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/*

* Copyright 2019 MarkLogic Corporation

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

'use strict';

const fs = require('fs');

const path = require('path');

const {Transform} = require('stream');

const ProxyGenerator = require('../lib/proxy-generator.js');

const Vinyl = require('../lib/optional.js').library('vinyl');

let testData = null;

try {

const testDataFile = path.resolve(path.resolve('test-basic-proxy'), 'testdef.json');

testData = JSON.parse(fs.readFileSync(testDataFile, 'utf8'));

} catch (err) {

console.error(`could not open ${testDataFile}`);

throw err;

}

function transformDirectoryToTestSource() {

return new Transform({

allowHalfOpen: false,

writableObjectMode: true,

readableObjectMode: true,

transform(directory, encoding, callback) {

const self = this;

if (!Vinyl.isVinyl(directory) || !directory.isDirectory() || directory.path === void 0 || !(directory.path.length > 0)) {

console.trace('not Vinyl directory: '+directory);

callback();

return;

}

ProxyGenerator.readDeclarations(directory.path)

.then(result => {

if (result === void 0 || result === null ||

!Array.isArray(result.functionDeclarations) || result.functionDeclarations.length === 0

) {

console.trace('no declarations: ' +directory.path);

callback();

return;

}

const serviceDeclaration = result.serviceDeclaration;

const functionDeclarations = result.functionDeclarations;

const cwd = directory.cwd;

const outputBase = path.resolve(cwd, 'lib');

const moduleName = directory.basename;

const proxySrc = ProxyGenerator.generateSource(moduleName, serviceDeclaration, functionDeclarations);

const outputFile = {

cwd: cwd,

base: outputBase,

path: path.resolve(outputBase, moduleName+'.js'),

contents: Buffer.from(proxySrc, 'utf-8')

};

const testSrc = generateTest(moduleName, serviceDeclaration, functionDeclarations);

const testFile = {

cwd: cwd,

base: outputBase,

path: path.resolve(outputBase, moduleName+'Test.js'),

contents: Buffer.from(testSrc, 'utf-8')

};

self.push(new Vinyl(outputFile));

self.push(new Vinyl(testFile));

callback();

})

.catch(err => callback(err));

}

});

}

function generateTest(moduleName, servicedef, endpoints) {

const className = moduleName.substring(0, 1).toUpperCase() + moduleName.substring(1);

const endpointCalls = endpoints.map(endpointdef => {

const functiondef = endpointdef.declaration;

const functionName = functiondef.functionName;

const params = (!Array.isArray(functiondef.params)) ? null :

functiondef.params.filter(param => param.datatype !== 'session');

const args = (!Array.isArray(params) || params.length === 0) ? '' :

params.map(param => {

const datatype = param.datatype;

const multiple = (param.multiple === true);

return getValue('input', datatype, multiple);

}).join(', ');

const returndef = functiondef.return;

const expectation = (returndef === void 0 || returndef === null || functionName.endsWith('ReturnNull')) ?

'expect(output).to.be.undefined;' :

`expect(output).to.eql(${getValue('output', returndef.datatype, (returndef.multiple=== true))})`;

return `

it('${functionName} endpoint', function(done) {

service.${functionName}(${args})

.then(output => {

${expectation}

done();

})

.catch(err => {

expect.fail(err.toString());

done();

});

});`;

}).join('');

return `'use strict';

const expect = require('chai').expect;

const testutil = require('../testutil');

const ${className} = require("./${moduleName}.js");

describe('${moduleName} service', function() {

const service = ${className}.on(testutil.makeClient());

${endpointCalls}

});

`;

}

function getValue(mode, datatype, multiple) {

const values = testData[datatype];

switch(datatype) {

case 'binaryDocument':

if (multiple)

return `[Buffer.from('${values[0]}', 'base64'), Buffer.from('${values[1]}', 'base64')]`;

return `Buffer.from('${values[0]}', 'base64')`;

case 'dateTime':

switch(mode) {

case 'input':

if (multiple)

return `[new Date('${values[0]}'), new Date('${values[1]}')]`;

return `new Date('${values[0]}')`;

case 'output':

if (multiple)

return `['${values[0]}', '${values[1]}']`;

return `'${values[0]}'`;

default:

throw new Error(`unsupported mode: ${mode}`);

}

case 'array':

case 'boolean':

case 'float':

case 'int':

case 'jsonDocument':

case 'object':

case 'unsignedInt':

if (multiple)

return `[${values[0]}, ${values[1]}]`;

return values[0];

case 'date':

case 'dayTimeDuration':

case 'decimal':

case 'double':

case 'long':

case 'string':

case 'textDocument':

case 'time':

case 'unsignedLong':

if (multiple)

return `['${values[0]}', '${values[1]}']`;

return `'${values[0]}'`;

case 'xmlDocument':

if (multiple)

return `['${values[0]}', '${values[1]}']`;

return `'${values[0]}\\n'`;

default:

throw new Error(`unsupported datatype: ${datatype}`);

}

}

module.exports = {

generate: transformDirectoryToTestSource

};