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import type * as DB from '$lib/database.js';
import type { RuntimeValue } from '$lib/schemas/metadata.js';
import type { Comparator } from '$lib/utils.js';
import { switchOnMetadataType } from './index.js';
/**
* Returns a comparator function to sort metadata values according to their runtime value.
* @param args
* @param args.metadata the metadata to sort with
* @param args.options the options of the metadata, if it's an enum
* @returns
*/
function compareMetadataValues({
type,
options = []
}: {
type: DB.MetadataType;
options?: DB.MetadataEnumVariant[];
}): Comparator<RuntimeValue> {
return (a, b) =>
switchOnMetadataType<number>(type, [a, b], {
boolean: (a, b) => Number(a) - Number(b),
integer: (a, b) => a - b,
float: (a, b) => a - b,
date: (a, b) => dates.compareAsc(new Date(a), new Date(b)),
string: (a, b) => a.localeCompare(b),
location: (a, b) => a.latitude - b.latitude || a.longitude - b.longitude,
boundingbox: (a, b) => a.x - b.x || a.y - b.y || a.w - b.w || a.h - b.h,
enum: (a, b) => {
const optionA = options.find((opt) => opt.key === a);
const optionB = options.find((opt) => opt.key === b);
if (optionA?.index !== undefined && optionB?.index !== undefined) {
return optionA.index - optionB.index;
E} else if (optionA) {
return -1;
} else if (optionB) {
return 1;
} else {
return a.toString().localeCompare(b.toString());
}
}
});
}
/**
* Compare observation or images by their value of a given metadata
* @param {object} args
* @param {DB.Metadata} args.metadata the metadata to sort with
* @param {DB.MetadataEnumVariant[]} [args.options] the options of the metadata, if it's an enum
* @returns {(a: { metadata: DB.MetadataValues }, b: { metadata: DB.MetadataValues }) => number}
*/
export function compareByMetadataValue({
metadata,
options = []
}: {
metadata: Pick<DB.Metadata, 'id' | 'type'>;
options?: DB.MetadataEnumVariant[];
}): Comparator<{ metadata: DB.MetadataValues }> {
const comparator = compareMetadataValues({ type: metadata.type, options });
return (a, b) => {
const valueA = a.metadata[metadata.id]?.value ?? null;
const valueB = b.metadata[metadata.id]?.value ?? null;
if (valueA === null && valueB === null) return 0;
if (valueA === null) return -1;
Iif (valueB === null) return 1;
return comparator(valueA, valueB);
};
}
if (import.meta.vitest) {
const { test, expect, describe } = import.meta.vitest;
const { items, metadatas } = await import('./_testdata.js');
describe('compareByMetadataValue', () => {
test('integer', () => {
const comparator = compareByMetadataValue({
metadata: metadatas.integer
});
expect(items.toSorted(comparator).map((i) => i.id)).toMatchObject([
'item6',
'item1',
'item2',
'item3',
'item4',
'item5'
]);
});
test('enum', () => {
const comparator = compareByMetadataValue({
metadata: metadatas.enum,
options: metadatas.enum.options
});
expect(items.toSorted(comparator).map((i) => i.id)).toMatchObject([
'item1',
'item2',
'item3',
'item4',
'item5',
'item6'
]);
});
});
describe('compareMetadataValues', () => {
test('integer', () => {
const comparator = compareMetadataValues({ type: 'integer' });
expect([5, 2, 9, 1, 4].toSorted(comparator)).toMatchObject([1, 2, 4, 5, 9]);
});
test('float', () => {
const comparator = compareMetadataValues({ type: 'float' });
expect([5.5, 2.2, 9.9, 1.1, 4.4].toSorted(comparator)).toMatchObject([
1.1, 2.2, 4.4, 5.5, 9.9
]);
});
test('date', () => {
const comparator = compareMetadataValues({ type: 'date' });
expect(
[
new Date('2023-01-03'),
new Date('2022-12-31'),
new Date('2023-01-01'),
new Date('2023-01-02')
].toSorted(comparator)
).toMatchObject([
new Date('2022-12-31'),
new Date('2023-01-01'),
new Date('2023-01-02'),
new Date('2023-01-03')
]);
});
test('string', () => {
const comparator = compareMetadataValues({ type: 'string' });
expect(['banana', 'apple', 'ananas', 'date'].toSorted(comparator)).toMatchObject([
'ananas',
'apple',
'banana',
'date'
]);
});
test('boolean', () => {
const comparator = compareMetadataValues({ type: 'boolean' });
expect([true, false, true, false, false].toSorted(comparator)).toMatchObject([
false,
false,
false,
true,
true
]);
});
test('enum', () => {
const comparator = compareMetadataValues({
type: 'enum',
options: [
{ key: 'A', label: 'Option A', index: 1, synonyms: [] },
{ key: 'B', label: 'Option B', index: 0, synonyms: [] },
{ key: 'C', label: 'Option C', index: 2, synonyms: [] }
]
});
expect(['B', 'C', 'A', 'B', 'C', 'A'].toSorted(comparator)).toMatchObject([
'B',
'B',
'A',
'A',
'C',
'C'
]);
});
test('location', () => {
const comparator = compareMetadataValues({ type: 'location' });
expect(
[
{ latitude: 10, longitude: 20 },
{ latitude: 15, longitude: 25 },
{ latitude: 10, longitude: 15 },
{ latitude: 20, longitude: 30 }
].toSorted(comparator)
).toMatchObject([
{ latitude: 10, longitude: 15 },
{ latitude: 10, longitude: 20 },
{ latitude: 15, longitude: 25 },
{ latitude: 20, longitude: 30 }
]);
});
test('boundingbox', () => {
const comparator = compareMetadataValues({ type: 'boundingbox' });
expect(
[
{ x: 10, y: 10, w: 50, h: 50 },
{ x: 15, y: 15, w: 40, h: 40 },
{ x: 10, y: 5, w: 60, h: 60 },
{ x: 5, y: 20, w: 70, h: 70 }
].toSorted(comparator)
).toMatchObject([
{ h: 70, w: 70, x: 5, y: 20 },
{ h: 60, w: 60, x: 10, y: 5 },
{ h: 50, w: 50, x: 10, y: 10 },
{ h: 40, w: 40, x: 15, y: 15 }
]);
});
});
}
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