The defaultValueSetter property is a function that takes a ModelItem object as a parameter and returns a promise that resolves to a value of type T. It is used to set the default value of the ModelItem. When the ModelItem is initialized, if the value is not populated from persistence, the defaultValueSetter function is called to set the default value of the ModelItem. The function can perform any necessary logic to determine the default value and return it as a promise.

The public identifier: string; line is declaring a public property identifier of type string in the ModelItem class. This property is used to uniquely identify the model item within the model. It can be used to retrieve or set the value of the model item using its identifier.

The above code is defining a public property called initFunction which is a function that takes a parameter modelItem of type ModelItem<T>. The function returns a Promise that resolves to void.

The line public initialised = false; is declaring a public property initialised with a default value of false. This property is used to track whether the ModelItem has been initialized or not. It is initially set to false and can be updated to true once the init method is called on the ModelItem.

The line public isModelItem = true; // identifies this as a modalItem when type unknown is declaring a public property isModelItem with a default value of true. This property is used to identify an instance of the ModelItem class when its type is unknown. It can be used to check if an object is an instance of ModelItem even if its type information is not available.

The above code is defining a class in TypeScript with a protected property called "logging" that is set to false.

The above code is declaring a protected property named "persistable" and assigning it a value of false.

The line public persistableOnConfigurables = false; is declaring a public property persistableOnConfigurables with a default value of false in the ModelItem class. This property is used to determine whether the model item should be persisted on configurable variables. If set to true, the model item's value will be persisted when the configurable variables are saved. If set to false, the model item's value will not be persisted on configurable variables.

The above code is declaring a protected property called "persister" with a type of either null or Persister.

The line public populatedOnInit = false; is declaring a public property populatedOnInit with a default value of false. This property is used to track whether the ModelItem has been populated with a value during initialization or not. It is initially set to false and can be updated to true once the populateValueOnInit method is called on the ModelItem.

The postPersistConverter property is a function that takes a ModelItem object and a value of type unknown as parameters and returns a promise that resolves to a value of type T. It is used as a converter function to transform the value retrieved from persistence before it is set as the value of the ModelItem. This allows for custom logic to be applied to the retrieved value before it is used.

The line public prePersistConverter: (modelItem: ModelItem<T>) => unknown; is declaring a public property prePersistConverter in the ModelItem class. This property is a function that takes a ModelItem object as a parameter and returns a value of type unknown. It is used as a converter function to transform the value of the ModelItem before persisting it. This allows for custom logic to be applied to the value before it is stored in a persister.

The above code is declaring a protected property called "services" of type "Record<string, unknown>". The "services" property is an object that can hold key-value pairs, where the keys are strings and the values can be of any type.

The above code is declaring a public variable called valueObs of type Observable<T>.

The above code is declaring a protected variable called valueSource of type BehaviorSubject<T>.

Current Value

The getContext function returns the context associated with a given identifier in the modelContext array.

a string value.

The Model that this item is registered to.

The function getPersistedValue returns a promise that resolves to the persisted value of a model item, if available.

A Promise that resolves to an unknown value.

The function getService retrieves a service based on its id and returns it, or logs an error if the service is not set. service that you want to retrieve from the services object.

The init function initializes the object with the provided services and executes an optional initialization function before marking the object as initialized. unknown values. It is used to store various services or dependencies that the class or function may need to access or use.

The log function logs a message and optional parameters if logging is enabled. meaning it can be omitted when calling the function. its elements.

The function "make" creates a new instance of the ModelItem class with a specified default value. to the ModelItem object. It is of type T1, which means it can be any type specified when calling the make method. defaultValue as its constructor argument.

The method is returning an instance of the ModelItem<T1> class with the specified defaultValue as its constructor argument.

The function "makeNullable" returns a new instance of "ModelItem" with a default value that can be null or of type T1. that allows you to specify a default value for the ModelItem. It has a type of null | T1, which means it can either be null or of type T1. If no value is provided for defaultValue, it null | T1, where T1 is a type parameter. The constructor of ModelItem is being called with the defaultValue parameter as an argument.

The method is returning a new instance of the ModelItem class with a generic type of null | T1, where T1 is a type parameter. The constructor of ModelItem is being called with the defaultValue parameter as an argument.

The function "populateValueOnInit" checks if a model item exists, sets its value from persistence, sets a default value if necessary, and marks it as populated on initialization.

Sets the value

The function sets a default value for a model item using a provided callback function. modelItem of type ModelItem<T> and returns a Promise of type T. It is used to set the default value for the modelItem.

The function setFromDefault sets the value of a model item from its default value, if available.

The function setFromDefault() returns a Promise that resolves to void.

The function setFromPersistence retrieves a persisted value, converts it if necessary, and sets it on the model item.

a Promise that resolves to void (undefined).

The function sets the identifier property of an object and returns the object itself.

The setInitFunction method sets the initialization function for a model item and returns the instance of the class. argument and returns a Promise that resolves to void.

The function sets the value of the "initialised" property to true by default, but can also accept a different value. an object or variable has been initialized or not.

The function sets the persistable property of an object and returns the object itself. an object should be persisted or not. If set to true, the object will be saved and stored for future use. If set to false, the object will not be persisted and will not be saved for future use.

The function sets the value of the "persistableOnConfigurables" property and returns the instance of the class. on configurables.

The function sets the persister property of an object and returns the object itself. It is used to set the persister for the current object.

The function sets pre-persist and post-persist converters for a model item. ModelItem and converts it to an unknown type. It is used before persisting the modelItem. modelItem and value. It is used to convert the persisted value back to its original type T. The modelItem parameter represents the ModelItem object that was persisted, and the value parameter represents the persisted value. The function should return a Promise

Results in the emitting of a notifications of change, but with the same value as before.