README

MockEngine is a lightweight, pure PHP (PHP 8.1+) in-memory query engine that lets you filter, sort, join, group, and aggregate raw arrays or object lists using an elegant, Laravel/Symfony-style fluent Query Builder—completely without any database overhead!

It is perfect for unit testing, in-memory caching systems, sorting baskets in e-commerce, or managing nested datasets in microservices.

Features

✨ Fluent Query Builder: Build queries using where(), orWhere(), select(), orderBy(), limit(), groupBy(), join(), and leftJoin().
🎯 Point Notation (Nested Access): Query nested arrays or objects instantly, e.g., where('profile.address.city', '=', 'Istanbul').
⚙️ Advanced Operators: Support for =, !=, >, <, >=, <=, LIKE, NOT LIKE, IN, NOT IN, BETWEEN, and NOT BETWEEN.
🔗 Relation Joins: Easily perform INNER JOIN and LEFT JOIN operations across different arrays or object collections.
🗃️ Group By & Collections: Group results automatically, and utilize the built-in Collection wrapper for powerful aggregations (sum, avg, min, max, pluck).
🚀 Zero Dependencies: Written entirely in pure, highly-optimized PHP.

Installation

Install the package via Composer:

composer require yaknet/mock-engine

Quick Start

1. Basic Filtering

use YakNet\MockEngine\QueryBuilder;

$users = [
    ['id' => 1, 'name' => 'John Doe', 'role' => 'admin', 'profile' => ['city' => 'Istanbul']],
    ['id' => 2, 'name' => 'Jane Smith', 'role' => 'user', 'profile' => ['city' => 'Ankara']],
    ['id' => 3, 'name' => 'Bob Johnson', 'role' => 'user', 'profile' => ['city' => 'Izmir']],
];

// Query active admins in Istanbul
$results = QueryBuilder::from($users)
    ->select('id', 'name', 'profile.city as city')
    ->where('role', '=', 'user')
    ->where('profile.city', '!=', 'Ankara')
    ->get();

// Returns a Collection containing:
// [ ['id' => 3, 'name' => 'Bob Johnson', 'city' => 'Izmir'] ]

2. Complex & Nested Logical Groups (AND / OR)

You can group logical operations together by passing a Closure to where or orWhere:

$results = QueryBuilder::from($users)
    ->where('status', '=', 'active')
    ->where(function (QueryBuilder $query) {
        $query->where('role', '=', 'admin')
              ->orWhere('profile.verified', '=', true);
    })
    ->get();

3. Joining Two Collections (INNER / LEFT JOIN)

$posts = [
    ['id' => 101, 'user_id' => 1, 'title' => 'First Post'],
    ['id' => 102, 'user_id' => 1, 'title' => 'Second Post'],
    ['id' => 103, 'user_id' => 2, 'title' => 'Hello World'],
];

// Perform INNER JOIN
$results = QueryBuilder::from($users)
    ->select('name', 'title')
    ->join($posts, 'id', '=', 'user_id')
    ->get();

4. Grouping & Collection Aggregations

If you use groupBy(), the results will be grouped into a nested Collection of Collections:

$grouped = QueryBuilder::from($users)
    ->groupBy('profile.city')
    ->get();

// Get the average age of users in Istanbul
$istanbulUsers = $grouped['Istanbul']; // This is a Collection!
$averageAge = $istanbulUsers->avg('age');
$maxAge = $istanbulUsers->max('age');
$names = $istanbulUsers->pluck('name'); // ['John Doe', ...]

Running Tests

All features are fully verified with a comprehensive unit test suite:

vendor/bin/phpunit

License

This project is licensed under the MIT License. See LICENSE.md for details.

yaknet / mock-engine

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