@angular-package/property
Version:
Features to handle object properties.
83 lines • 15.3 kB
JavaScript
var _WrapProperty_instances, _WrapProperty_descriptors, _WrapProperty_object, _WrapProperty_wrapped, _WrapProperty_wrappedValues, _WrapProperty_wrap;
import { __classPrivateFieldGet, __classPrivateFieldSet } from "tslib";
import { Descriptors } from '../descriptor/lib/descriptors.class';
export class WrapProperty {
constructor(object, ...names) {
_WrapProperty_instances.add(this);
_WrapProperty_descriptors.set(this, void 0);
_WrapProperty_object.set(this, void 0);
_WrapProperty_wrapped.set(this, new Set());
_WrapProperty_wrappedValues.set(this, new Map());
__classPrivateFieldSet(this, _WrapProperty_object, object, "f");
__classPrivateFieldSet(this, _WrapProperty_descriptors, new Descriptors(object, ...names), "f");
}
get descriptors() {
return __classPrivateFieldGet(this, _WrapProperty_descriptors, "f");
}
get wrapped() {
return __classPrivateFieldGet(this, _WrapProperty_wrapped, "f");
}
get wrappedValues() {
return __classPrivateFieldGet(this, _WrapProperty_wrappedValues, "f");
}
wrap(names, getterCallback, setterCallback) {
Array.isArray(names)
? names.forEach(name => __classPrivateFieldGet(this, _WrapProperty_instances, "m", _WrapProperty_wrap).call(this, __classPrivateFieldGet(this, _WrapProperty_object, "f"), name, getterCallback, setterCallback))
: __classPrivateFieldGet(this, _WrapProperty_instances, "m", _WrapProperty_wrap).call(this, __classPrivateFieldGet(this, _WrapProperty_object, "f"), names, getterCallback, setterCallback);
return this;
}
unwrap(...names) {
Array.isArray(names) &&
names.forEach((name) => (__classPrivateFieldGet(this, _WrapProperty_wrapped, "f").delete(name),
Object.defineProperty(__classPrivateFieldGet(this, _WrapProperty_object, "f"), name, {
...__classPrivateFieldGet(this, _WrapProperty_descriptors, "f").get(name),
})));
return this;
}
}
_WrapProperty_descriptors = new WeakMap(), _WrapProperty_object = new WeakMap(), _WrapProperty_wrapped = new WeakMap(), _WrapProperty_wrappedValues = new WeakMap(), _WrapProperty_instances = new WeakSet(), _WrapProperty_wrap = function _WrapProperty_wrap(object, name, getterCallback, setterCallback) {
const thisInstance = this;
if (__classPrivateFieldGet(this, _WrapProperty_wrapped, "f").has(name) === false) {
if (typeof object === 'object' || typeof object === 'function') {
__classPrivateFieldGet(this, _WrapProperty_descriptors, "f").has(name) === false &&
__classPrivateFieldGet(this, _WrapProperty_descriptors, "f").setPicked(object, name);
const detectedSource = typeof object === 'function' ? object.prototype : object;
__classPrivateFieldGet(this, _WrapProperty_wrappedValues, "f").set(name, detectedSource[name]);
Object.defineProperty(detectedSource, name, {
configurable: true,
enumerable: false,
get() {
let result;
thisInstance.descriptors.has(name) &&
thisInstance.descriptors
.get(name)
?.get?.apply(this, arguments);
typeof getterCallback === 'function' &&
(result = getterCallback(name, this));
return result || thisInstance.wrappedValues.get(name);
},
set(value) {
const oldValue = thisInstance.wrappedValues.get(name);
thisInstance.descriptors.has(name) &&
thisInstance.descriptors
.get(name)
?.set?.apply(this, arguments);
thisInstance.wrappedValues.set(name, value);
typeof setterCallback === 'function' &&
setterCallback(value, oldValue, name, this);
},
});
__classPrivateFieldGet(this, _WrapProperty_wrapped, "f").add(name);
}
else {
throw new Error(`Problem: Argument \`object\`: ${object} must be generic type variable \`Obj\`.
Quick fix: Check the passed object in the constructor.
`);
}
}
else {
throw new Error(`Problem: Property \`name\`: ${String(name)} is already wrapped.`);
}
return this;
};
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names.forEach(name => this.#wrap(this.#object, name, getterCallback, setterCallback))\n      : this.#wrap(this.#object, names, getterCallback, setterCallback);\n    return this;\n  }\n\n  /**\n   *\n   * @param names\n   * @returns\n   * @angularpackage\n   */\n  public unwrap(...names: Names[]): this {\n    Array.isArray(names) &&\n      names.forEach(\n        (name) => (\n          // Remove from the #wrapped storage.\n          this.#wrapped.delete(name),\n          Object.defineProperty(this.#object, name, {\n            ...this.#descriptors.get(name),\n          })\n        )\n      );\n    return this;\n  }\n\n  /**\n   * TODO: Check wrapping for union types.\n   * Wrapper for source object property.\n   * @param object Source object as decorator function or component type to wrap properties.\n   * @param name Source object property key to wrap value.\n   * @param getterCallback Function to wrap source property getter.\n   * @param setterCallback Function to wrap source property setter.\n   * @angularpackage\n   */\n  #wrap<Name extends Names>(\n    object: Obj,\n    name: Name,\n    getterCallback?: GetterCallback<Obj, Name>,\n    setterCallback?: SetterCallback<Obj, Name>\n  ): this {\n    const thisInstance = this;\n    if (this.#wrapped.has(name) === false) {\n      if (typeof object === 'object' || typeof object === 'function') {\n        // If the descriptor is not already found set the original descriptor if exists.\n        this.#descriptors.has(name) === false &&\n          this.#descriptors.setPicked(object, name);\n\n        // Detect source.\n        const detectedSource =\n          typeof object === 'function' ? object.prototype : object;\n\n        // Sets the default value to wrapped property.\n        this.#wrappedValues.set(name, detectedSource[name]);\n\n        // Define property.\n        Object.defineProperty(detectedSource, name, {\n          configurable: true,\n          // If true then Maximum call exceeded.\n          enumerable: false,\n          get(): Obj[Name] {\n            // Prepare variable to return.\n            let result;\n            // Perform stored getter.\n            thisInstance.descriptors.has(name) &&\n              thisInstance.descriptors\n                .get(name)\n                ?.get?.apply(this, arguments as any);\n\n            // Custom getter.\n            typeof getterCallback === 'function' &&\n              (result = getterCallback(name, this));\n\n            // Returns the value.\n            return result || thisInstance.wrappedValues.get(name);\n          },\n          set(value: Obj[Name]): void {\n            // Store the old value to pass to setterCallback.\n            const oldValue = thisInstance.wrappedValues.get(name);\n            // Perform stored setter.\n            thisInstance.descriptors.has(name) &&\n              thisInstance.descriptors\n                .get(name)\n                ?.set?.apply(this, arguments as any);\n            // Set the value.\n            thisInstance.wrappedValues.set(name, value);\n            // Use custom setter.\n            typeof setterCallback === 'function' &&\n              setterCallback(value, oldValue, name, this);\n          },\n        });\n        this.#wrapped.add(name);\n      } else {\n        throw new Error(\n          `Problem: Argument \\`object\\`: ${object} must be generic type variable \\`Obj\\`.\n          Quick fix: Check the passed object in the constructor.\n          `\n        );\n      }\n    } else {\n      throw new Error(\n        `Problem: Property \\`name\\`: ${String(name)} is already wrapped.`\n      );\n    }\n    return this;\n  }\n}\n"]}