Algolia多索引搜索结果聚合：实现统一的命中列表

{
  "results": [
    {
      "hits": [
        { "objectID": "p1", "title": "Product A", "index_type": "products" }
      ],
      "page": 0,
      "nbHits": 1,
      "nbPages": 1,
      "index": "products"
    },
    {
      "hits": [
        { "objectID": "r1", "title": "Resource X", "index_type": "resources" },
        { "objectID": "r2", "title": "Resource Y", "index_type": "resources" }
      ],
      "page": 0,
      "nbHits": 2,
      "nbPages": 1,
      "index": "resources"
    },
    {
      "hits": [
        { "objectID": "n1", "title": "News Update", "index_type": "news" }
      ],
      "page": 0,
      "nbHits": 1,
      "nbPages": 1,
      "index": "news"
    }
  ]
}

<?php

// 模拟Algolia MultipleQueries的响应数据
// 实际应用中，这会是Algolia客户端的search()方法返回的结果
$algoliaResponse = [
    "results" => [
        [
            "hits" => [
                ["objectID" => "p_101", "name" => "Laptop Pro", "category" => "Electronics"],
                ["objectID" => "p_102", "name" => "Mouse Wireless", "category" => "Accessories"]
            ],
            "index" => "products",
            "nbHits" => 2
        ],
        [
            "hits" => [
                ["objectID" => "r_201", "title" => "User Guide v2.0", "type" => "Documentation"],
                ["objectID" => "r_202", "title" => "API Reference", "type" => "Documentation"]
            ],
            "index" => "resources",
            "nbHits" => 2
        ],
        [
            "hits" => [
                ["objectID" => "n_301", "headline" => "Company Q3 Earnings", "date" => "2023-10-26"]
            ],
            "index" => "news",
            "nbHits" => 1
        ]
    ]
];

// 初始化一个空数组来存储所有聚合后的命中
$aggregatedHits = [];
$totalNbHits = 0;

// 遍历每个索引的结果
foreach ($algoliaResponse['results'] as $indexResult) {
    $indexName = $indexResult['index'];
    $totalNbHits += $indexResult['nbHits'];

    // 遍历当前索引的所有命中
    foreach ($indexResult['hits'] as $hit) {
        // 添加一个字段来标识命中的原始索引
        $hit['_index'] = $indexName;
        $aggregatedHits[] = $hit;
    }
}

// 可选：对聚合后的命中进行排序
// 例如，按某个公共字段（如日期）排序，或者根据自定义逻辑
// usort($aggregatedHits, function($a, $b) {
//     // 假设所有命中都有一个 'date' 字段
//     return strtotime($b['date']) - strtotime($a['date']);
// });

// 最终的聚合结果
$finalAggregatedResponse = [
    "hits" => $aggregatedHits,
    "nbHits" => $totalNbHits, // 总命中数
    // 可以根据需要添加其他元数据，例如 page, nbPages, query, params 等
    "page" => 0, // 聚合后通常需要重新计算或处理分页
    "hitsPerPage" => count($aggregatedHits), // 示例：所有命中都在一页
    "query" => "your_query", // 原始查询
    "processingTimeMS" => 0 // 聚合操作的额外时间
];

// 输出聚合后的结果
echo json_encode($finalAggregatedResponse, JSON_PRETTY_PRINT);

?>

搜索框: [用户输入查询]

-----------------------------------------
| 搜索结果                               |
-----------------------------------------
| 产品 (3)     | 文档 (2)    | 新闻 (1)    |
-----------------------------------------
|                                       |
| **产品**                              |
| - Laptop Pro (电子产品)               |
| - Wireless Mouse (配件)               |
| - Monitor 4K (电子产品)               |
|                                       |
| **文档**                              |
| - User Guide v2.0 (文档)              |
| - API Reference (文档)                |
|                                       |
| **新闻**                              |
| - Company Q3 Earnings (新闻)          |
-----------------------------------------