Make State a class (39a42e51) · Commits · Technik / teaching / yalikejazz

static/js/state.mjs

+10 −9

Original line number	Diff line number	Diff line
		/** Read and modify the current state of the application. Allows saving to local storage. */

		export const currentState = {

		export class State {
		/**
		* Return if this is the first time the application was started
		*/
		@@ -10,7 +9,7 @@ export const currentState = {
		// firstStart === null: If the key firstStart doesn't even exist, we certainly started for the first time
		// firstStart === "true": Local storage can only store strings, so this is our way of casting to boolean
		return firstStart === null \|\| firstStart === "true"
		},
		}

		/**
		* Set if this is the first time the application was started
		@@ -21,7 +20,7 @@ export const currentState = {
		}

		localStorage.setItem("firstStart", value)
		},
		}

		/**
		* Get the index of the exercise the user is currently working on
		@@ -33,7 +32,7 @@ export const currentState = {
		} else {
		return parseInt(exerciseIndex, 10)
		}
		},
		}

		/**
		* Set the index of the exercise the user is currently working on.
		@@ -48,14 +47,14 @@ export const currentState = {
		// throw new Error(`Exercise index must be >= 0 and < exercises.length (${pooltest.exercises.length})`)

		localStorage.setItem("exerciseIndex", index)
		},
		}

		/**
		* Get a list of indices of all solved exercises
		*/
		get solvedExercises() {
		return JSON.parse(localStorage.getItem("solvedExercises")) \|\| []
		},
		}

		/**
		* Private setter for the list of all solved exercises
		@@ -63,7 +62,7 @@ export const currentState = {
		*/
		_setSolvedExercises(indices) {
		localStorage.setItem("solvedExercises", JSON.stringify(indices))
		},
		}

		/**
		* Mark the given exercise as solved
		@@ -80,7 +79,7 @@ export const currentState = {
		const newIndices = this.solvedExercises
		newIndices.push(exerciseIndex)
		this._setSolvedExercises(newIndices)
		},
		}

		/**
		* Return a string representation of the current state
		@@ -89,3 +88,5 @@ export const currentState = {
		return JSON.stringify(this)
		}
		}

		export const currentState = new State()