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import * as Food from 'food'
import * as Search from 'lib/search'
export interface Sort {
field: Field,
order: Order,
}
export enum Field {
Name,
GlycemicIndex,
Carbohydrates,
GlycemicLoad,
}
export enum Order {
Down,
Up,
}
export const init: Sort = {
field: Field.Name,
order: Order.Down,
}
export function aliments(a1: Food.Aliment, a2: Food.Aliment, sort: Sort) {
return getField(a1, sort.field) > getField(a2, sort.field)
? (sort.order === Order.Down ? 1 : -1)
: (sort.order === Order.Down ? -1 : 1)
}
function getField(a: Food.Aliment, sort: Field) {
if (sort === Field.Name) {
return Search.format(a.name)
} else if (sort === Field.GlycemicIndex) {
return a.glycemicIndex
} else if (sort === Field.Carbohydrates) {
return a.carbohydrates
} else {
return Food.glycemicLoad(a)
}
}
export function toggle(sort: Sort, field: Field): Sort {
return {
field,
order: sort.field === field ? reverseOrder(sort.order) : Order.Down
}
}
function reverseOrder(order: Order): Order {
return order === Order.Down ? Order.Up : Order.Down
}
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