parsed.weakImports.length; ++i)
+                        if (resolved = getBundledFileName(parsed.weakImports[i]) || self.resolvePath(filename, parsed.weakImports[i]))
+                            fetch(resolved, true);
+            }
+        } catch (err) {
+            finish(err);
+        }
+        if (!sync && !queued) {
+            finish(null, self); // only once anyway
+        }
+    }
+
+    // Fetches a single file
+    function fetch(filename, weak) {
+        filename = getBundledFileName(filename) || filename;
+
+        // Skip if already loaded / attempted
+        if (self.files.indexOf(filename) > -1) {
+            return;
+        }
+        self.files.push(filename);
+
+        // Shortcut bundled definitions
+        if (filename in common) {
+            if (sync) {
+                process(filename, common[filename]);
+            } else {
+                ++queued;
+                setTimeout(function() {
+                    --queued;
+                    process(filename, common[filename]);
+                });
+            }
+            return;
+        }
+
+        // Otherwise fetch from disk or network
+        if (sync) {
+            var source;
+            try {
+                source = util.fs.readFileSync(filename).toString("utf8");
+            } catch (err) {
+                if (!weak)
+                    finish(err);
+                return;
+            }
+            process(filename, source);
+        } else {
+            ++queued;
+            self.fetch(filename, function(err, source) {
+                --queued;
+                /* istanbul ignore if */
+                if (!callback) {
+                    return; // terminated meanwhile
+                }
+                if (err) {
+                    /* istanbul ignore else */
+                    if (!weak)
+                        finish(err);
+                    else if (!queued) // can't be covered reliably
+                        finish(null, self);
+                    return;
+                }
+                process(filename, source);
+            });
+        }
+    }
+    var queued = 0;
+
+    // Assembling the root namespace doesn't require working type
+    // references anymore, so we can load everything in parallel
+    if (util.isString(filename)) {
+        filename = [ filename ];
+    }
+    for (var i = 0, resolved; i < filename.length; ++i)
+        if (resolved = self.resolvePath("", filename[i]))
+            fetch(resolved);
+    if (sync) {
+        self.resolveAll();
+        return self;
+    }
+    if (!queued) {
+        finish(null, self);
+    }
+
+    return self;
+};
+// function load(filename:string, options:IParseOptions, callback:LoadCallback):undefined
+
+/**
+ * Loads one or multiple .proto or preprocessed .json files into this root namespace and calls the callback.
+ * @function Root#load
+ * @param {string|string[]} filename Names of one or multiple files to load
+ * @param {LoadCallback} callback Callback function
+ * @returns {undefined}
+ * @variation 2
+ */
+// function load(filename:string, callback:LoadCallback):undefined
+
+/**
+ * Loads one or multiple .proto or preprocessed .json files into this root namespace and returns a promise.
+ * @function Root#load
+ * @param {string|string[]} filename Names of one or multiple files to load
+ * @param {IParseOptions} [options] Parse options. Defaults to {@link parse.defaults} when omitted.
+ * @returns {Promise<Root>} Promise
+ * @variation 3
+ */
+// function load(filename:string, [options:IParseOptions]):Promise<Root>
+
+/**
+ * Synchronously loads one or multiple .proto or preprocessed .json files into this root namespace (node only).
+ * @function Root#loadSync
+ * @param {string|string[]} filename Names of one or multiple files to load
+ * @param {IParseOptions} [options] Parse options. Defaults to {@link parse.defaults} when omitted.
+ * @returns {Root} Root namespace
+ * @throws {Error} If synchronous fetching is not supported (i.e. in browsers) or if a file's syntax is invalid
+ */
+Root.prototype.loadSync = function loadSync(filename, options) {
+    if (!util.isNode)
+        throw Error("not supported");
+    return this.load(filename, options, SYNC);
+};
+
+/**
+ * @override
+ */
+Root.prototype.resolveAll = function resolveAll() {
+    if (!this._needsRecursiveResolve) return this;
+
+    if (this.deferred.length)
+        throw Error("unresolvable extensions: " + this.deferred.map(function(field) {
+            return "'extend " + field.extend + "' in " + field.parent.fullName;
+        }).join(", "));
+    return Namespace.prototype.resolveAll.call(this);
+};
+
+// only uppercased (and thus conflict-free) children are exposed, see below
+var exposeRe = /^[A-Z]/;
+
+/**
+ * Handles a deferred declaring extension field by creating a sister field to represent it within its extended type.
+ * @param {Root} root Root instance
+ * @param {Field} field Declaring extension field witin the declaring type
+ * @returns {boolean} `true` if successfully added to the extended type, `false` otherwise
+ * @inner
+ * @ignore
+ */
+function tryHandleExtension(root, field) {
+    var extendedType = field.parent.lookup(field.extend);
+    if (extendedType) {
+        var sisterField = new Field(field.fullName, field.id, field.type, field.rule, undefined, field.options);
+        //do not allow to extend same field twice to prevent the error
+        if (extendedType.get(sisterField.name)) {
+            return true;
+        }
+        sisterField.declaringField = field;
+        field.extensionField = sisterField;
+        extendedType.add(sisterField);
+        return true;
+    }
+    return false;
+}
+
+/**
+ * Called when any object is added to this root or its sub-namespaces.
+ * @param {ReflectionObject} object Object added
+ * @returns {undefined}
+ * @private
+ */
+Root.prototype._handleAdd = function _handleAdd(object) {
+    if (object instanceof Field) {
+
+        if (/* an extension field (implies not part of a oneof) */ object.extend !== undefined && /* not already handled */ !object.extensionField)
+            if (!tryHandleExtension(this, object))
+                this.deferred.push(object);
+
+    } else if (object instanceof Enum) {
+
+        if (exposeRe.test(object.name))
+            object.parent[object.name] = object.values; // expose enum values as property of its parent
+
+    } else if (!(object instanceof OneOf)) /* everything else is a namespace */ {
+
+        if (object instanceof Type) // Try to handle any deferred extensions
+            for (var i = 0; i < this.deferred.length;)
+                if (tryHandleExtension(this, this.deferred[i]))
+                    this.deferred.splice(i, 1);
+                else
+                    ++i;
+        for (var j = 0; j < /* initializes */ object.nestedArray.length; ++j) // recurse into the namespace
+            this._handleAdd(object._nestedArray[j]);
+        if (exposeRe.test(object.name))
+            object.parent[object.name] = object; // expose namespace as property of its parent
+    }
+
+    if (object instanceof Type || object instanceof Enum || object instanceof Field) {
+        // Only store types and enums for quick lookup during resolve.
+        this._fullyQualifiedObjects[object.fullName] = object;
+    }
+
+    // The above also adds uppercased (and thus conflict-free) nested types, services and enums as
+    // properties of namespaces just like static code does. This allows using a .d.ts generated for
+    // a static module with reflection-based solutions where the condition is met.
+};
+
+/**
+ * Called when any object is removed from this root or its sub-namespaces.
+ * @param {ReflectionObject} object Object removed
+ * @returns {undefined}
+ * @private
+ */
+Root.prototype._handleRemove = function _handleRemove(object) {
+    if (object instanceof Field) {
+
+        if (/* an extension field */ object.extend !== undefined) {
+            if (/* already handled */ object.extensionField) { // remove its sister field
+                object.extensionField.parent.remove(object.extensionField);
+                object.extensionField = null;
+            } else { // cancel the extension
+                var index = this.deferred.indexOf(object);
+                /* istanbul ignore else */
+                if (index > -1)
+                    this.deferred.splice(index, 1);
+            }
+        }
+
+    } else if (object instanceof Enum) {
+
+        if (exposeRe.test(object.name))
+            delete object.parent[object.name]; // unexpose enum values
+
+    } else if (object instanceof Namespace) {
+
+        for (var i = 0; i < /* initializes */ object.nestedArray.length; ++i) // recurse into the namespace
+            this._handleRemove(object._nestedArray[i]);
+
+        if (exposeRe.test(object.name))
+            delete object.parent[object.name]; // unexpose namespaces
+
+    }
+
+    delete this._fullyQualifiedObjects[object.fullName];
+};
+
+// Sets up cyclic dependencies (called in index-light)
+Root._configure = function(Type_, parse_, common_) {
+    Type   = Type_;
+    parse  = parse_;
+    common = common_;
+};