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author | Florian Dold <florian.dold@gmail.com> | 2019-12-02 00:42:40 +0100 |
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committer | Florian Dold <florian.dold@gmail.com> | 2019-12-02 00:42:40 +0100 |
commit | e1369ff7e8fc02116b9c4261036f0e42e3423cf4 (patch) | |
tree | c621067ebda8977a888bfed34b7bbecf64b3b0f0 /src/helpers.ts | |
parent | aaf7e1338d6cdb1b4e01ad318938b3eaea2f922b (diff) | |
download | wallet-core-e1369ff7e8fc02116b9c4261036f0e42e3423cf4.tar.xz |
the giant refactoring: split wallet into multiple parts
Diffstat (limited to 'src/helpers.ts')
-rw-r--r-- | src/helpers.ts | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/src/helpers.ts b/src/helpers.ts deleted file mode 100644 index 1983cee9b..000000000 --- a/src/helpers.ts +++ /dev/null @@ -1,203 +0,0 @@ -/* - This file is part of TALER - (C) 2016 GNUnet e.V. - - TALER is free software; you can redistribute it and/or modify it under the - terms of the GNU General Public License as published by the Free Software - Foundation; either version 3, or (at your option) any later version. - - TALER is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> - */ - -/** - * Small helper functions that don't fit anywhere else. - */ - -/** - * Imports. - */ -import { AmountJson } from "./amounts"; -import * as Amounts from "./amounts"; - -import URI = require("urijs"); -import { Timestamp } from "./walletTypes"; - -/** - * Show an amount in a form suitable for the user. - * FIXME: In the future, this should consider currency-specific - * settings such as significant digits or currency symbols. - */ -export function amountToPretty(amount: AmountJson): string { - const x = amount.value + amount.fraction / Amounts.fractionalBase; - return `${x} ${amount.currency}`; -} - - -/** - * Canonicalize a base url, typically for the exchange. - * - * See http://api.taler.net/wallet.html#general - */ -export function canonicalizeBaseUrl(url: string) { - if (!url.startsWith("http") && !url.startsWith("https")) { - url = "https://" + url; - } - const x = new URI(url); - x.path(x.path() + "/").normalizePath(); - x.fragment(""); - x.query(); - return x.href(); -} - - -/** - * Convert object to JSON with canonical ordering of keys - * and whitespace omitted. - */ -export function canonicalJson(obj: any): string { - // Check for cycles, etc. - JSON.stringify(obj); - if (typeof obj === "string" || typeof obj === "number" || obj === null) { - return JSON.stringify(obj); - } - if (Array.isArray(obj)) { - const objs: string[] = obj.map((e) => canonicalJson(e)); - return `[${objs.join(",")}]`; - } - const keys: string[] = []; - for (const key in obj) { - keys.push(key); - } - keys.sort(); - let s = "{"; - for (let i = 0; i < keys.length; i++) { - const key = keys[i]; - s += JSON.stringify(key) + ":" + canonicalJson(obj[key]); - if (i !== keys.length - 1) { - s += ","; - } - } - return s + "}"; -} - - -/** - * Check for deep equality of two objects. - * Only arrays, objects and primitives are supported. - */ -export function deepEquals(x: any, y: any): boolean { - if (x === y) { - return true; - } - - if (Array.isArray(x) && x.length !== y.length) { - return false; - } - - const p = Object.keys(x); - return Object.keys(y).every((i) => p.indexOf(i) !== -1) && - p.every((i) => deepEquals(x[i], y[i])); -} - - -/** - * Map from a collection to a list or results and then - * concatenate the results. - */ -export function flatMap<T, U>(xs: T[], f: (x: T) => U[]): U[] { - return xs.reduce((acc: U[], next: T) => [...f(next), ...acc], []); -} - - -/** - * Extract a numeric timstamp (in seconds) from the Taler date format - * ("/Date([n])/"). Returns null if input is not in the right format. - */ -export function getTalerStampSec(stamp: string): number | null { - const m = stamp.match(/\/?Date\(([0-9]*)\)\/?/); - if (!m || !m[1]) { - return null; - } - return parseInt(m[1], 10); -} - -/** - * Extract a timestamp from a Taler timestamp string. - */ -export function extractTalerStamp(stamp: string): Timestamp | undefined { - const m = stamp.match(/\/?Date\(([0-9]*)\)\/?/); - if (!m || !m[1]) { - return undefined; - } - return { - t_ms: parseInt(m[1], 10) * 1000, - }; -} - -/** - * Extract a timestamp from a Taler timestamp string. - */ -export function extractTalerStampOrThrow(stamp: string): Timestamp { - const r = extractTalerStamp(stamp); - if (!r) { - throw Error("invalid time stamp"); - } - return r; -} - -/** - * Check if a timestamp is in the right format. - */ -export function timestampCheck(stamp: string): boolean { - return getTalerStampSec(stamp) !== null; -} - - -/** - * Get a JavaScript Date object from a Taler date string. - * Returns null if input is not in the right format. - */ -export function getTalerStampDate(stamp: string): Date | null { - const sec = getTalerStampSec(stamp); - if (sec == null) { - return null; - } - return new Date(sec * 1000); -} - -/** - * Compute the hash function of a JSON object. - */ -export function hash(val: any): number { - const str = canonicalJson(val); - // https://github.com/darkskyapp/string-hash - let h = 5381; - let i = str.length; - while (i) { - h = (h * 33) ^ str.charCodeAt(--i); - } - - /* JavaScript does bitwise operations (like XOR, above) on 32-bit signed - * integers. Since we want the results to be always positive, convert the - * signed int to an unsigned by doing an unsigned bitshift. */ - return h >>> 0; -} - - -/** - * Lexically compare two strings. - */ -export function strcmp(s1: string, s2: string): number { - if (s1 < s2) { - return -1; - } - if (s1 > s2) { - return 1; - } - return 0; -} |