Init Remap

.github/workflows/phpunit.yaml

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+on:
+  pull_request:
+  push:
+
+name: "PHPUnit"
+
+jobs:
+  phpunit:
+    name: PHP ${{ matrix.php }}-${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+        php:
+          - "8.0"
+          - "8.1"
+          - "8.2"
+          - "8.3"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2.3.4
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+          coverage: pcov
+
+      - name: Install dependencies
+        run: composer install
+
+      - name: Run tests with code coverage.
+        run: vendor/bin/phpunit --coverage-clover=coverage.xml --colors=always
+
+      - name: Upload coverage to Codecov.
+        if: matrix.os == 'ubuntu-latest'
+        uses: codecov/codecov-action@v3
+        with:
+          files: ./coverage.xml

.github/workflows/psalm.yaml

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+on:
+  pull_request:
+  push:
+
+name: "Psalm"
+
+jobs:
+  phpunit:
+    name: PHP ${{ matrix.php }}-${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+        php:
+          - "8.0"
+          - "8.1"
+          - "8.2"
+          - "8.3"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2.3.4
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer:v2
+
+      - name: Install dependencies
+        run: composer install
+
+      - name: Run psalm.
+        run: vendor/bin/psalm --shepherd --stats --output-format=github --php-version=${{ matrix.php }}

.gitignore

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+/vendor/
+.idea
+composer.lock
+.phpunit.result.cache
+.phpunit.cache

README.md

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+# User ID tracing
+
+The library allows you to track the unique user in the application.
+
+[![Latest Stable Version](https://poser.pugx.org/xepozz/remap/v/stable.svg)](https://packagist.org/packages/xepozz/remap)
+[![Total Downloads](https://poser.pugx.org/xepozz/remap/downloads.svg)](https://packagist.org/packages/xepozz/remap)
+[![phpunit](https://github.com/xepozz/remap/workflows/PHPUnit/badge.svg)](https://github.com/xepozz/remap/actions)
+[![codecov](https://codecov.io/gh/xepozz/remap/branch/master/graph/badge.svg?token=UREXAOUHTJ)](https://codecov.io/gh/xepozz/remap)
+[![type-coverage](https://shepherd.dev/github/xepozz/remap/coverage.svg)](https://shepherd.dev/github/xepozz/remap)
+
+## Installation
+
+```bash
+composer req xepozz/remap
+```
+
+## Description
+
+The library allows you to map data from the database to objects.
+
+The main goal is to simplify the process of querying long SQL queries and mapping the result to objects.
+
+The mapper is designed to be used with querying of many objects at once.
+It uses `\Generator` to fetch data from the database and map it to objects one by one, so it's memory efficient.
+
+Under the hood, it uses:
+- [yiisoft/db](https://github.com/yiisoft/db) to fetch data from the database
+- [yiisoft/hydrator](https://github.com/yiisoft/hydrator) to map data to objects.
+
+## Usage
+
+Pass a class name and a query to the `Remap`. 
+
+```php
+final class Todo
+{
+    public int $id;
+    public string $title;
+    public int $status;
+    public int $created_at;
+}
+```
+
+```php
+$sql = 'SELECT id, title, status, created_at FROM todo WHERE id = :id LIMIT 1';
+$params = ['id' => 1];
+
+$remap->map(Todo::class, $sql, $params); // returns \Generator of Todo objects
+```
+
+### Tips
+
+#### Define query-related methods in the class
+
+```php
+final class Todo
+{
+    public int $id;
+    public string $title;
+    public int $status;
+    public int $created_at;
+
+    public static function selectOne(int $id): array
+    {
+        return [
+            'SELECT id, title, status, created_at FROM todo WHERE id = :id LIMIT 1',
+            ['id' => $id],
+        ];
+    }
+
+    public static function selectAll(): string
+    {
+        return 'SELECT id, title, status, created_at FROM todo';
+    }
+}
+```
+
+And now it's easy to use:
+
+```php
+$remap->map(Todo::class, ...Todo::selectOne(1));
+$remap->map(Todo::class, Todo::selectOne(1)); // or shorter
+$remap->map(Todo::class, Todo::selectAll());
+```
+
+#### Unpack and store the result
+
+```php
+$remap->map(...)
+```
+
+Always returns a generator. If you want to get an array of objects, use `iterator_to_array`:
+
+```php
+$result = iterator_to_array(
+    $remap->map(Todo::class, Todo::selectOne(1))
+);
+```
+
+Or shorter:
+
+```php
+$result = [...$remap->map(Todo::class, Todo::selectOne(1))];
+```

composer.json

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+{
+    "name": "xepozz/remap",
+    "type": "library",
+    "require": {
+        "yiisoft/hydrator": "dev-master",
+        "yiisoft/db": "^1.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^10.5",
+        "vimeo/psalm": "^5.23",
+        "yiisoft/db-sqlite": "^1.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Xepozz\\Remap\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Xepozz\\Remap\\Tests\\": "tests/"
+        }
+    },
+    "authors": [
+        {
+            "name": "Dmitrii Derepko",
+            "email": "xepozz@list.ru"
+        }
+    ]
+}

phpunit.xml.dist

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+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         colors="true"
+         failOnRisky="false"
+         failOnWarning="false"
+         stopOnFailure="false"
+         executionOrder="random"
+         resolveDependencies="true"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd"
+         cacheDirectory=".phpunit.cache"
+>
+    <php>
+        <ini name="error_reporting" value="-1"/>
+    </php>
+    <testsuites>
+        <testsuite name="Tests">
+            <directory>./tests</directory>
+        </testsuite>
+    </testsuites>
+    <source>
+        <include>
+            <directory>./src</directory>
+        </include>
+    </source>
+</phpunit>

psalm.xml

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+<?xml version="1.0"?>
+<psalm
+    errorLevel="2"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    findUnusedBaselineEntry="true"
+    findUnusedCode="false"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+</psalm>

src/Remap.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Xepozz\Remap;
+
+use Throwable;
+use Yiisoft\Db\Connection\ConnectionInterface;
+use Yiisoft\Db\Exception\Exception;
+use Yiisoft\Db\Exception\InvalidConfigException;
+use Yiisoft\Hydrator\HydratorInterface;
+
+final class Remap
+{
+    public function __construct(
+        private readonly HydratorInterface $hydrator,
+        private readonly ConnectionInterface $connection,
+    ) {
+    }
+
+    /**
+     * @template T
+     * @param class-string<T> $class
+     * @return iterable<T>
+     * @throws Throwable
+     * @throws Exception
+     * @throws InvalidConfigException
+     */
+    public function map(string $class, string|array $sql, array $params = []): iterable
+    {
+        if (is_array($sql)) {
+            $params = $sql[1] ?? $params;
+            $sql = $sql[0];
+        }
+        $iterator = $this->connection->createCommand($sql, $params)->query();
+        foreach ($iterator as $row) {
+            yield $this->hydrator->create($class, $row);
+        }
+    }
+}

tests/.gitignore

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+database.