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util.ts
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import {
IS_DART,
StringWrapper,
isBlank,
isPresent,
isString,
isArray
} from 'angular2/src/facade/lang';
var CAMEL_CASE_REGEXP = /([A-Z])/g;
var DASH_CASE_REGEXP = /-([a-z])/g;
var SINGLE_QUOTE_ESCAPE_STRING_RE = /'|\\|\n|\r|\$/g;
var DOUBLE_QUOTE_ESCAPE_STRING_RE = /"|\\|\n|\r|\$/g;
export var MODULE_SUFFIX = IS_DART ? '.dart' : '.js';
export var CONST_VAR = IS_DART ? 'const' : 'var';
export function camelCaseToDashCase(input: string): string {
return StringWrapper.replaceAllMapped(input, CAMEL_CASE_REGEXP,
(m) => { return '-' + m[1].toLowerCase(); });
}
export function dashCaseToCamelCase(input: string): string {
return StringWrapper.replaceAllMapped(input, DASH_CASE_REGEXP,
(m) => { return m[1].toUpperCase(); });
}
export function escapeSingleQuoteString(input: string): string {
if (isBlank(input)) {
return null;
}
return `'${escapeString(input, SINGLE_QUOTE_ESCAPE_STRING_RE)}'`;
}
export function escapeDoubleQuoteString(input: string): string {
if (isBlank(input)) {
return null;
}
return `"${escapeString(input, DOUBLE_QUOTE_ESCAPE_STRING_RE)}"`;
}
function escapeString(input: string, re: RegExp): string {
return StringWrapper.replaceAllMapped(input, re, (match) => {
if (match[0] == '$') {
return IS_DART ? '\\$' : '$';
} else if (match[0] == '\n') {
return '\\n';
} else if (match[0] == '\r') {
return '\\r';
} else {
return `\\${match[0]}`;
}
});
}
export function codeGenExportVariable(name: string): string {
if (IS_DART) {
return `const ${name} = `;
} else {
return `var ${name} = exports['${name}'] = `;
}
}
export function codeGenConstConstructorCall(name: string): string {
if (IS_DART) {
return `const ${name}`;
} else {
return `new ${name}`;
}
}
export function codeGenValueFn(params: string[], value: string, fnName: string = ''): string {
if (IS_DART) {
return `${codeGenFnHeader(params, fnName)} => ${value}`;
} else {
return `${codeGenFnHeader(params, fnName)} { return ${value}; }`;
}
}
export function codeGenFnHeader(params: string[], fnName: string = ''): string {
if (IS_DART) {
return `${fnName}(${params.join(',')})`;
} else {
return `function ${fnName}(${params.join(',')})`;
}
}
export function codeGenToString(expr: string): string {
if (IS_DART) {
return `'\${${expr}}'`;
} else {
// JS automatically converts to string...
return expr;
}
}
export function splitAtColon(input: string, defaultValues: string[]): string[] {
var parts = StringWrapper.split(input.trim(), /\s*:\s*/g);
if (parts.length > 1) {
return parts;
} else {
return defaultValues;
}
}
export class Statement {
constructor(public statement: string) {}
}
export class Expression {
constructor(public expression: string, public isArray = false) {}
}
export function escapeValue(value: any): string {
if (value instanceof Expression) {
return value.expression;
} else if (isString(value)) {
return escapeSingleQuoteString(value);
} else if (isBlank(value)) {
return 'null';
} else {
return `${value}`;
}
}
export function codeGenArray(data: any[]): string {
return `[${data.map(escapeValue).join(',')}]`;
}
export function codeGenFlatArray(values: any[]): string {
var result = '([';
var isFirstArrayEntry = true;
var concatFn = IS_DART ? '.addAll' : 'concat';
for (var i = 0; i < values.length; i++) {
var value = values[i];
if (value instanceof Expression && (<Expression>value).isArray) {
result += `]).${concatFn}(${value.expression}).${concatFn}([`;
isFirstArrayEntry = true;
} else {
if (!isFirstArrayEntry) {
result += ',';
}
isFirstArrayEntry = false;
result += escapeValue(value);
}
}
result += '])';
return result;
}
export function codeGenStringMap(keyValueArray: any[][]): string {
return `{${keyValueArray.map(codeGenKeyValue).join(',')}}`;
}
function codeGenKeyValue(keyValue: any[]): string {
return `${escapeValue(keyValue[0])}:${escapeValue(keyValue[1])}`;
}
export function addAll(source: any[], target: any[]) {
for (var i = 0; i < source.length; i++) {
target.push(source[i]);
}
}
export function flattenArray(source: any[], target: any[]): any[] {
if (isPresent(source)) {
for (var i = 0; i < source.length; i++) {
var item = source[i];
if (isArray(item)) {
flattenArray(item, target);
} else {
target.push(item);
}
}
}
return target;
}