plantuml-pipe
Version:
Generate multiple PlantUML diagrams with one JAVA process
162 lines (161 loc) • 7.84 kB
JavaScript
;
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Object.defineProperty(exports, "__esModule", { value: true });
exports.PlantUmlPipe = void 0;
var binary_split_1 = __importDefault(require("binary-split"));
var child_process_1 = require("child_process");
var fs = __importStar(require("fs"));
var os_1 = require("os");
var split2_1 = __importDefault(require("split2"));
var drop_empty_chunks_stream_1 = require("./drop_empty_chunks_stream");
var plantuml_pipe_options_1 = require("./plantuml_pipe_options");
/**
* Class that wraps a PlantUML diagram generator running in pipe mode.
*/
var PlantUmlPipe = /** @class */ (function () {
/**
* Creates a new PlantUML pipe.
* @param userOptions Possible user defined options for the PlantUML generating pipe.
*/
function PlantUmlPipe(userOptions) {
var _this = this;
if (userOptions === void 0) { userOptions = {}; }
/**
* Collection of promise resolver functions used for the "process" method that returns a promise.
*/
this.resolvers = new Array();
/**
* Resolves the currently first promise in the queue by calling its corresponding resolve function.
* @param imageData The gnerated image data that is passed to the resolve function of the promise.
*/
this.resolvePromise = function (imageData) {
var resolver = _this.resolvers.shift();
if (resolver) {
resolver(imageData);
}
};
var options = (0, plantuml_pipe_options_1.addDefaultsToOptions)(userOptions);
if (!fs.existsSync(options.jarPath)) {
throw new Error("plantuml JAR file not found: " + options.jarPath);
}
var args = (0, plantuml_pipe_options_1.createArgsFromOptions)(options);
this.javaProcess = (0, child_process_1.spawn)("java", args);
this.inputStream = this.javaProcess.stdin;
if (options.split) {
var splitter = options.outputFormat === "png" ? (0, binary_split_1.default)(options.delimiter + os_1.EOL) : (0, split2_1.default)(options.delimiter + os_1.EOL);
// PlantUML pipe mode also adds the delimiter to the end of the last created image.
// This results in the last buffer being empty. DropEmptyChunksStream drops that buffer.
this.outputStream = this.javaProcess.stdout.pipe(splitter).pipe(new drop_empty_chunks_stream_1.DropEmptyChunksStream());
}
else {
this.outputStream = this.javaProcess.stdout;
}
}
Object.defineProperty(PlantUmlPipe.prototype, "in", {
/**
* @returns The input stream into which to write the PlantUML code of the diagrams.
*/
get: function () {
return this.inputStream;
},
enumerable: false,
configurable: true
});
Object.defineProperty(PlantUmlPipe.prototype, "out", {
/**
* @returns The output stream from which to read the generated PlantUML diagram images.
*/
get: function () {
return this.outputStream;
},
enumerable: false,
configurable: true
});
/**
* Closes the input stream of the PlantUML diagram generator.
*/
PlantUmlPipe.prototype.close = function () {
this.inputStream.end();
};
PlantUmlPipe.prototype.process = function (plantUml) {
return __awaiter(this, void 0, void 0, function () {
var resolver, promise;
return __generator(this, function (_a) {
promise = new Promise(function (resolve) {
resolver = resolve;
});
if (resolver) {
this.resolvers.push(resolver);
}
if (!this.outputStream.listeners("data").includes(this.resolvePromise)) {
this.outputStream.on("data", this.resolvePromise);
}
this.inputStream.write(plantUml.endsWith("\n") ? plantUml : plantUml + "\n");
return [2 /*return*/, promise];
});
});
};
return PlantUmlPipe;
}());
exports.PlantUmlPipe = PlantUmlPipe;