Improved markdown parser

This reverts commit 15ac52b6a0.

.gitignore

@@ -10,6 +10,7 @@ uploads
 public/momentum*js
 junit.xml
 /docs/
+main.mjs
 
 # Logs
 *.log

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/utils",
-	"version": "0.28.12",
+	"version": "0.30.4",
 	"description": "Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/cache.ts

@@ -31,6 +31,8 @@ export class Cache<K extends string | number | symbol, T> {
 	/** Await initial loading */
 	loading = new Promise<void>(r => this._loading = r);
 
+	get size() { return this.store.keys().toArray().length }
+
 	/**
 	 * Create new cache
 	 * @param {keyof T} key Default property to use as primary key

src/color.ts

@@ -1,12 +1,73 @@
+import {dec2Hex} from './math.ts';
+
 /**
  * Determine if either black or white provides more contrast to the provided color
- * @param {string} background Color to compare against
+ * @param {string} color Color to compare against
  * @return {"white" | "black"} Color with the most contrast
  */
-export function contrast(background: string): 'white' | 'black' {
-	const exploded = background?.match(background.length >= 6 ? /[0-9a-fA-F]{2}/g : /[0-9a-fA-F]/g);
+export function contrast(color: string): 'white' | 'black' {
+	const exploded = color?.match(color.length >= 6 ? /[0-9a-fA-F]{2}/g : /[0-9a-fA-F]/g);
 	if(!exploded || exploded?.length < 3) return 'black';
 	const [r, g, b] = exploded.map(hex => parseInt(hex.length == 1 ? `${hex}${hex}` : hex, 16));
 	const luminance = (0.299 * r + 0.587 * g + 0.114 * b) / 255;
 	return luminance > 0.5 ? 'black' : 'white';
 }
+
+export function hex2Int(hex: string): {r: number, g: number, b: number} {
+	let r = 0, g = 0, b = 0;
+	if (hex.length === 4) {
+		r = parseInt(hex[1] + hex[1], 16);
+		g = parseInt(hex[2] + hex[2], 16);
+		b = parseInt(hex[3] + hex[3], 16);
+	} else {
+		r = parseInt(hex.slice(1, 3), 16);
+		g = parseInt(hex.slice(3, 5), 16);
+		b = parseInt(hex.slice(5, 7), 16);
+	}
+	return {r, g, b};
+}
+
+export function hue2rgb(p: number, q: number, t: number): number {
+	if(t < 0) t += 1;
+	if(t > 1) t -= 1;
+	if(t < 1 / 6) return p + (q - p) * 6 * t;
+	if(t < 1 / 2) return q;
+	if(t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
+	return p;
+}
+
+export function int2Hex(r: number, g: number, b: number) {
+	return '#' + dec2Hex(r) + dec2Hex(g) + dec2Hex(b);
+}
+
+/**
+ * Adjusts the darkness of a hex color.
+ * @param {string} hex - The hex color (e.g., '#ff0000').
+ * @param {number} amount - A value between -1 (black) and 1 (white)
+ */
+export function shadeColor(hex: string, amount: number) {
+	let {r, g, b} = hex2Int(hex);
+	r /= 255; g /= 255; b /= 255;
+	const max = Math.max(r, g, b), min = Math.min(r, g, b);
+	let h, s, l = (max + min) / 2;
+
+	if (max === min) {
+		h = s = 0;
+	} else {
+		const d = max - min;
+		s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
+		switch (max) {
+			case r: h = (g - b) / d + (g < b ? 6 : 0); break;
+			case g: h = (b - r) / d + 2; break;
+			case b: h = (r - g) / d + 4; break;
+			default: h = 0; break;
+		}
+		h /= 6;
+	}
+
+	// Adjust Lightness
+	l = Math.max(0, Math.min(1, l + amount));
+	const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+	const p = 2 * l - q;
+	return int2Hex(hue2rgb(p, q, h + 1/3), hue2rgb(p, q, h), hue2rgb(p, q, h - 1/3));
+};

src/csv.ts

@@ -14,41 +14,55 @@ import {LETTER_LIST} from './string.ts';
 export function fromCsv<T = any>(csv: string, hasHeaders = true): T[] {
 	function parseLine(line: string): (string | null)[] {
 		const columns: string[] = [];
-		let current = '', inQuotes = false;
+		let current = '', inQuotes = false, quoteChar: string | null = null;
 		for (let i = 0; i < line.length; i++) {
 			const char = line[i];
 			const nextChar = line[i + 1];
-			if (char === '"') {
-				if (inQuotes && nextChar === '"') {
-					current += '"'; // Handle escaped quotes
+			if ((char === '"' || char === "'") && !inQuotes) {
+				inQuotes = true;
+				quoteChar = char;
+			} else if (char === quoteChar && inQuotes) {
+				if (nextChar === quoteChar) {
+					current += quoteChar; // Handle escaped quotes
 					i++;
-				} else inQuotes = !inQuotes;
+				} else {
+					inQuotes = false;
+					quoteChar = null;
+				}
 			} else if (char === ',' && !inQuotes) {
-				columns.push(current.trim()); // Trim column values
+				columns.push(current.trim());
 				current = '';
 			} else current += char;
 		}
-		columns.push(current.trim()); // Trim last column value
-		return columns.map(col => col.replace(/^"|"$/g, '').replace(/""/g, '"'));
+		columns.push(current.trim());
+		return columns.map(col => {
+			// Remove surrounding quotes (both " and ')
+			col = col.replace(/^["']|["']$/g, '');
+			// Unescape doubled quotes
+			return col.replace(/""/g, '"').replace(/''/g, "'");
+		});
 	}
 
-	// Normalize line endings and split rows
 	const rows = [];
-	let currentRow = '', inQuotes = false;
-	for (const char of csv.replace(/\r\n/g, '\n')) { // Normalize \r\n to \n
-		if (char === '"') inQuotes = !inQuotes;
+	let currentRow = '', inQuotes = false, quoteChar: string | null = null;
+	for (const char of csv.replace(/\r\n/g, '\n')) {
+		if ((char === '"' || char === "'") && !inQuotes) {
+			inQuotes = true;
+			quoteChar = char;
+		} else if (char === quoteChar && inQuotes) {
+			inQuotes = false;
+			quoteChar = null;
+		}
 		if (char === '\n' && !inQuotes) {
-			rows.push(currentRow.trim()); // Trim row
+			rows.push(currentRow.trim());
 			currentRow = '';
 		} else currentRow += char;
 	}
-	if (currentRow) rows.push(currentRow.trim()); // Trim last row
+	if (currentRow) rows.push(currentRow.trim());
 
-	// Extract headers
 	let headers: any = hasHeaders ? rows.splice(0, 1)[0] : null;
 	if (headers) headers = headers.match(/(?:[^,"']+|"(?:[^"]|"")*"|'(?:[^']|'')*')+/g)?.map((h: any) => h.trim());
 
-	// Parse rows
 	return <T[]>rows.map(r => {
 		const props = parseLine(r);
 		const h = headers || (Array(props.length).fill(null).map((_, i) => {
@@ -65,7 +79,6 @@ export function fromCsv<T = any>(csv: string, hasHeaders = true): T[] {
 	});
 }
 
-
 /**
  * Convert an array of objects to a CSV string
  *

src/files.ts

@@ -83,6 +83,7 @@ export function timestampFilename(name?: string, date: Date | number | string =
 
 /**
  * Upload file to URL with progress callback using PromiseProgress
+ * Works in both browser (with progress) and Node.js (fallback without progress)
  *
  * @param {{url: string, files: File[], headers?: {[p: string]: string}, withCredentials?: boolean}} options
  * @return {PromiseProgress<T>} Promise of request with `onProgress` callback
@@ -93,19 +94,40 @@ export function uploadWithProgress<T>(options: {
 	headers?: {[key: string]: string};
 	withCredentials?: boolean;
 }): PromiseProgress<T> {
-	return new PromiseProgress<T>((res, rej, prog) => {
-		const xhr = new XMLHttpRequest();
-		const formData = new FormData();
-		options.files.forEach(f => formData.append('file', f));
+	// Browser environment - use XMLHttpRequest for progress
+	if (typeof XMLHttpRequest !== 'undefined') {
+		return new PromiseProgress<T>((res, rej, prog) => {
+			const xhr = new XMLHttpRequest();
+			const formData = new FormData();
+			options.files.forEach(f => formData.append('files', f));
 
-		xhr.withCredentials = !!options.withCredentials;
-		xhr.upload.addEventListener('progress', (event) => event.lengthComputable ? prog(event.loaded / event.total) : null);
-		xhr.addEventListener('loadend', () => res(<T>JSONAttemptParse(xhr.responseText)));
-		xhr.addEventListener('error', () => rej(JSONAttemptParse(xhr.responseText)));
-		xhr.addEventListener('timeout', () => rej({error: 'Request timed out'}));
+			xhr.withCredentials = !!options.withCredentials;
+			xhr.upload.addEventListener('progress', (event) => event.lengthComputable ? prog(event.loaded / event.total) : null);
+			xhr.addEventListener('loadend', () => res(<T>JSONAttemptParse(xhr.responseText)));
+			xhr.addEventListener('error', () => rej(JSONAttemptParse(xhr.responseText)));
+			xhr.addEventListener('timeout', () => rej({error: 'Request timed out'}));
 
-		xhr.open('POST', options.url);
-		Object.entries(options.headers || {}).forEach(([key, value]) => xhr.setRequestHeader(key, value));
-		xhr.send(formData);
+			xhr.open('POST', options.url);
+			Object.entries(options.headers || {}).forEach(([key, value]) => xhr.setRequestHeader(key, value));
+			xhr.send(formData);
+		});
+	}
+
+	// Node.js environment - fallback to fetch without progress
+	return new PromiseProgress<T>(async (res, rej) => {
+		try {
+			const formData = new FormData();
+			options.files.forEach(f => formData.append('files', f));
+			const response = await fetch(options.url, {method: 'POST', headers: options.headers || {}, body: formData});
+			if(!response.ok) {
+				const error = await response.text();
+				rej(JSONAttemptParse(error));
+			} else {
+				const result = await response.text();
+				res(<T>JSONAttemptParse(result));
+			}
+		} catch (error) {
+			rej(error);
+		}
 	});
 }

src/html.ts

@@ -0,0 +1,65 @@
+/**
+ * Decode HTML escaped characters
+ * @param html HTML to clean up
+ * @returns {any}
+ */
+export function decodeHtml(html: string) {
+	return html
+		.replace(/ /g, '\u00A0')
+		.replace(/"/g, '"')
+		.replace(/'/g, "'")
+		.replace(/&lt;/g, '<')
+		.replace(/&gt;/g, '>')
+		.replace(/&cent;/g, '¢')
+		.replace(/&pound;/g, '£')
+		.replace(/&yen;/g, '¥')
+		.replace(/&euro;/g, '€')
+		.replace(/&copy;/g, '©')
+		.replace(/&reg;/g, '®')
+		.replace(/&trade;/g, '™')
+		.replace(/&times;/g, '×')
+		.replace(/&divide;/g, '÷')
+		.replace(/&#(\d+);/g, (match, dec) => String.fromCharCode(dec))
+		.replace(/&#x([0-9a-fA-F]+);/g, (match, hex) => String.fromCharCode(parseInt(hex, 16)))
+		.replace(/&amp;/g, '&'); // Always last!
+}
+
+/**
+ * Parse markdown headers
+ *
+ * **NOTE: frontmatter parsing only works 2 layers deep**
+ *
+ * @param {string} content
+ * @returns {{meta: any, content: string} | {meta: {}, content: string}}
+ */
+export function parseMarkdown(content: string) {
+	const match = content.match(/^---\n([\s\S]*?)\n---\n([\s\S]*)$/);
+	if (!match) return {meta: {}, content};
+
+	const meta: any = {};
+	let currentParent: string | null = null;
+
+	for (const rawLine of match[1].split('\n')) {
+		if (!rawLine.trim()) continue;
+		const indented = /^\s+/.test(rawLine);
+		const line = rawLine.trim();
+		const colonIdx = line.indexOf(':');
+		if (colonIdx === -1) continue;
+
+		const key = line.slice(0, colonIdx).trim();
+		const value = line.slice(colonIdx + 1).trim();
+
+		let parsed: any = value;
+		try { parsed = JSON.parse(value); } catch {}
+
+		if (!indented) {
+			currentParent = value === '' ? key : null;
+			if (value === '') meta[key] = {};
+			else meta[key] = parsed;
+		} else if (currentParent) {
+			meta[currentParent][key] = parsed;
+		}
+	}
+
+	return {meta, content: match[2].trim()};
+}

src/index.ts

@@ -1,3 +1,5 @@
+export * from 'var-persist';
+
 export * from './arg-parser';
 export * from './array';
 export * from './aset';
@@ -5,9 +7,10 @@ export * from './cache';
 export * from './color';
 export * from './csv';
 export * from './database';
-export * from './files';
 export * from './emitter';
 export * from './errors';
+export * from './files';
+export * from './html';
 export * from './http';
 export * from './json';
 export * from './jwt';
@@ -23,4 +26,4 @@ export * from './template';
 export * from './time';
 export * from './tts';
 export * from './types';
-export * from 'var-persist';
+export * from './xml';

src/math.ts

@@ -30,6 +30,10 @@ export function dec2Frac(num: number, maxDen=1000): string {
 		(numerator ? numerator + '/' + closest.d : '');
 }
 
+export function dec2Hex(num: number): string {
+	const hex = Math.round(num * 255).toString(16);
+	return hex.length === 1 ? '0' + hex : hex;
+}
 
 /**
  * Convert fraction to decimal number
@@ -42,7 +46,7 @@ export function dec2Frac(num: number, maxDen=1000): string {
  * @param {string} frac Fraction to convert
  * @return {number} Faction as a decimal
  */
-export function fracToDec(frac: string) {
+export function frac2Dec(frac: string) {
 	let split = frac.split(' ');
 	const whole = split.length == 2 ? Number(split[0]) : 0;
 	split = (<string>split.pop()).split('/');

src/path-events.ts

@@ -76,8 +76,18 @@ export class PathEvent {
 	/** Whether this path contains glob patterns */
 	hasGlob!: boolean;
 
-	/** Internal cache for PathEvent instances to avoid redundant parsing */
-	private static pathEventCache: Map<string, PathEvent> = new Map();
+	/** Internal cache for parsed path data (plain objects, not instances) */
+	private static pathEventCache: Map<string, {
+		module: string;
+		fullPath: string;
+		dir: string;
+		path: string;
+		name: string;
+		methods: Method[];
+		hasGlob: boolean;
+	}> = new Map();
+	/** Max size for path cache before LRU eviction */
+	private static readonly MAX_PATH_CACHE_SIZE = 1000;
 	/** Cache for compiled permissions (path + required permissions → result) */
 	private static permissionCache: Map<string, PathEvent> = new Map();
 	/** Max size for permission cache before LRU eviction */
@@ -111,8 +121,20 @@ export class PathEvent {
 			return;
 		}
 
+		// Check cache and reconstruct from plain object
 		if(PathEvent.pathEventCache.has(e)) {
-			Object.assign(this, PathEvent.pathEventCache.get(e)!);
+			const cached = PathEvent.pathEventCache.get(e)!;
+			// Move to end (LRU - most recently used)
+			PathEvent.pathEventCache.delete(e);
+			PathEvent.pathEventCache.set(e, cached);
+
+			this.module = cached.module;
+			this.fullPath = cached.fullPath;
+			this.dir = cached.dir;
+			this.path = cached.path;
+			this.name = cached.name;
+			this.methods = new ASet(cached.methods);
+			this.hasGlob = cached.hasGlob;
 			return;
 		}
 
@@ -128,19 +150,49 @@ export class PathEvent {
 			this.name = '';
 			this.methods = new ASet<Method>(p === '*' ? ['*'] : <any>method.split(''));
 			this.hasGlob = true;
-			PathEvent.pathEventCache.set(e, this);
+
+			// LRU eviction
+			if(PathEvent.pathEventCache.size >= PathEvent.MAX_PATH_CACHE_SIZE) {
+				const firstKey = PathEvent.pathEventCache.keys().next().value;
+				if(firstKey) PathEvent.pathEventCache.delete(firstKey);
+			}
+
+			PathEvent.pathEventCache.set(e, {
+				module: this.module,
+				fullPath: this.fullPath,
+				dir: this.dir,
+				path: this.path,
+				name: this.name,
+				methods: [...this.methods],
+				hasGlob: this.hasGlob
+			});
 			return;
 		}
 
 		let temp = p.split('/').filter(p => !!p);
 		this.module = temp.splice(0, 1)[0] || '';
 		this.path = temp.join('/');
-		this.dir = temp.length > 2 ? temp.slice(0, -1).join('/') : '';
+		this.dir = temp.length > 1 ? temp.slice(0, -1).join('/') : '';
 		this.fullPath = `${this.module}${this.module && this.path ? '/' : ''}${this.path}`;
 		this.name = temp.pop() || '';
 		this.hasGlob = this.fullPath.includes('*');
 		this.methods = new ASet(<any>method.split(''));
-		PathEvent.pathEventCache.set(e, this);
+
+		// LRU eviction
+		if(PathEvent.pathEventCache.size >= PathEvent.MAX_PATH_CACHE_SIZE) {
+			const firstKey = PathEvent.pathEventCache.keys().next().value;
+			if(firstKey) PathEvent.pathEventCache.delete(firstKey);
+		}
+
+		PathEvent.pathEventCache.set(e, {
+			module: this.module,
+			fullPath: this.fullPath,
+			dir: this.dir,
+			path: this.path,
+			name: this.name,
+			methods: [...this.methods],
+			hasGlob: this.hasGlob
+		});
 	}
 
 	/**

src/search.ts

@@ -1,44 +1,122 @@
 import {JSONAttemptParse, JSONSerialize} from './json.ts';
 import {dotNotation} from './objects.ts';
 
-/**
- * Filters an array of objects based on a search term and optional regex checking.
- *
- * @param {Array} rows Array of objects to filter
- * @param {string} search The logic string or regext to filter on
- * @param {boolean} [regex=false] Treat search expression as regex
- * @param {Function} [transform=(r) => r] - Transform rows before filtering
- * @return {Array} The filtered array of objects that matched search
- */
-export function search(rows: any[], search: string, regex?: boolean, transform: Function = (r: any) => r) {
-	if(!rows) return [];
-	return rows.filter(r => {
-		// Empty search
-		if(!search) return true;
-		const value = transform(r);
-		// Regex search
-		if(regex) {
-			return !!Object.values(value).filter((v: any) => {
-				try { return RegExp(search, 'gm').test(v.toString()); }
-				catch { return false; }
-			}).length
-		} else {
-			return logicTest(value, search);
-		}
-	});
+const VALID_FLAGS = new Set([...'dgimsuvy']);
+
+function toRegex(pattern: string, defaultFlags = 'gm'): RegExp | null {
+	const lit = /^\/(.+)\/([a-zA-Z]*)$/.exec(pattern);
+	try { return lit ? new RegExp(lit[1], lit[2]) : new RegExp(pattern, defaultFlags); }
+	catch { return null; }
 }
 
 /**
- * Test an object against a logic condition. By default values are checked
- * @param {string} condition
- * @param {object} target
- * @return {boolean}
+ * Filters an array of objects based on a query string.
+ *
+ * Supports plain text, regex, boolean/logical operators, and dataset helpers.
+ *
+ * **Examples**
+ * ```js
+ * search(rows: T[], 'alice'): T[] // Case-Insensitive
+ * search(rows: T[], 'Alice'): T[] // Case-Sensitive
+ *
+ * search(rows: T[], 'name = Alice'): T[] // loose equality
+ * search(rows: T[], 'name != Alice'): T[] // loose inequality
+ * search(rows: T[], 'role += admin'): T[] // Contains
+ * search(rows: T[], 'status -= archived'): T[] // Not Contain
+ * search(rows: T[], 'age > 18'): T[] // Greater Than
+ * search(rows: T[], 'age >= 18'): T[] // Greater Than or Equal
+ * search(rows: T[], 'age < 18'): T[] // Less Than
+ * search(rows: T[], 'age <= 18'): T[] // Less Than or Equal
+ *
+ * search(rows: T[], '/^alice/gi'): T[] // Global Regex
+ * search(rows: T[], 'name =~ ^Al'): T[] // Regex Match (shorthand)
+ * search(rows: T[], 'name =~ /^al/i'): T[] // Regex Match (with flags)
+ * search(rows: T[], 'email !~ /@test\.com$/i'): T[] // Regex Not Match
+ *
+ * search(rows: T[], 'unique(email)'): T[] // Unique property values
+ * search(rows: T[], 'duplicate(email)'): T[] // Duplicate property values
+ * search(rows: T[], 'distinct(type)'): T[] // Distinct property values
+ *
+ * search(rows: T[], 'active && role != admin'): T[] // ANDs
+ * search(rows: T[], 'email != null || distinct(email)'): T[] // ORs
+ * ```
+ *
+ * @param rows - Array of objects to filter
+ * @param query - Query string; see supported syntax above
+ * @param transform - Optional transform applied to each row before matching
+ * @returns The filtered array of rows
+ */
+export function search(rows: any[], query: string, transform: (r: any) => any = r => r): any[] {
+	if (!rows || !query?.trim()) return rows ?? [];
+
+	const q = query.trim();
+
+	// Global regex: /pattern/flags — strict, whole string, at least one valid flag
+	const globalRegex = /^\/(.+)\/([a-zA-Z]+)$/.exec(q);
+	if (globalRegex && [...globalRegex[2]].every(f => VALID_FLAGS.has(f))) {
+		const re = toRegex(q);
+		return rows.filter(r => re && Object.values(transform(r)).some((v: any) => {
+			try { return re.test(v?.toString() ?? ''); } catch { return false; }
+		}));
+	}
+
+	// Split top-level && into predicates and dataset helpers
+	const parts = q.split('&&').map(p => p.trim());
+	const helpers = parts.filter(p => /^(unique|duplicate|distinct)\(\w+\)$/.test(p));
+	const predicate = parts.filter(p => !helpers.includes(p)).join(' && ');
+
+	let filtered = predicate
+		? rows.filter(r => logicTest(transform(r), predicate))
+		: [...rows];
+
+	for (const h of helpers) {
+		const [, fn, field] = /^(\w+)\((\w+)\)$/.exec(h)!;
+		if (fn === 'distinct') continue; // run last
+		const freq = new Map<any, number>();
+		filtered.forEach(r => { const v = dotNotation(transform(r), field); freq.set(v, (freq.get(v) ?? 0) + 1); });
+		filtered = filtered.filter(r => fn === 'unique' ? freq.get(dotNotation(transform(r), field)) === 1 : (freq.get(dotNotation(transform(r), field)) ?? 0) > 1);
+	}
+
+	for (const h of helpers.filter(h => h.startsWith('distinct'))) {
+		const field = /\((\w+)\)/.exec(h)![1];
+		const seen = new Set();
+		filtered = filtered.filter(r => { const v = dotNotation(transform(r), field); return seen.has(v) ? false : !!seen.add(v); });
+	}
+
+	return filtered;
+}
+
+/**
+ * Tests object against a logic string.
+ *
+ * **Property operators**
+ * ```
+ * 'alice'                    // case-insensitive
+ * 'Alice'                    // case-sensitive
+ * 'name = Alice'             // loose equality (==)
+ * 'name == Alice'            // loose equality
+ * 'name != Alice'            // loose inequality
+ * 'role += admin'            // field contains value
+ * 'status -= archived'       // field does not contain value
+ * 'age > 21'                 // greater than
+ * 'age >= 21'                // greater than or equal
+ * 'age < 21'                 // less than
+ * 'age <= 21'                // less than or equal
+ * 'name =~ ^Al'              // regex match (shorthand)
+ * 'name =~ /^al/i'           // regex match (with flags)
+ * 'email !~ /@test\.com$/i'  // regex not match
+ * 'status = active && role != admin'    // ANDs
+ * 'status = active || status = pending' // ORs
+ * ```
+ *
+ * @param target - The object to test
+ * @param condition - The condition string; see supported syntax above
+ * @returns Whether the object satisfies the condition
  */
 export function logicTest(target: object, condition: string): boolean {
 	const evalBoolean = (a: any, op: string, b: any): boolean => {
-		switch(op) {
-			case '=':
-			case '==': return a == b;
+		switch (op) {
+			case '=': case '==': return a == b;
 			case '!=': return a != b;
 			case '+=': return a?.toString().includes(b);
 			case '-=': return !a?.toString().includes(b);
@@ -46,26 +124,23 @@ export function logicTest(target: object, condition: string): boolean {
 			case '>=': return a >= b;
 			case '<': return a < b;
 			case '<=': return a <= b;
+			case '~=': try { return !!toRegex(b)?.test(a?.toString() ?? ''); } catch { return false; }
+			case '!~': try { return !toRegex(b)?.test(a?.toString() ?? ''); } catch { return false; }
 			default: return false;
 		}
-	}
+	};
 
-	const or = condition.split('||').map(p => p.trim()).filter(p => !!p);
-	return -1 != or.findIndex(p => {
-		// Make sure all ANDs pass
-		const and = p.split('&&').map(p => p.trim()).filter(p => !!p);
-		return and.filter(p => {
-			// Boolean operator
-			const prop = /(\S+)\s*(==?|!=|\+=|-=|>=|>|<=|<)\s*(\S+)/g.exec(p);
-			if(prop) {
-				const key = Object.keys(target).find(k => k.toLowerCase() == prop[1].toLowerCase());
-				return evalBoolean(dotNotation<any>(target, key || prop[1]),  prop[2], JSONAttemptParse(prop[3]));
-			}
-			// Case-sensitive
-			const v = Object.values(target).map(JSONSerialize).join('');
-			if(/[A-Z]/g.test(condition)) return v.includes(p);
-			// Case-insensitive
-			return v.toLowerCase().includes(p);
-		}).length == and.length;
-	});
+	const resolve = (key: string) => dotNotation<any>(target, Object.keys(target).find(k => k.toLowerCase() === key.toLowerCase()) ?? key);
+
+	const evalExpr = (expr: string): boolean => {
+		const e = expr.trim();
+		const prop = /^(\S+)\s*(==?|!=|~=|!~|\+=|-=|>=|>|<=|<)\s*(.+)$/.exec(e);
+		if (prop) return evalBoolean(resolve(prop[1]), prop[2], JSONAttemptParse(prop[3].trim()));
+		const v = Object.values(target).map(JSONSerialize).join('');
+		return /[A-Z]/.test(e) ? v.includes(e) : v.toLowerCase().includes(e.toLowerCase());
+	};
+
+	return condition.split('||').map(p => p.trim()).filter(Boolean).some(group =>
+		group.split('&&').map(p => p.trim()).filter(Boolean).every(evalExpr)
+	);
 }

src/string.ts

@@ -27,7 +27,6 @@ export function camelCase(str?: string): string {
 	return pascal.charAt(0).toLowerCase() + pascal.slice(1);
 }
 
-
 /**
  * Convert number of bytes into a human-readable size
  *
@@ -100,7 +99,6 @@ export function kebabCase(str?: string): string {
 	return wordSegments(str).map(w => w.toLowerCase()).join("-");
 }
 
-
 /**
  * Add padding to string
  *
@@ -216,7 +214,6 @@ export function snakeCase(str?: string): string {
 	return wordSegments(str).map(w => w.toLowerCase()).join("_");
 }
 
-
 /**
  * Splice a string together (Similar to Array.splice)
  *
@@ -232,6 +229,16 @@ export function strSplice(str: string, start: number, deleteCount: number, inser
 	return before + insert + after;
 }
 
+/**
+ * Converts text to Title Case
+ */
+export function titleCase(str?: string): string {
+	if(!str) return '';
+	return wordSegments(str)
+		.map(w => w.charAt(0).toUpperCase() + w.slice(1).toLowerCase())
+		.join(' ');
+}
+
 /**
  * Find all substrings that match a given pattern.
  *
@@ -242,19 +249,16 @@ export function strSplice(str: string, start: number, deleteCount: number, inser
  * @return {RegExpExecArray[]} Found matches.
  */
 export function matchAll(value: string, regex: RegExp | string): RegExpExecArray[] {
-	if(typeof regex === 'string') {
-		regex = new RegExp(regex, 'g');
-	}
-
-	// https://stackoverflow.com/a/60290199
-	if(!regex.global) {
-		throw new TypeError('Regular expression must be global.');
-	}
+	if(typeof regex === 'string') regex = new RegExp(regex, 'g');
+	if(!regex.global) throw new TypeError('Regular expression must be global.');
 
 	let ret: RegExpExecArray[] = [];
 	let match: RegExpExecArray | null;
 	while((match = regex.exec(value)) !== null) {
 		ret.push(match);
+		if(match[0].length === 0) {
+			regex.lastIndex++;
+		}
 	}
 
 	return ret;

src/template.ts

@@ -8,7 +8,16 @@ export class TemplateError extends BadRequestError { }
 export function findTemplateVars(html: string): Record<string, any> {
 	const variables = new Set<string>();
 	const arrays = new Set<string>();
-	const excluded = new Set<string>(['true', 'false', 'null', 'undefined']);
+	const excluded = new Set([
+		'let', 'const', 'var', 'function', 'if', 'while', 'do', 'this', 'typeof',
+		'new', 'instanceof', 'in', 'for', 'else', 'case', 'break', 'continue',
+		'switch', 'default', 'with', 'eval', 'arguments', 'void', 'delete', 'null',
+		'undefined', 'true', 'false', 'async', 'await', 'try', 'catch', 'finally',
+		'throw', 'return', 'yield', 'debugger', 'extends', 'import', 'export',
+		'class', 'super', 'static', 'get', 'set', 'constructor', 'enum', 'implements',
+		'interface', 'package', 'private', 'protected', 'public', 'abstract', 'final',
+		'native', 'synchronized', 'throws', 'transient', 'volatile'
+	]);
 
 	// Extract & exclude loop variables, mark arrays
 	for (const loop of matchAll(html, /\{\{\s*?\*\s*?(.+?)\s+in\s+(.+?)\s*?}}/g)) {
@@ -70,6 +79,7 @@ export function findTemplateVars(html: string): Record<string, any> {
 	}
 	return result;
 }
+
 export async function renderTemplate(template: string, data: any, fetch?: (file: string) => Promise<string>) {
 	if(!fetch) fetch = (file) => { throw new TemplateError(`Unable to fetch template: ${file}`); }
 

src/time.ts

@@ -78,19 +78,62 @@ export function dayOfYear(date: Date): number {
  *
  * @param {string} format How date string will be formatted, default: `YYYY-MM-DD H:mm A`
  * @param {Date | number | string} date Date or timestamp, defaults to now
- * @param tz Set timezone offset
+ * @param tz Set timezone offset in: hours (-4) or minutes (430) or IANA string (America/New_York)
  * @return {string} Formated date
  */
 export function formatDate(format: string = 'YYYY-MM-DD H:mm', date: Date | number | string = new Date(), tz: string | number = 'local'): string {
 	if (typeof date === 'number' || typeof date === 'string') date = new Date(date);
 	if (isNaN(date.getTime())) throw new Error('Invalid date input');
-	const numericTz = typeof tz === 'number';
-	const localTz = tz === 'local' || (!numericTz && tz.toLowerCase?.() === 'local');
-	const tzName = localTz ? Intl.DateTimeFormat().resolvedOptions().timeZone : numericTz ? 'UTC' : tz;
+
+	const TIMEZONE_MAP = [
+		{ name: 'IDLW', iana: 'Etc/GMT+12', offset: -720 },
+		{ name: 'SST', iana: 'Pacific/Pago_Pago', offset: -660 },
+		{ name: 'HST', iana: 'Pacific/Honolulu', offset: -600 },
+		{ name: 'AKST', iana: 'America/Anchorage', offset: -540 },
+		{ name: 'PST', iana: 'America/Los_Angeles', offset: -480 },
+		{ name: 'MST', iana: 'America/Denver', offset: -420 },
+		{ name: 'CST', iana: 'America/Chicago', offset: -360 },
+		{ name: 'EST', iana: 'America/New_York', offset: -300 },
+		{ name: 'AST', iana: 'America/Halifax', offset: -240 },
+		{ name: 'BRT', iana: 'America/Sao_Paulo', offset: -180 },
+		{ name: 'MAT', iana: 'Atlantic/South_Georgia', offset: -120 },
+		{ name: 'AZOT', iana: 'Atlantic/Azores', offset: -60 },
+		{ name: 'UTC', iana: 'UTC', offset: 0 },
+		{ name: 'CET', iana: 'Europe/Paris', offset: 60 },
+		{ name: 'EET', iana: 'Europe/Athens', offset: 120 },
+		{ name: 'MSK', iana: 'Europe/Moscow', offset: 180 },
+		{ name: 'GST', iana: 'Asia/Dubai', offset: 240 },
+		{ name: 'PKT', iana: 'Asia/Karachi', offset: 300 },
+		{ name: 'IST', iana: 'Asia/Kolkata', offset: 330 },
+		{ name: 'BST', iana: 'Asia/Dhaka', offset: 360 },
+		{ name: 'ICT', iana: 'Asia/Bangkok', offset: 420 },
+		{ name: 'CST', iana: 'Asia/Shanghai', offset: 480 },
+		{ name: 'JST', iana: 'Asia/Tokyo', offset: 540 },
+		{ name: 'AEST', iana: 'Australia/Sydney', offset: 600 },
+		{ name: 'SBT', iana: 'Pacific/Guadalcanal', offset: 660 },
+		{ name: 'TOT', iana: 'Pacific/Tongatapu', offset: 780 },
+		{ name: 'LINT', iana: 'Pacific/Kiritimati', offset: 840 },
+	];
+
+	let numericTz = typeof tz === 'number';
+	const localTz = tz === 'local' || (!numericTz && tz.toString().toLowerCase?.() === 'local');
+	let tzName = localTz ? Intl.DateTimeFormat().resolvedOptions().timeZone : numericTz ? 'UTC' : tz;
+	let offsetMinutes = 0;
+
+	if (numericTz) {
+		// Convert hours to minutes if offset is small (likely hours)
+		offsetMinutes = Math.abs(tz as number) < 24 ? (tz as number) * 60 : (tz as number);
+
+		// Find closest matching timezone
+		const closest = TIMEZONE_MAP.reduce((prev, curr) =>
+			Math.abs(curr.offset - offsetMinutes) < Math.abs(prev.offset - offsetMinutes) ? curr : prev
+		);
+		tzName = closest.iana;
+	}
 
 	if (!numericTz && tzName !== 'UTC') {
 		try {
-			new Intl.DateTimeFormat('en-US', { timeZone: tzName }).format();
+			new Intl.DateTimeFormat('en-US', { timeZone: <string>tzName }).format();
 		} catch {
 			throw new Error(`Invalid timezone: ${tzName}`);
 		}
@@ -99,9 +142,10 @@ export function formatDate(format: string = 'YYYY-MM-DD H:mm', date: Date | numb
 	let zonedDate = new Date(date);
 	let get: (fn: 'FullYear' | 'Month' | 'Date' | 'Day' | 'Hours' | 'Minutes' | 'Seconds' | 'Milliseconds') => number;
 	const partsMap: Record<string, string> = {};
+
 	if (!numericTz && tzName !== 'UTC') {
 		const parts = new Intl.DateTimeFormat('en-US', {
-			timeZone: tzName,
+			timeZone: <string>tzName,
 			year: 'numeric', month: '2-digit', day: '2-digit', weekday: 'long',
 			hour: '2-digit', minute: '2-digit', second: '2-digit',
 			hour12: false
@@ -111,7 +155,7 @@ export function formatDate(format: string = 'YYYY-MM-DD H:mm', date: Date | numb
 		});
 
 		const monthValue = parseInt(partsMap.month) - 1;
-		const dayOfWeekValue = new Date(`${partsMap.year}-${partsMap.month}-${partsMap.day}`).getDay();
+		const dayOfWeekValue = new Date(Date.UTC(parseInt(partsMap.year), parseInt(partsMap.month) - 1, parseInt(partsMap.day))).getUTCDay();
 		const hourValue = parseInt(partsMap.hour);
 
 		get = (fn: 'FullYear' | 'Month' | 'Date' | 'Day' | 'Hours' | 'Minutes' | 'Seconds' | 'Milliseconds'): number => {
@@ -127,8 +171,7 @@ export function formatDate(format: string = 'YYYY-MM-DD H:mm', date: Date | numb
 			}
 		};
 	} else {
-		const offset = numericTz ? tz as number : 0;
-		zonedDate = new Date(date.getTime() + offset * 60 * 60 * 1000);
+		zonedDate = new Date(date.getTime() + offsetMinutes * 60 * 1000);
 		get = (fn: 'FullYear' | 'Month' | 'Date' | 'Day' | 'Hours' | 'Minutes' | 'Seconds' | 'Milliseconds'): number => zonedDate[`getUTC${fn}`]();
 	}
 
@@ -139,14 +182,13 @@ export function formatDate(format: string = 'YYYY-MM-DD H:mm', date: Date | numb
 	}
 
 	function getTZOffset(): string {
-		if (numericTz) {
-			const total = (tz as number) * 60;
-			const hours = Math.floor(Math.abs(total) / 60);
-			const mins = Math.abs(total) % 60;
-			return `${tz >= 0 ? '+' : '-'}${String(hours).padStart(2, '0')}:${String(mins).padStart(2, '0')}`;
+		if(numericTz) {
+			const hours = Math.floor(Math.abs(offsetMinutes) / 60);
+			const mins = Math.abs(offsetMinutes) % 60;
+			return `${offsetMinutes >= 0 ? '+' : '-'}${String(hours).padStart(2, '0')}:${String(mins).padStart(2, '0')}`;
 		}
 		try {
-			const offset = new Intl.DateTimeFormat('en-US', {timeZone: tzName, timeZoneName: 'longOffset', hour: '2-digit', minute: '2-digit',})
+			const offset = new Intl.DateTimeFormat('en-US', {timeZone: <string>tzName, timeZoneName: 'longOffset', hour: '2-digit', minute: '2-digit',})
 				.formatToParts(<Date>date).find(p => p.type === 'timeZoneName')?.value.match(/([+-]\d{2}:\d{2})/)?.[1];
 			if (offset) return offset;
 		} catch {}
@@ -154,12 +196,11 @@ export function formatDate(format: string = 'YYYY-MM-DD H:mm', date: Date | numb
 	}
 
 	function getTZAbbr(): string {
-		if (numericTz && tz === 0) return 'UTC';
 		try {
-			return new Intl.DateTimeFormat('en-US', { timeZone: tzName, timeZoneName: 'short' })
+			return new Intl.DateTimeFormat('en-US', { timeZone: <string>tzName, timeZoneName: 'short' })
 				.formatToParts(<Date>date).find(p => p.type === 'timeZoneName')?.value || '';
 		} catch {
-			return tzName;
+			return <string>tzName;
 		}
 	}
 

src/xml.ts

@@ -0,0 +1,199 @@
+/**
+ * Parses an XML string into a structured JavaScript object.
+ * @param {string} xml - The XML string to parse
+ * @returns {Object} An object with `tag`, `attributes`, and `children` properties
+ */
+/**
+ * Parses an XML string into a structured JavaScript object (fast-xml-parser format).
+ * @param {string} xml - The XML string to parse
+ * @returns {Object} An object with tag names as keys and text content or nested objects as values
+ */
+export function fromXml(xml: string) {
+	xml = xml.trim();
+	let pos = 0;
+
+	function parseNode(): any {
+		skipWhitespace();
+		if(xml[pos] !== '<') return parseText();
+		pos++; // skip <
+
+		if(xml[pos] === '?') {
+			const declaration = parseDeclaration();
+			return { ['?' + declaration]: '', ...parseNode() };
+		}
+
+		if(xml[pos] === '!') {
+			parseComment();
+			return parseNode();
+		}
+
+		const tagName = parseTagName();
+		const attributes = parseAttributes();
+		skipWhitespace();
+
+		if(xml[pos] === '/' && xml[pos + 1] === '>') {
+			pos += 2; // skip />
+			return { [tagName]: '' };
+		}
+
+		pos++; // skip >
+		const children: any[] = [];
+		let textContent = '';
+
+		while(pos < xml.length) {
+			skipWhitespace();
+			if(xml[pos] === '<' && xml[pos + 1] === '/') {
+				pos += 2; // skip </
+				parseTagName(); // skip closing tag name
+				skipWhitespace();
+				pos++; // skip >
+				break;
+			}
+			const startPos = pos;
+			const child = parseNode();
+			if(typeof child === 'string') {
+				textContent += child;
+			} else if(child) {
+				children.push(child);
+			}
+		}
+
+		// If only text content, return simple value
+		if(children.length === 0 && textContent) {
+			const value = isNumeric(textContent) ? Number(textContent) : textContent;
+			return { [tagName]: value };
+		}
+
+		// If only text with no children
+		if(children.length === 0) {
+			return { [tagName]: '' };
+		}
+
+		// Merge children into object
+		const result: any = {};
+		for(const child of children) {
+			for(const [key, value] of Object.entries(child)) {
+				if(result[key]) {
+					// Convert to array if duplicate tags
+					if(!Array.isArray(result[key])) {
+						result[key] = [result[key]];
+					}
+					result[key].push(value);
+				} else {
+					result[key] = value;
+				}
+			}
+		}
+
+		return { [tagName]: result };
+	}
+
+	function parseTagName() {
+		let name = '';
+		while (pos < xml.length && /[a-zA-Z0-9_:-]/.test(xml[pos])) name += xml[pos++];
+		return name;
+	}
+
+	function parseAttributes() {
+		const attrs: any = {};
+		while (pos < xml.length) {
+			skipWhitespace();
+			if (xml[pos] === '>' || xml[pos] === '/') break;
+			const name = parseTagName();
+			skipWhitespace();
+			if (xml[pos] === '=') {
+				pos++;
+				skipWhitespace();
+				const quote = xml[pos++];
+				let value = '';
+				while (xml[pos] !== quote) value += xml[pos++];
+				pos++; // skip closing quote
+				attrs[name] = escapeXml(value, true);
+			}
+		}
+		return attrs;
+	}
+
+	function parseText() {
+		let text = '';
+		while (pos < xml.length && xml[pos] !== '<') text += xml[pos++];
+		text = text.trim();
+		return text ? escapeXml(text, true) : null;
+	}
+
+	function parseDeclaration() {
+		pos++; // skip ?
+		let name = '';
+		while (pos < xml.length && xml[pos] !== ' ' && xml[pos] !== '?') {
+			name += xml[pos++];
+		}
+		while (xml[pos] !== '>') pos++;
+		pos++;
+		return name;
+	}
+
+	function parseComment() {
+		while (!(xml[pos] === '-' && xml[pos + 1] === '-' && xml[pos + 2] === '>')) pos++;
+		pos += 3;
+	}
+
+	function skipWhitespace() {
+		while (pos < xml.length && /\s/.test(xml[pos])) pos++;
+	}
+
+	function isNumeric(str: string) {
+		return !isNaN(Number(str)) && !isNaN(parseFloat(str)) && str.trim() !== '';
+	}
+
+	return parseNode();
+}
+
+/**
+ * Converts a JavaScript object into an XML string.
+ * @param {Object} obj - Object with `tag`, `attributes`, and `children` properties, or a string
+ * @param {string} indent - Current indentation level (used internally for formatting)
+ * @returns {string} The formatted XML string
+ */
+export function toXml(obj: any, indent = '') {
+	if(typeof obj === 'string') return escapeXml(obj);
+	const { tag, attributes = {}, children = [] } = obj;
+	let xml = `${indent}<${tag}`;
+	for (const [key, value] of Object.entries(attributes))
+		xml += ` ${key}="${escapeXml(<any>value)}"`;
+	if (children.length === 0) {
+		xml += ' />';
+		return xml;
+	}
+	xml += '>';
+	const hasComplexChildren = children.some((c: any) => typeof c === 'object');
+	for (const child of children) {
+		if (hasComplexChildren) xml += '\n';
+		xml += toXml(child, hasComplexChildren ? indent + '  ' : '');
+	}
+	if(hasComplexChildren) xml += `\n${indent}`;
+	xml += `</${tag}>`;
+	return xml;
+}
+
+/**
+ * Escapes or unescapes XML special characters.
+ * @param {string} str - The string to process
+ * @param {boolean} decode - If true, decodes XML entities; if false, encodes special characters
+ * @returns {string} The processed string
+ */
+export function escapeXml(str: string, decode = false) {
+	if(decode) {
+		return str
+			.replace(/&lt;/g, '<')
+			.replace(/&gt;/g, '>')
+			.replace(/&quot;/g, '"')
+			.replace(/&apos;/g, "'")
+			.replace(/&amp;/g, '&');
+	}
+	return str
+		.replace(/&/g, '&amp;')
+		.replace(/</g, '&lt;')
+		.replace(/>/g, '&gt;')
+		.replace(/"/g, '&quot;')
+		.replace(/'/g, '&apos;');
+}

tests/math.spec.ts

@@ -1,4 +1,4 @@
-import { dec2Frac, fracToDec } from '../src';
+import { dec2Frac, frac2Dec } from '../src';
 
 describe('Math Utilities', () => {
 	describe('dec2Frac', () => {
@@ -27,25 +27,25 @@ describe('Math Utilities', () => {
 
 	describe('fracToDec', () => {
 		it('should convert mixed fraction to decimal', () => {
-			expect(fracToDec('1 1/4')).toBeCloseTo(1.25);
-			expect(fracToDec('2 1/2')).toBeCloseTo(2.5);
-			expect(fracToDec('3 3/4')).toBeCloseTo(3.75);
+			expect(frac2Dec('1 1/4')).toBeCloseTo(1.25);
+			expect(frac2Dec('2 1/2')).toBeCloseTo(2.5);
+			expect(frac2Dec('3 3/4')).toBeCloseTo(3.75);
 		});
 
 		it('should convert fraction without whole part to decimal', () => {
-			expect(fracToDec('3/4')).toBeCloseTo(0.75);
-			expect(fracToDec('1/2')).toBeCloseTo(0.5);
-			expect(fracToDec('1/10')).toBeCloseTo(0.1);
+			expect(frac2Dec('3/4')).toBeCloseTo(0.75);
+			expect(frac2Dec('1/2')).toBeCloseTo(0.5);
+			expect(frac2Dec('1/10')).toBeCloseTo(0.1);
 		});
 
 		it('should convert whole number fraction', () => {
-			expect(fracToDec('4 0/1')).toBeCloseTo(4);
-			expect(fracToDec('0/1')).toBeCloseTo(0);
+			expect(frac2Dec('4 0/1')).toBeCloseTo(4);
+			expect(frac2Dec('0/1')).toBeCloseTo(0);
 		});
 
 		it('should handle zero correctly', () => {
-			expect(fracToDec('0/1')).toBeCloseTo(0);
-			expect(fracToDec('0 0/1')).toBeCloseTo(0);
+			expect(frac2Dec('0/1')).toBeCloseTo(0);
+			expect(frac2Dec('0 0/1')).toBeCloseTo(0);
 		});
 	});
 });

tests/search.spec.ts

@@ -17,55 +17,130 @@ describe('Search Utilities', () => {
 			expect(search(rows, '')).toEqual(rows);
 		});
 
-		it('filters based on a simple property string', () => {
-			expect(search(rows, 'Alice')).toEqual([rows[0]]);
-		});
-
-		it('filters using regex when regex=true', () => {
-			expect(search(rows, '^B', true)).toEqual([rows[1]]);
-		});
-
-		it('applies the transform function before filtering', () => {
-			const transform = (r: any) => ({...r, name: r.name.toLowerCase()});
-			expect(search(rows, 'alice', false, transform)).toEqual([rows[0]]);
-		});
-
-		it('uses logicTest for non-regex search', () => {
-			expect(search(rows, 'age == 30')).toEqual([rows[0], rows[2]]);
-			expect(search(rows, 'id = 2')).toEqual([rows[1]]);
-		});
-
-		it('returns all if search is falsy and regex enabled', () => {
-			expect(search(rows, '', true)).toEqual(rows);
-		});
-
-		it('handles regex search with special characters', () => {
-			expect(search(rows, '^[AC]', true)).toEqual([rows[0], rows[2]]);
-		});
-
-		it('ignores case when regex is applied', () => {
-			expect(search(rows, 'ALICE', true)).toEqual([]);
-		});
-
-		it('performs partial matches for properties when regex=false', () => {
-			expect(search(rows, 'Da')).toEqual([rows[3]]);
-		});
-
 		it('handles empty array input gracefully', () => {
 			expect(search([], 'test')).toEqual([]);
 		});
 
-		it('handles numeric values with comparison logic in strings', () => {
-			expect(search(rows, 'age < 31')).toEqual([rows[0], rows[1], rows[2]]);
+		it('applies transform before filtering', () => {
+			const transform = (r: any) => ({...r, name: r.name.toLowerCase()});
+			expect(search(rows, 'alice', transform)).toEqual([rows[0]]);
 		});
 
-		// New test cases for `+` and `-` operators
-		it('filters rows using the + operator', () => {
-			expect(search(rows, 'name += Al')).toEqual([rows[0]]);
+		describe('plain text', () => {
+			it('matches case-insensitively when lowercase', () => {
+				expect(search(rows, 'alice')).toEqual([rows[0]]);
+			});
+
+			it('matches case-sensitively when uppercase present', () => {
+				expect(search(rows, 'Alice')).toEqual([rows[0]]);
+				expect(search(rows, 'ALICE')).toEqual([]);
+			});
+
+			it('performs partial matches', () => {
+				expect(search(rows, 'Da')).toEqual([rows[3]]);
+			});
 		});
 
-		it('filters rows using the - operator', () => {
-			expect(search(rows, 'name -= Al')).toEqual([rows[1], rows[2], rows[3]]);
+		describe('global regex', () => {
+			it('matches with valid /pattern/flags syntax', () => {
+				expect(search(rows, '/^B/g')).toEqual([rows[1]]);
+			});
+
+			it('matches multiple rows', () => {
+				expect(search(rows, '/^[AC]/g')).toEqual([rows[0], rows[2]]);
+			});
+
+			it('respects flags', () => {
+				expect(search(rows, '/alice/i')).toEqual([rows[0]]);
+				expect(search(rows, '/alice/g')).toEqual([]);
+			});
+
+			it('does not treat /pattern/ without flags as regex', () => {
+				expect(search(rows, '/Alice/')).toEqual([]);
+			});
+
+			it('does not treat paths as regex', () => {
+				const pathRows = [{url: 'users/alice'}];
+				expect(search(pathRows, 'users/alice')).toEqual(pathRows);
+			});
+		});
+
+		describe('property operators', () => {
+			it('filters with equality', () => {
+				expect(search(rows, 'age == 30')).toEqual([rows[0], rows[2]]);
+				expect(search(rows, 'id = 2')).toEqual([rows[1]]);
+			});
+
+			it('filters with inequality', () => {
+				expect(search(rows, 'name != Alice')).toEqual([rows[1], rows[2], rows[3]]);
+			});
+
+			it('filters with contains', () => {
+				expect(search(rows, 'name += Al')).toEqual([rows[0]]);
+			});
+
+			it('filters with not-contains', () => {
+				expect(search(rows, 'name -= Al')).toEqual([rows[1], rows[2], rows[3]]);
+			});
+
+			it('filters with numeric comparisons', () => {
+				expect(search(rows, 'age < 31')).toEqual([rows[0], rows[1], rows[2]]);
+				expect(search(rows, 'age > 30')).toEqual([rows[3]]);
+				expect(search(rows, 'age >= 30')).toEqual([rows[0], rows[2], rows[3]]);
+			});
+		});
+
+		describe('property regex', () => {
+			it('matches with ~= shorthand', () => {
+				expect(search(rows, 'name ~= ^Al')).toEqual([rows[0]]);
+			});
+
+			it('matches with ~= /pattern/flags', () => {
+				expect(search(rows, 'name ~= /^al/i')).toEqual([rows[0]]);
+			});
+
+			it('excludes with !~', () => {
+				expect(search(rows, 'name !~ ^[AB]')).toEqual([rows[2], rows[3]]);
+			});
+		});
+
+		describe('logical operators', () => {
+			it('supports &&', () => {
+				expect(search(rows, 'age == 30 && name != Alice')).toEqual([rows[2]]);
+			});
+
+			it('supports ||', () => {
+				expect(search(rows, 'name = Alice || name = Bob')).toEqual([rows[0], rows[1]]);
+			});
+		});
+
+		describe('dataset helpers', () => {
+			const dupeRows = [
+				{id: 1, email: 'a@a.com', type: 'admin'},
+				{id: 2, email: 'b@b.com', type: 'user'},
+				{id: 3, email: 'a@a.com', type: 'user'},
+				{id: 4, email: 'c@c.com', type: 'admin'},
+			];
+
+			it('unique() returns rows where field appears once', () => {
+				expect(search(dupeRows, 'unique(email)')).toEqual([dupeRows[1], dupeRows[3]]);
+			});
+
+			it('duplicate() returns rows where field appears more than once', () => {
+				expect(search(dupeRows, 'duplicate(email)')).toEqual([dupeRows[0], dupeRows[2]]);
+			});
+
+			it('distinct() returns one row per field value', () => {
+				expect(search(dupeRows, 'distinct(type)')).toEqual([dupeRows[0], dupeRows[1]]);
+			});
+
+			it('composes helpers with predicates', () => {
+				expect(search(dupeRows, 'type = user && duplicate(email)')).toEqual([]);
+			});
+
+			it('applies distinct last', () => {
+				expect(search(dupeRows, 'duplicate(email) && distinct(type)')).toEqual([dupeRows[0], dupeRows[2]]);
+			});
 		});
 	});
 
@@ -83,60 +158,63 @@ describe('Search Utilities', () => {
 			expect(logicTest(obj, 'x < 5')).toBe(false);
 		});
 
-		it('supports case insensitive property search', () => {
-			expect(logicTest(obj, 'alpha')).toBeTruthy();
-			expect(logicTest(obj, 'ALPHA')).toBeFalsy();
+		it('handles contains and not-contains', () => {
+			expect(logicTest(obj, 'name += Alpha')).toBe(true);
+			expect(logicTest(obj, 'name += Alp')).toBe(true);
+			expect(logicTest(obj, 'name += Bet')).toBe(false);
+			expect(logicTest(obj, 'name -= Alpha')).toBe(false);
+			expect(logicTest(obj, 'name -= Bet')).toBe(true);
+			expect(logicTest(obj, 'name += lph')).toBe(true);
+			expect(logicTest(obj, 'name -= lph')).toBe(false);
 		});
 
-		it('handles logical AND/OR expressions', () => {
+		it('handles property regex ~=', () => {
+			expect(logicTest(obj, 'name ~= ^Alp')).toBe(true);
+			expect(logicTest(obj, 'name ~= /^alp/i')).toBe(true);
+			expect(logicTest(obj, 'name ~= ^Bet')).toBe(false);
+		});
+
+		it('handles property regex !~', () => {
+			expect(logicTest(obj, 'name !~ ^Bet')).toBe(true);
+			expect(logicTest(obj, 'name !~ ^Alp')).toBe(false);
+		});
+
+		it('handles invalid regex gracefully', () => {
+			expect(logicTest(obj, 'name ~= [invalid')).toBe(false);
+		});
+
+		it('supports plain text case-insensitive search', () => {
+			expect(logicTest(obj, 'alpha')).toBe(true);
+		});
+
+		it('supports plain text case-sensitive search', () => {
+			expect(logicTest(obj, 'Alpha')).toBe(true);
+			expect(logicTest(obj, 'ALPHA')).toBe(false);
+		});
+
+		it('handles logical AND/OR', () => {
 			expect(logicTest(obj, 'x == 10 && y == 5')).toBe(true);
 			expect(logicTest(obj, 'x == 10 || y == 100')).toBe(true);
 			expect(logicTest(obj, 'x == 1 && y == 5')).toBe(false);
 		});
 
+		it('handles numeric ranges', () => {
+			expect(logicTest(obj, 'x > 5 && x < 15')).toBe(true);
+			expect(logicTest(obj, 'x > 15')).toBe(false);
+		});
+
+		it('matches keys case-insensitively', () => {
+			const mixedCaseObj = {TestKey: 123};
+			expect(logicTest(mixedCaseObj, 'TestKey == 123')).toBe(true);
+			expect(logicTest(mixedCaseObj, 'testkey == 123')).toBe(true);
+		});
+
 		it('returns false for unsupported operators', () => {
 			expect(logicTest(obj, 'x === 10')).toBe(false);
 		});
 
-		it('handles invalid condition strings gracefully', () => {
-			expect(logicTest(obj, 'invalid condition')).toBe(false);
-		});
-
-		it('supports numeric operations with ranges', () => {
-			expect(logicTest(obj, 'x > 5 && x < 15')).toBe(true);
-			expect(logicTest(obj, 'x > 15')).toBe(false);
-		});
-
-		it('handles mixed case keys gracefully', () => {
-			const mixedCaseObj = {TestKey: 123};
-			expect(logicTest(mixedCaseObj, 'TestKey == 123')).toBe(true);
-			expect(logicTest(mixedCaseObj, 'testkey == 123')).toBe(true);
-		});
-
-		it('returns false if condition operators are missing', () => {
+		it('returns false for missing operators', () => {
 			expect(logicTest(obj, 'x 10')).toBe(false);
 		});
-
-		// New test cases for `+` and `-` operators
-		it('handles the + operator for inclusion', () => {
-			expect(logicTest(obj, 'name += Alpha')).toBe(true);
-			expect(logicTest(obj, 'name += Alp')).toBe(true);
-			expect(logicTest(obj, 'name += Bet')).toBe(false);
-		});
-
-		it('handles the - operator for exclusion', () => {
-			expect(logicTest(obj, 'name -= Alpha')).toBe(false);
-			expect(logicTest(obj, 'name -= Alp')).toBe(false);
-			expect(logicTest(obj, 'name -= Bet')).toBe(true);
-		});
-
-		it('includes partial matches correctly with +', () => {
-			expect(logicTest(obj, 'name += lph')).toBe(true);
-		});
-
-		it('excludes partial matches correctly with -', () => {
-			expect(logicTest(obj, 'name -= lph')).toBe(false);
-			expect(logicTest(obj, 'name -= xyz')).toBe(true);
-		});
 	});
 });

tests/xml.spec.ts

@@ -0,0 +1,210 @@
+import { toXml, fromXml } from '../src';
+
+describe('XML Parser', () => {
+	describe('fromXml', () => {
+		it('should parse simple tag', () => {
+			const xml = '<root></root>';
+			const result = fromXml(xml);
+			expect(result).toEqual({ root: '' });
+		});
+
+		it('should parse self-closing tag', () => {
+			const xml = '<item />';
+			const result = fromXml(xml);
+			expect(result).toEqual({ item: '' });
+		});
+
+		it('should parse tag with attributes (ignored in fast-xml-parser format)', () => {
+			const xml = '<user id="1" name="someone" />';
+			const result = fromXml(xml);
+			expect(result).toEqual({ user: '' });
+		});
+
+		it('should parse tag with text content', () => {
+			const xml = '<email>someone@example.com</email>';
+			const result = fromXml(xml);
+			expect(result).toEqual({ email: 'someone@example.com' });
+		});
+
+		it('should parse tag with numeric content', () => {
+			const xml = '<ttl>240</ttl>';
+			const result = fromXml(xml);
+			expect(result).toEqual({ ttl: 240 });
+		});
+
+		it('should parse nested tags', () => {
+			const xml = '<root><child>text</child></root>';
+			const result = fromXml(xml);
+			expect(result).toEqual({
+				root: {
+					child: 'text'
+				}
+			});
+		});
+
+		it('should parse multiple children with same tag as array', () => {
+			const xml = '<root><item>a</item><item>b</item><item>c</item></root>';
+			const result = fromXml(xml);
+			expect(result).toEqual({
+				root: {
+					item: ['a', 'b', 'c']
+				}
+			});
+		});
+
+		it('should parse mixed children', () => {
+			const xml = '<root><a>1</a><b>2</b><c>3</c></root>';
+			const result = fromXml(xml);
+			expect(result.root).toEqual({ a: 1, b: 2, c: 3 });
+		});
+
+		it('should skip XML declaration and include as key', () => {
+			const xml = '<?xml version="1.0"?><root />';
+			const result = fromXml(xml);
+			expect(result).toHaveProperty('?xml');
+			expect(result).toHaveProperty('root');
+		});
+
+		it('should skip comments', () => {
+			const xml = '<root><!-- comment --><child>text</child></root>';
+			const result = fromXml(xml);
+			expect(result).toEqual({
+				root: {
+					child: 'text'
+				}
+			});
+		});
+
+		it('should handle escaped characters', () => {
+			const xml = '<text>&lt;hello&gt; &amp; &quot;world&quot;</text>';
+			const result = fromXml(xml);
+			expect(result.text).toBe('<hello> & "world"');
+		});
+
+		it('should parse complex nested structure', () => {
+			const xml = `
+        <root>
+          <user id="1" name="someone">
+            <email>someone@example.com</email>
+            <active />
+          </user>
+        </root>
+      `;
+			const result = fromXml(xml);
+			expect(result).toEqual({
+				root: {
+					user: {
+						email: 'someone@example.com',
+						active: ''
+					}
+				}
+			});
+		});
+
+		it('should parse RSS-like structure with multiple items', () => {
+			const xml = `
+                <rss>
+                    <channel>
+                        <title>Test Feed</title>
+                        <item>
+                            <title>Item 1</title>
+                            <link>http://example.com/1</link>
+                        </item>
+                        <item>
+                            <title>Item 2</title>
+                            <link>http://example.com/2</link>
+                        </item>
+                    </channel>
+                </rss>
+            `;
+			const result = fromXml(xml);
+			expect(result.rss.channel.title).toBe('Test Feed');
+			expect(Array.isArray(result.rss.channel.item)).toBe(true);
+			expect(result.rss.channel.item.length).toBe(2);
+			expect(result.rss.channel.item[0].title).toBe('Item 1');
+		});
+	});
+
+	describe('toXml', () => {
+		it('should encode simple tag', () => {
+			const obj = { tag: 'root', attributes: {}, children: [] };
+			expect(toXml(obj)).toBe('<root />');
+		});
+
+		it('should encode tag with attributes', () => {
+			const obj = { tag: 'user', attributes: { id: '1', name: 'someone' }, children: [] };
+			const result = toXml(obj);
+			expect(result).toContain('id="1"');
+			expect(result).toContain('name="someone"');
+		});
+
+		it('should encode tag with text content', () => {
+			const obj = { tag: 'email', attributes: {}, children: ['someone@example.com'] };
+			expect(toXml(obj)).toBe('<email>someone@example.com</email>');
+		});
+
+		it('should encode nested tags with indentation', () => {
+			const obj = {
+				tag: 'root',
+				attributes: {},
+				children: [
+					{ tag: 'child', attributes: {}, children: ['text'] }
+				]
+			};
+			const result = toXml(obj);
+			expect(result).toContain('<root>');
+			expect(result).toContain('  <child>');
+			expect(result).toContain('</root>');
+		});
+
+		it('should escape special characters', () => {
+			const obj = { tag: 'text', attributes: {}, children: ['<hello> & "world"'] };
+			const result = toXml(obj);
+			expect(result).toContain('&lt;hello&gt; &amp; &quot;world&quot;');
+		});
+
+		it('should escape attributes', () => {
+			const obj = { tag: 'node', attributes: { attr: 'a & b' }, children: [] };
+			const result = toXml(obj);
+			expect(result).toContain('attr="a &amp; b"');
+		});
+
+		it('should handle multiple children', () => {
+			const obj = {
+				tag: 'root',
+				attributes: {},
+				children: [
+					{ tag: 'a', attributes: {}, children: [] },
+					{ tag: 'b', attributes: {}, children: [] }
+				]
+			};
+			const result = toXml(obj);
+			expect(result).toContain('<a />');
+			expect(result).toContain('<b />');
+		});
+
+		it('should encode string directly', () => {
+			expect(toXml('hello')).toBe('hello');
+			expect(toXml('a & b')).toBe('a &amp; b');
+		});
+	});
+
+	describe('round-trip', () => {
+		it('should parse toXml output back to fast-xml-parser format', () => {
+			const obj = {
+				tag: 'root',
+				attributes: { id: '1' },
+				children: [
+					{ tag: 'child', attributes: {}, children: ['text'] }
+				]
+			};
+			const xml = toXml(obj);
+			const parsed = fromXml(xml);
+			expect(parsed).toEqual({
+				root: {
+					child: 'text'
+				}
+			});
+		});
+	});
+});