Nestate

A simple state observing mechanism that only fires when the stored value is compared to true.

Components

State

Contains a callback function that fires depending on the truthfulness of validFn.

Action

Contains a callback function that fires depending on the truthfulness of the parent state.

Usage

var states = new Nestate()

Creates a new group of State and Action.

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Nestate.addState(key, value, options:{callbackFn?, validFn?})

Adds a new state into the group. Throws new Error when the key already exists.

key

The key of the state

value

The value of the state

options

Contains callbackFn and validFn. Defaults to:

options = {
    callbackFn: (val)=>{}, 
    validFn: (val)=>true
}

options.callbackFn

The callback function when validFn returns true.

options.validFn

State validity check function.

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Nestate.updateState(key, value)

Updates the value of the state by the key. Throws new Error when key is not found.

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Nestate.setStateCallback(key, callbackFn)

To be developed.

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Nestate.setStateValidFunction(key, validFn)

To be developed.

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Nestate.getState(key)

Returns the value of the state by key. Throws new Error when key is not found.

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Nestate.addAction(key, fn, dependsOn=[], options={})

Adds a new action depeding on the dependsOn array of states.

options.type

"AND" or "OR".

Flag	Effect
"AND"	All parents' validity must be true to fire the action
"OR"	Only requires one of the parents' validity to be true to fire the action

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