@kephas/core
Version:
Provides a common infrastructure for all the other Kephas Framework components: ambient services, dynamic reflection, composition, application management, and others.
100 lines • 12.5 kB
JavaScript
/**
* Arguments used in command line execution.
*
* @export
* @class Args
* @implements {Expando}
*/
export class Args {
/**
* Creates an instance of Args.
* @param {(string | string[] | {})} [args] The arguments.
* @memberof Args
*/
constructor(args) {
if (typeof args === 'string') {
this._fillArgsFromString(args, this);
}
else if (Array.isArray(args)) {
this._fillArgsFromStringArray(args, this);
}
else if (typeof args === 'object') {
this._fillArgsFromObject(args, this);
}
}
_fillArgsFromObject(source, target) {
for (let key in source) {
target[key] = source[key];
}
return target;
}
_fillArgsFromString(source, target) {
var args = source.split(' ').filter(i => i !== '');
return this._fillArgsFromStringArray(args, target);
}
_fillArgsFromStringArray(source, target) {
let key = '';
let value = null;
let expectedValue = false;
for (let currentArg of source) {
var keyStartIndex = 0;
if (currentArg.startsWith("--")) {
keyStartIndex = 2;
}
else if (currentArg.startsWith("-")) {
keyStartIndex = 1;
}
else if (currentArg.startsWith("/")) {
// "/SomeSwitch" is equivalent to "--SomeSwitch"
keyStartIndex = 1;
}
// if we received a new argument, but we expected a value, add the previous key with the value "true"
if (expectedValue) {
expectedValue = false;
if (keyStartIndex > 0) {
// set the previous key to true and continue with processing the current arg
target[key] = true;
}
else {
target[key] = Args._unescape(currentArg);
continue;
}
}
// currentArg starts a new argument
var separator = currentArg.indexOf('=');
if (separator >= 0) {
// currentArg specifies a key with value
key = Args._unescape(currentArg.substr(keyStartIndex, separator - keyStartIndex));
value = Args._unescape(currentArg.substr(separator + 1));
}
else {
// currentArg specifies only a key
// If there is no prefix in current argument, consider it as a key with value "true"
if (keyStartIndex == 0) {
key = Args._unescape(currentArg);
value = true;
}
else {
key = Args._unescape(currentArg.substr(keyStartIndex));
expectedValue = true;
}
}
// Override value when key is duplicated. So we always have the last argument win.
if (!expectedValue) {
target[key] = value;
}
}
if (expectedValue) {
target[key] = true;
}
return target;
}
static _unescape(value) {
if (value.startsWith("\"") && value.endsWith("\"")) {
value = value.substr(1, value.length - 2);
return value.replace("\\\"", "\"");
}
return value;
}
}
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{ Expando } from \"../expando\";\r\n\r\n/**\r\n * Arguments used in command line execution.\r\n *\r\n * @export\r\n * @class Args\r\n * @implements {Expando}\r\n */\r\nexport class Args implements Expando {\r\n    /**\r\n     * Creates an instance of Args.\r\n     * @param {(string | string[] | {})} [args] The arguments.\r\n     * @memberof Args\r\n     */\r\n    constructor(args?: string | string[] | {}) {\r\n        if (typeof args === 'string') {\r\n            this._fillArgsFromString(args, this);\r\n        }\r\n        else if (Array.isArray(args)) {\r\n            this._fillArgsFromStringArray(args, this);\r\n        }\r\n        else if (typeof args === 'object') {\r\n            this._fillArgsFromObject(args, this);\r\n        }\r\n    }\r\n\r\n    private _fillArgsFromObject(source: {}, target: Expando): Expando {\r\n        for(let key in source) {\r\n            target[key] = (source as Expando)[key];\r\n        }\r\n        return target;\r\n    }\r\n\r\n    private _fillArgsFromString(source: string, target: Expando): Expando {\r\n        var args = source.split(' ').filter(i => i !== '');\r\n        return this._fillArgsFromStringArray(args, target);\r\n    }\r\n\r\n    private _fillArgsFromStringArray(source: string[], target: Expando): Expando {\r\n        let key = '';\r\n        let value: any = null;\r\n        let expectedValue = false;\r\n\r\n        for (let currentArg of source) {\r\n            var keyStartIndex = 0;\r\n\r\n            if (currentArg.startsWith(\"--\")) {\r\n                keyStartIndex = 2;\r\n            }\r\n            else if (currentArg.startsWith(\"-\")) {\r\n                keyStartIndex = 1;\r\n            }\r\n            else if (currentArg.startsWith(\"/\")) {\r\n                // \"/SomeSwitch\" is equivalent to \"--SomeSwitch\"\r\n                keyStartIndex = 1;\r\n            }\r\n\r\n            // if we received a new argument, but we expected a value, add the previous key with the value \"true\"\r\n            if (expectedValue) {\r\n                expectedValue = false;\r\n\r\n                if (keyStartIndex > 0) {\r\n                    // set the previous key to true and continue with processing the current arg\r\n                    target[key] = true;\r\n                }\r\n                else {\r\n                    target[key] = Args._unescape(currentArg);\r\n                    continue;\r\n                }\r\n            }\r\n\r\n            // currentArg starts a new argument\r\n            var separator = currentArg.indexOf('=');\r\n\r\n            if (separator >= 0) {\r\n                // currentArg specifies a key with value\r\n                key = Args._unescape(currentArg.substr(keyStartIndex, separator - keyStartIndex));\r\n                value = Args._unescape(currentArg.substr(separator + 1));\r\n            }\r\n            else {\r\n                // currentArg specifies only a key\r\n                // If there is no prefix in current argument, consider it as a key with value \"true\"\r\n                if (keyStartIndex == 0) {\r\n                    key = Args._unescape(currentArg);\r\n                    value = true;\r\n                }\r\n                else {\r\n                    key = Args._unescape(currentArg.substr(keyStartIndex));\r\n                    expectedValue = true;\r\n                }\r\n            }\r\n\r\n            // Override value when key is duplicated. So we always have the last argument win.\r\n            if (!expectedValue) {\r\n                target[key] = value;\r\n            }\r\n        }\r\n\r\n        if (expectedValue) {\r\n            target[key] = true;\r\n        }\r\n\r\n        return target;\r\n    }\r\n\r\n    private static _unescape(value: string): string\r\n    {\r\n        if (value.startsWith(\"\\\"\") && value.endsWith(\"\\\"\"))\r\n        {\r\n            value = value.substr(1, value.length - 2);\r\n            return value.replace(\"\\\\\\\"\", \"\\\"\");\r\n        }\r\n\r\n        return value;\r\n    }\r\n}\r\n"]}