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Use alphabet from js-sdk

pull/21833/head
Michael Telatynski 2021-06-14 21:32:11 +01:00
parent 8fd72fcf79
commit 2879b9086c
2 changed files with 26 additions and 37 deletions
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13
src/utils/stringOrderField.ts
View File

@ -14,23 +14,16 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import { alphabetPad, baseToString, stringToBase } from "matrix-js-sdk/src/utils";
import { alphabetPad, baseToString, stringToBase, DEFAULT_ALPHABET } from "matrix-js-sdk/src/utils";
import { reorder } from "./arrays";
export const ALPHABET_START = 0x20;
export const ALPHABET_END = 0x7E;
export const ALPHABET = new Array(1 + ALPHABET_END - ALPHABET_START)
.fill(undefined)
.map((_, i) => String.fromCharCode(ALPHABET_START + i))
.join("");
export const midPointsBetweenStrings = (
a: string,
b: string,
count: number,
maxLen: number,
alphabet = ALPHABET,
alphabet = DEFAULT_ALPHABET,
): string[] => {
const padN = Math.min(Math.max(a.length, b.length), maxLen);
const padA = alphabetPad(a, padN, alphabet);
@ -144,7 +137,7 @@ export const reorderLexicographically = (
const prevOrder = newOrder[leftBoundIdx - 1]?.order ?? "";
const nextOrder = newOrder[rightBoundIdx + 1]?.order
?? String.fromCharCode(ALPHABET_END).repeat(prevOrder.length || 1);
?? DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 1).repeat(prevOrder.length || 1);
const changes = midPointsBetweenStrings(prevOrder, nextOrder, 1 + rightBoundIdx - leftBoundIdx, maxLen);

50
test/utils/stringOrderField-test.ts
View File

@ -15,13 +15,9 @@ limitations under the License.
*/
import { sortBy } from "lodash";
import { stringToBase, baseToString, averageBetweenStrings } from "matrix-js-sdk/src/utils";
import { stringToBase, baseToString, averageBetweenStrings, DEFAULT_ALPHABET } from "matrix-js-sdk/src/utils";
import {
ALPHABET,
midPointsBetweenStrings,
reorderLexicographically,
} from "../../src/utils/stringOrderField";
import { midPointsBetweenStrings, reorderLexicographically } from "../../src/utils/stringOrderField";
const moveLexicographicallyTest = (
orders: Array<string | undefined>,
@ -66,7 +62,7 @@ describe("stringOrderField", () => {
});
it("baseToString", () => {
expect(baseToString(BigInt(10))).toBe(ALPHABET[9]);
expect(baseToString(BigInt(10))).toBe(DEFAULT_ALPHABET[9]);
expect(baseToString(BigInt(10), "abcdefghijklmnopqrstuvwxyz")).toEqual("j");
expect(baseToString(BigInt(6241))).toEqual("`a");
expect(baseToString(BigInt(53), "abcdefghijklmnopqrstuvwxyz")).toEqual("ba");
@ -246,13 +242,13 @@ describe("stringOrderField", () => {
moveLexicographicallyTest(
[
ALPHABET.charAt(0),
DEFAULT_ALPHABET.charAt(0),
// Target
ALPHABET.charAt(1),
ALPHABET.charAt(2),
ALPHABET.charAt(3),
ALPHABET.charAt(4),
ALPHABET.charAt(5),
DEFAULT_ALPHABET.charAt(1),
DEFAULT_ALPHABET.charAt(2),
DEFAULT_ALPHABET.charAt(3),
DEFAULT_ALPHABET.charAt(4),
DEFAULT_ALPHABET.charAt(5),
],
5,
1,
@ -272,11 +268,11 @@ describe("stringOrderField", () => {
moveLexicographicallyTest(
[
ALPHABET.charAt(ALPHABET.length - 5),
ALPHABET.charAt(ALPHABET.length - 4),
ALPHABET.charAt(ALPHABET.length - 3),
ALPHABET.charAt(ALPHABET.length - 2),
ALPHABET.charAt(ALPHABET.length - 1),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 5),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 4),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 3),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 2),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 1),
],
1,
3,
@ -313,11 +309,11 @@ describe("stringOrderField", () => {
moveLexicographicallyTest(
[
ALPHABET.charAt(ALPHABET.length - 5),
ALPHABET.charAt(ALPHABET.length - 4),
ALPHABET.charAt(ALPHABET.length - 3),
ALPHABET.charAt(ALPHABET.length - 2),
ALPHABET.charAt(ALPHABET.length - 1),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 5),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 4),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 3),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 2),
DEFAULT_ALPHABET.charAt(DEFAULT_ALPHABET.length - 1),
],
4,
3,
@ -339,10 +335,10 @@ describe("stringOrderField", () => {
const fiftyFirstChar = " ".repeat(51);
expect(next(maxSpaceValue)).toBe(fiftyFirstChar);
expect(prev(fiftyFirstChar)).toBe(maxSpaceValue);
expect(Number(stringToBase(ALPHABET[0]))).toEqual(1);
expect(Number(stringToBase(ALPHABET[1]))).toEqual(2);
expect(ALPHABET[ALPHABET.length - 1]).toBe("~");
expect(ALPHABET[0]).toBe(" ");
expect(Number(stringToBase(DEFAULT_ALPHABET[0]))).toEqual(1);
expect(Number(stringToBase(DEFAULT_ALPHABET[1]))).toEqual(2);
expect(DEFAULT_ALPHABET[DEFAULT_ALPHABET.length - 1]).toBe("~");
expect(DEFAULT_ALPHABET[0]).toBe(" ");
});
});