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/// <reference path="harness.ts" />

/// <reference path="..\compiler\commandLineParser.ts"/>

namespace Utils {

export class VirtualFileSystemEntry {

fileSystem: VirtualFileSystem;

name: string;

constructor(fileSystem: VirtualFileSystem, name: string) {

this.fileSystem = fileSystem;

this.name = name;

}

isDirectory(): this is VirtualDirectory { return false; }

isFile(): this is VirtualFile { return false; }

isFileSystem(): this is VirtualFileSystem { return false; }

}

export class VirtualFile extends VirtualFileSystemEntry {

content?: Harness.LanguageService.ScriptInfo;

isFile() { return true; }

}

export abstract class VirtualFileSystemContainer extends VirtualFileSystemEntry {

abstract getFileSystemEntries(): VirtualFileSystemEntry[];

getFileSystemEntry(name: string): VirtualFileSystemEntry {

for (const entry of this.getFileSystemEntries()) {

if (this.fileSystem.sameName(entry.name, name)) {

return entry;

}

}

return undefined;

}

getDirectories(): VirtualDirectory[] {

return <VirtualDirectory[]>ts.filter(this.getFileSystemEntries(), entry => entry.isDirectory());

}

getFiles(): VirtualFile[] {

return <VirtualFile[]>ts.filter(this.getFileSystemEntries(), entry => entry.isFile());

}

getDirectory(name: string): VirtualDirectory {

const entry = this.getFileSystemEntry(name);

return entry.isDirectory() ? <VirtualDirectory>entry : undefined;

}

getFile(name: string): VirtualFile {

const entry = this.getFileSystemEntry(name);

return entry.isFile() ? <VirtualFile>entry : undefined;

}

}

export class VirtualDirectory extends VirtualFileSystemContainer {

private entries: VirtualFileSystemEntry[] = [];

isDirectory() { return true; }

getFileSystemEntries() { return this.entries.slice(); }

addDirectory(name: string): VirtualDirectory {

const entry = this.getFileSystemEntry(name);

if (entry === undefined) {

const directory = new VirtualDirectory(this.fileSystem, name);

this.entries.push(directory);

return directory;

}

else if (entry.isDirectory()) {

return <VirtualDirectory>entry;

}

else {

return undefined;

}

}

addFile(name: string, content?: Harness.LanguageService.ScriptInfo): VirtualFile {

const entry = this.getFileSystemEntry(name);

if (entry === undefined) {

const file = new VirtualFile(this.fileSystem, name);

file.content = content;

this.entries.push(file);

return file;

}

else if (entry.isFile()) {

entry.content = content;

return entry;

}

else {

return undefined;

}

}

}

export class VirtualFileSystem extends VirtualFileSystemContainer {

private root: VirtualDirectory;

currentDirectory: string;

useCaseSensitiveFileNames: boolean;

constructor(currentDirectory: string, useCaseSensitiveFileNames: boolean) {

super(undefined, "");

this.fileSystem = this;

this.root = new VirtualDirectory(this, "");

this.currentDirectory = currentDirectory;

this.useCaseSensitiveFileNames = useCaseSensitiveFileNames;

}

isFileSystem() { return true; }

getFileSystemEntries() { return this.root.getFileSystemEntries(); }

addDirectory(path: string) {

path = ts.normalizePath(path);

const components = ts.getNormalizedPathComponents(path, this.currentDirectory);

let directory: VirtualDirectory = this.root;

for (const component of components) {

directory = directory.addDirectory(component);

if (directory === undefined) {

break;

}

}

return directory;

}

addFile(path: string, content?: Harness.LanguageService.ScriptInfo) {

const absolutePath = ts.normalizePath(ts.getNormalizedAbsolutePath(path, this.currentDirectory));

const fileName = ts.getBaseFileName(path);

const directoryPath = ts.getDirectoryPath(absolutePath);

const directory = this.addDirectory(directoryPath);

return directory ? directory.addFile(fileName, content) : undefined;

}

fileExists(path: string) {

const entry = this.traversePath(path);

return entry !== undefined && entry.isFile();

}

sameName(a: string, b: string) {

return this.useCaseSensitiveFileNames ? a === b : a.toLowerCase() === b.toLowerCase();

}

traversePath(path: string) {

path = ts.normalizePath(path);

let directory: VirtualDirectory = this.root;

for (const component of ts.getNormalizedPathComponents(path, this.currentDirectory)) {

const entry = directory.getFileSystemEntry(component);

if (entry === undefined) {

return undefined;

}

else if (entry.isDirectory()) {

directory = <VirtualDirectory>entry;

}

else {

return entry;

}

}

return directory;

}

/**

* Reads the directory at the given path and retrieves a list of file names and a list

* of directory names within it. Suitable for use with ts.matchFiles()

* @param path The path to the directory to be read

*/

getAccessibleFileSystemEntries(path: string) {

const entry = this.traversePath(path);

if (entry && entry.isDirectory()) {

const directory = <VirtualDirectory>entry;

return {

files: ts.map(directory.getFiles(), f => f.name),

directories: ts.map(directory.getDirectories(), d => d.name)

};

}

return { files: [], directories: [] };

}

getAllFileEntries() {

const fileEntries: VirtualFile[] = [];

getFilesRecursive(this.root, fileEntries);

return fileEntries;

function getFilesRecursive(dir: VirtualDirectory, result: VirtualFile[]) {

const files = dir.getFiles();

const dirs = dir.getDirectories();

for (const file of files) {

result.push(file);

}

for (const subDir of dirs) {

getFilesRecursive(subDir, result);

}

}

}

}

export class MockParseConfigHost extends VirtualFileSystem implements ts.ParseConfigHost {

constructor(currentDirectory: string, ignoreCase: boolean, files: ts.MapLike<string> | string[]) {

super(currentDirectory, ignoreCase);

const fileNames = (files instanceof Array) ? files : ts.getOwnKeys(files);

for (const file of fileNames) {

this.addFile(file, new Harness.LanguageService.ScriptInfo(file, (files as ts.MapLike<string>)[file], /*isRootFile*/false));

}

}

readFile(path: string): string {

const value = this.traversePath(path);

if (value && value.isFile()) {

return value.content.content;

}

}

readDirectory(path: string, extensions: string[], excludes: string[], includes: string[]) {

return ts.matchFiles(path, extensions, excludes, includes, this.useCaseSensitiveFileNames, this.currentDirectory, (path: string) => this.getAccessibleFileSystemEntries(path));

}

}

}