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AnalysisService.ts
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AnalysisService.ts
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import {CodeRunner, CodeRunnerError, UnexpectedTimeoutError} from './runner';
import {
AlgorithmSpeed,
AnalysisResult,
AnalysisTestSet,
BigO,
Code,
Language,
RunnableCode,
RunTime
} from './structures';
import {ArgumentGeneratingFunction, CodeTransformerFunction, TestSetCreator} from './creator';
import {Calculator, GenericCalculator, TIMEOUT_THRESHOLD_MS} from './calculator';
export type AnalysisServiceConfig = {
optimalComplexities?: Map<string, BigO>,
calculators?: Map<Language, Calculator>,
repeatedSamples?: Map<Language, number[]>,
defaultCalculator?: Calculator,
}
class AnalysisService {
private optimalComplexities: Map<string, BigO>;
private calculators: Map<Language, Calculator>;
private repeatedSamples: Map<Language, number[]>;
private defaultCalculator: Calculator;
private codeRunner: CodeRunner;
private testSetCreator: TestSetCreator;
constructor(codeRunner: CodeRunner, config?: AnalysisServiceConfig) {
this.codeRunner = codeRunner;
this.optimalComplexities = new Map<string, BigO>();
this.calculators = new Map<Language, Calculator>();
this.repeatedSamples = new Map<Language, number[]>();
this.defaultCalculator = new GenericCalculator();
if (config) {
if (config.optimalComplexities) {
this.optimalComplexities = config.optimalComplexities;
}
if (config.calculators) {
this.calculators = config.calculators;
}
if (config.repeatedSamples) {
this.repeatedSamples = config.repeatedSamples;
}
if (config.defaultCalculator) {
this.defaultCalculator = config.defaultCalculator;
}
}
this.testSetCreator = new TestSetCreator();
}
public analyze(code: Code, runnerContext: { [key: string]: string } = {}): Promise<AnalysisResult> {
const testSet: AnalysisTestSet = this.testSetCreator.create(code);
const testResultsObj: { r: RunTime[] } = {r: []};
const calculator: Calculator = this.calculatorForLanguage(code.language);
return this.recursiveAnalyze(calculator, testSet, testResultsObj, 0, runnerContext);
}
private recursiveAnalyze(
calculator: Calculator,
testSet: AnalysisTestSet,
testResultsObj: { r: RunTime[] },
i = 0,
runnerContext: { [key: string]: string } = {}
): Promise<AnalysisResult> {
return this.runSample(testSet.code, testSet.samples[i], testResultsObj, runnerContext)
.then((testResults: RunTime[]) => {
const bigO: BigO = calculator.calculate(testResults, testSet.code.expectedSpeed);
if (bigO !== BigO.UNKNOWN) {
return Promise.resolve({bigO, testResults});
}
if (testResults[testResults.length-1].result >= TIMEOUT_THRESHOLD_MS) {
const err = new UnexpectedTimeoutError('Calculator could not handle runner timeout.');
err.testResults = testResults;
err.code = testSet.code;
return Promise.reject(err);
}
if (i === testSet.samples.length - 1) {
return Promise.resolve({
bigO: this.optimalComplexity(testSet.code.testedFunctionName),
testResults
});
}
return this.recursiveAnalyze(calculator, testSet, testResultsObj, ++i, runnerContext);
});
}
private runSample(
code: Code,
sample: RunnableCode,
testResultsObj: { r: RunTime[] },
runnerContext: { [key: string]: string } = {}
): Promise<RunTime[]> {
let runs: number = this.runCountForSample(code.language, sample.n);
const promises: Promise<RunTime>[] = [];
while (runs > 0) {
runs--;
const durationRunner: Promise<RunTime> = this.codeRunner.checkCodeExecDuration(code.language, sample.code, runnerContext)
.then((duration: number) => {
return Promise.resolve({
result: duration,
n: sample.n
});
});
promises.push(durationRunner);
}
return Promise.all(promises)
.then((runnerResults: RunTime[]) => {
testResultsObj.r = testResultsObj.r.concat(runnerResults);
return testResultsObj.r;
}).catch(err => {
if (err instanceof CodeRunnerError) {
err.failedSample = sample.n;
err.testResults = testResultsObj.r;
err.code = code;
}
return Promise.reject(err);
});
}
addTestSetCreatorDefaultLanguageSet(language: Language, sampleSizes: number[]): void
{
this.testSetCreator.addDefaultLanguageSet(language, sampleSizes);
}
addTestSetCreatorSpeedLanguageSet(language: Language, speed: AlgorithmSpeed, sampleSizes: number[]): void
{
this.testSetCreator.addSpeedLanguageSet(language, speed, sampleSizes);
}
useBuiltInGenerator(testedFunctionName: string, builtInGeneratorName: string): void
{
this.testSetCreator.useBuiltInGenerator(testedFunctionName, builtInGeneratorName);
}
addCustomGenerator(testedFunctionName: string, func: ArgumentGeneratingFunction): void
{
this.testSetCreator.addCustomGenerator(testedFunctionName, func);
}
addLanguageCodeTransformer(language: Language, transformer: CodeTransformerFunction): void
{
this.testSetCreator.addLanguageCodeTransformer(language, transformer);
}
addLanguageReplacePattern(language: Language, pattern: string|RegExp): void
{
this.testSetCreator.addLanguageReplacePattern(language, pattern);
}
private runCountForSample(language: Language, sampleSize: number): number {
if (this.repeatedSamples.has(language)) {
const samples: number[] = this.repeatedSamples.get(language);
if (samples.indexOf(sampleSize) !== -1) {
return 3;
}
}
return 1;
}
private optimalComplexity(type: string): BigO
{
if (this.optimalComplexities.has(type)) {
return this.optimalComplexities.get(type);
}
return BigO.LINEAR;
}
private calculatorForLanguage(language: Language): Calculator
{
if (this.calculators.has(language)) {
return this.calculators.get(language);
}
return this.defaultCalculator;
}
}
export {AnalysisService};