feat(auth): implement user authentication system

backend/node_modules/color-string/LICENSE

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+Copyright (c) 2011 Heather Arthur <fayearthur@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

backend/node_modules/color-string/README.md

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+# color-string
+
+> library for parsing and generating CSS color strings.
+
+## Install
+
+```sh
+npm install color-string
+```
+
+## Usage
+
+### Parsing
+
+```js
+colorString.get('#FFF')                          // {model: 'rgb', value: [255, 255, 255, 1]}
+colorString.get('#FFFA')                         // {model: 'rgb', value: [255, 255, 255, 0.67]}
+colorString.get('#FFFFFFAA')                     // {model: 'rgb', value: [255, 255, 255, 0.67]}
+colorString.get('hsl(360, 100%, 50%)')           // {model: 'hsl', value: [0, 100, 50, 1]}
+colorString.get('hsl(360 100% 50%)')             // {model: 'hsl', value: [0, 100, 50, 1]}
+colorString.get('hwb(60, 3%, 60%)')              // {model: 'hwb', value: [60, 3, 60, 1]}
+
+colorString.get.rgb('#FFF')                      // [255, 255, 255, 1]
+colorString.get.rgb('blue')                      // [0, 0, 255, 1]
+colorString.get.rgb('rgba(200, 60, 60, 0.3)')    // [200, 60, 60, 0.3]
+colorString.get.rgb('rgba(200 60 60 / 0.3)')     // [200, 60, 60, 0.3]
+colorString.get.rgb('rgba(200 60 60 / 30%)')     // [200, 60, 60, 0.3]
+colorString.get.rgb('rgb(200, 200, 200)')        // [200, 200, 200, 1]
+colorString.get.rgb('rgb(200 200 200)')          // [200, 200, 200, 1]
+
+colorString.get.hsl('hsl(360, 100%, 50%)')       // [0, 100, 50, 1]
+colorString.get.hsl('hsl(360 100% 50%)')         // [0, 100, 50, 1]
+colorString.get.hsl('hsla(360, 60%, 50%, 0.4)')  // [0, 60, 50, 0.4]
+colorString.get.hsl('hsl(360 60% 50% / 0.4)')    // [0, 60, 50, 0.4]
+
+colorString.get.hwb('hwb(60 3% 60%)')            // [60, 3, 60, 1]
+colorString.get.hwb('hwb(60, 3%, 60%)')          // [60, 3, 60, 1]
+colorString.get.hwb('hwb(60, 3%, 60%, 0.6)')     // [60, 3, 60, 0.6]
+
+colorString.get.rgb('invalid color string')      // null
+```
+
+### Generation
+
+```js
+colorString.to.hex(255, 255, 255)     // "#FFFFFF"
+colorString.to.hex(0, 0, 255, 0.4)    // "#0000FF66"
+colorString.to.hex(0, 0, 255, 0.4)    // "#0000FF66"
+colorString.to.rgb(255, 255, 255)     // "rgb(255, 255, 255)"
+colorString.to.rgb(0, 0, 255, 0.4)    // "rgba(0, 0, 255, 0.4)"
+colorString.to.rgb(0, 0, 255, 0.4)    // "rgba(0, 0, 255, 0.4)"
+colorString.to.rgb.percent(0, 0, 255) // "rgb(0%, 0%, 100%)"
+colorString.to.keyword(255, 255, 0)   // "yellow"
+colorString.to.hsl(360, 100, 100)     // "hsl(360, 100%, 100%)"
+colorString.to.hwb(50, 3, 15)         // "hwb(50, 3%, 15%)"
+```
+
+## License
+
+MIT

backend/node_modules/color-string/index.d.ts

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+export type Model = 'rgb' | 'hsl' | 'hwb';
+
+export type ColorString = {
+	get: {
+		(color: string): {model: Model; value: number[]} | null;
+		rgb: (color: string) => number[] | null;
+		hsl: (color: string) => number[] | null;
+		hwb: (color: string) => number[] | null;
+	};
+	to: {
+		hex: (r: number, g: number, b: number, a?: number) => string | null;
+		rgb: {
+			(r: number, g: number, b: number, a?: number): string | null;
+			percent: (r: number, g: number, b: number, a?: number) => string | null;
+		};
+		keyword: (r: number, g: number, b: number, a?: number) => string | null;
+		hsl: (h: number, s: number, l: number, a?: number) => string | null;
+		hwb: (h: number, w: number, b: number, a?: number) => string | null;
+	};
+};
+
+declare const colorString: ColorString;
+export default colorString;

backend/node_modules/color-string/index.js

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+import colorNames from 'color-name';
+
+const reverseNames = Object.create(null);
+
+// Create a list of reverse color names
+for (const name in colorNames) {
+	if (Object.hasOwn(colorNames, name)) {
+		reverseNames[colorNames[name]] = name;
+	}
+}
+
+const cs = {
+	to: {},
+	get: {},
+};
+
+cs.get = function (string) {
+	const prefix = string.slice(0, 3).toLowerCase();
+	let value;
+	let model;
+	switch (prefix) {
+		case 'hsl': {
+			value = cs.get.hsl(string);
+			model = 'hsl';
+			break;
+		}
+
+		case 'hwb': {
+			value = cs.get.hwb(string);
+			model = 'hwb';
+			break;
+		}
+
+		default: {
+			value = cs.get.rgb(string);
+			model = 'rgb';
+			break;
+		}
+	}
+
+	if (!value) {
+		return null;
+	}
+
+	return {model, value};
+};
+
+cs.get.rgb = function (string) {
+	if (!string) {
+		return null;
+	}
+
+	const abbr = /^#([a-f\d]{3,4})$/i;
+	const hex = /^#([a-f\d]{6})([a-f\d]{2})?$/i;
+	const rgba = /^rgba?\(\s*([+-]?(?:\d*\.)?\d+(?:e\d+)?)(?=[\s,])\s*(?:,\s*)?([+-]?(?:\d*\.)?\d+(?:e\d+)?)(?=[\s,])\s*(?:,\s*)?([+-]?(?:\d*\.)?\d+(?:e\d+)?)\s*(?:[\s,|/]\s*([+-]?(?:\d*\.)?\d+(?:e\d+)?)(%?)\s*)?\)$/i;
+	const per = /^rgba?\(\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*(?:[\s,|/]\s*([+-]?[\d.]+)(%?)\s*)?\)$/i;
+	const keyword = /^(\w+)$/;
+
+	let rgb = [0, 0, 0, 1];
+	let match;
+	let i;
+	let hexAlpha;
+
+	if (match = string.match(hex)) {
+		hexAlpha = match[2];
+		match = match[1];
+
+		for (i = 0; i < 3; i++) {
+			// https://jsperf.com/slice-vs-substr-vs-substring-methods-long-string/19
+			const i2 = i * 2;
+			rgb[i] = Number.parseInt(match.slice(i2, i2 + 2), 16);
+		}
+
+		if (hexAlpha) {
+			rgb[3] = Number.parseInt(hexAlpha, 16) / 255;
+		}
+	} else if (match = string.match(abbr)) {
+		match = match[1];
+		hexAlpha = match[3];
+
+		for (i = 0; i < 3; i++) {
+			rgb[i] = Number.parseInt(match[i] + match[i], 16);
+		}
+
+		if (hexAlpha) {
+			rgb[3] = Number.parseInt(hexAlpha + hexAlpha, 16) / 255;
+		}
+	} else if (match = string.match(rgba)) {
+		for (i = 0; i < 3; i++) {
+			rgb[i] = Number.parseFloat(match[i + 1]);
+		}
+
+		if (match[4]) {
+			rgb[3] = match[5] ? Number.parseFloat(match[4]) * 0.01 : Number.parseFloat(match[4]);
+		}
+	} else if (match = string.match(per)) {
+		for (i = 0; i < 3; i++) {
+			rgb[i] = Math.round(Number.parseFloat(match[i + 1]) * 2.55);
+		}
+
+		if (match[4]) {
+			rgb[3] = match[5] ? Number.parseFloat(match[4]) * 0.01 : Number.parseFloat(match[4]);
+		}
+	} else if (match = string.toLowerCase().match(keyword)) {
+		if (match[1] === 'transparent') {
+			return [0, 0, 0, 0];
+		}
+
+		if (!Object.hasOwn(colorNames, match[1])) {
+			return null;
+		}
+
+		// eslint-disable-next-line unicorn/prefer-spread
+		rgb = colorNames[match[1]].slice();
+		rgb[3] = 1;
+
+		return rgb;
+	} else {
+		return null;
+	}
+
+	for (i = 0; i < 3; i++) {
+		rgb[i] = clamp(rgb[i], 0, 255);
+	}
+
+	rgb[3] = clamp(rgb[3], 0, 1);
+
+	return rgb;
+};
+
+cs.get.hsl = function (string) {
+	if (!string) {
+		return null;
+	}
+
+	const hsl = /^hsla?\(\s*([+-]?(?:\d{0,3}\.)?\d+)(?:deg)?\s*,?\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*(?:[,|/]\s*([+-]?(?=\.\d|\d)(?:0|[1-9]\d*)?(?:\.\d*)?(?:e[+-]?\d+)?)\s*)?\)$/i;
+	const match = string.match(hsl);
+
+	if (match) {
+		const alpha = Number.parseFloat(match[4]);
+		const h = ((Number.parseFloat(match[1]) % 360) + 360) % 360;
+		const s = clamp(Number.parseFloat(match[2]), 0, 100);
+		const l = clamp(Number.parseFloat(match[3]), 0, 100);
+		const a = clamp(Number.isNaN(alpha) ? 1 : alpha, 0, 1);
+
+		return [h, s, l, a];
+	}
+
+	return null;
+};
+
+cs.get.hwb = function (string) {
+	if (!string) {
+		return null;
+	}
+
+	const hwb = /^hwb\(\s*([+-]?\d{0,3}(?:\.\d+)?)(?:deg)?\s*[\s,]\s*([+-]?[\d.]+)%\s*[\s,]\s*([+-]?[\d.]+)%\s*(?:[\s,]\s*([+-]?(?=\.\d|\d)(?:0|[1-9]\d*)?(?:\.\d*)?(?:e[+-]?\d+)?)\s*)?\)$/i;
+	const match = string.match(hwb);
+
+	if (match) {
+		const alpha = Number.parseFloat(match[4]);
+		const h = ((Number.parseFloat(match[1]) % 360) + 360) % 360;
+		const w = clamp(Number.parseFloat(match[2]), 0, 100);
+		const b = clamp(Number.parseFloat(match[3]), 0, 100);
+		const a = clamp(Number.isNaN(alpha) ? 1 : alpha, 0, 1);
+		return [h, w, b, a];
+	}
+
+	return null;
+};
+
+cs.to.hex = function (...rgba) {
+	return (
+		'#' +
+		hexDouble(rgba[0]) +
+		hexDouble(rgba[1]) +
+		hexDouble(rgba[2]) +
+		(rgba[3] < 1
+			? (hexDouble(Math.round(rgba[3] * 255)))
+			: '')
+	);
+};
+
+cs.to.rgb = function (...rgba) {
+	return rgba.length < 4 || rgba[3] === 1
+		? 'rgb(' + Math.round(rgba[0]) + ', ' + Math.round(rgba[1]) + ', ' + Math.round(rgba[2]) + ')'
+		: 'rgba(' + Math.round(rgba[0]) + ', ' + Math.round(rgba[1]) + ', ' + Math.round(rgba[2]) + ', ' + rgba[3] + ')';
+};
+
+cs.to.rgb.percent = function (...rgba) {
+	const r = Math.round(rgba[0] / 255 * 100);
+	const g = Math.round(rgba[1] / 255 * 100);
+	const b = Math.round(rgba[2] / 255 * 100);
+
+	return rgba.length < 4 || rgba[3] === 1
+		? 'rgb(' + r + '%, ' + g + '%, ' + b + '%)'
+		: 'rgba(' + r + '%, ' + g + '%, ' + b + '%, ' + rgba[3] + ')';
+};
+
+cs.to.hsl = function (...hsla) {
+	return hsla.length < 4 || hsla[3] === 1
+		? 'hsl(' + hsla[0] + ', ' + hsla[1] + '%, ' + hsla[2] + '%)'
+		: 'hsla(' + hsla[0] + ', ' + hsla[1] + '%, ' + hsla[2] + '%, ' + hsla[3] + ')';
+};
+
+// Hwb is a bit different than rgb(a) & hsl(a) since there is no alpha specific syntax
+// (hwb have alpha optional & 1 is default value)
+cs.to.hwb = function (...hwba) {
+	let a = '';
+	if (hwba.length >= 4 && hwba[3] !== 1) {
+		a = ', ' + hwba[3];
+	}
+
+	return 'hwb(' + hwba[0] + ', ' + hwba[1] + '%, ' + hwba[2] + '%' + a + ')';
+};
+
+cs.to.keyword = function (...rgb) {
+	return reverseNames[rgb.slice(0, 3)];
+};
+
+// Helpers
+function clamp(number_, min, max) {
+	return Math.min(Math.max(min, number_), max);
+}
+
+function hexDouble(number_) {
+	const string_ = Math.round(number_).toString(16).toUpperCase();
+	return (string_.length < 2) ? '0' + string_ : string_;
+}
+
+export default cs;

backend/node_modules/color-string/package.json

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+{
+  "name": "color-string",
+  "description": "Parser and generator for CSS color strings",
+  "version": "2.1.4",
+  "author": "Josh Junon (https://github.com/qix-)",
+  "contributors": [
+    "Maxime Thirouin",
+    "Dyma Ywanov <dfcreative@gmail.com>",
+    "Heather Arthur <fayearthur@gmail.com>",
+    "LitoMore (https://github.com/LitoMore)"
+  ],
+  "repository": "Qix-/color-string",
+  "type": "module",
+  "exports": "./index.js",
+  "types": "./index.d.ts",
+  "engines": {
+    "node": ">=18"
+  },
+  "scripts": {
+    "test": "xo && tsd && node test.js"
+  },
+  "license": "MIT",
+  "files": [
+    "index.js",
+    "index.d.ts"
+  ],
+  "xo": {
+    "rules": {
+      "no-cond-assign": 0,
+      "operator-linebreak": 0,
+      "@typescript-eslint/ban-types": 0
+    }
+  },
+  "dependencies": {
+    "color-name": "^2.0.0"
+  },
+  "devDependencies": {
+    "tsd": "^0.31.2",
+    "xo": "^0.60.0"
+  },
+  "keywords": [
+    "color",
+    "colour",
+    "rgb",
+    "css"
+  ]
+}