Create MistralAIEmbeddingFunction.php

src/Embeddings/MistralAIEmbeddingFunction.php

@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+
+namespace Codewithkyrian\ChromaDB\Embeddings;
+
+use GuzzleHttp\Client;
+use Psr\Http\Client\ClientExceptionInterface;
+
+class MistralAIEmbeddingFunction implements EmbeddingFunction
+{
+    private Client $client;
+
+    public function __construct(
+        public readonly string $apiKey,
+        public readonly string $organization = '',
+        public readonly string $model = 'mistral-embed',
+    )
+    {
+        $headers = [
+            'Authorization' => "Bearer $this->apiKey",
+            'Content-Type' => 'application/json',
+        ];
+
+
+        $this->client = new Client([
+            'base_uri' => 'https://api.mistral.ai/v1/',
+            'headers' => $headers
+        ]);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function generate(array $texts): array
+    {
+        try {
+            $response = $this->client->post('embeddings', [
+                'json' => [
+                    'model' => $this->model,
+                    'input' => $texts,
+                ]
+            ]);
+
+            $result = json_decode($response->getBody()->getContents(), true);
+            $embeddings = $result['data'];
+            usort($embeddings, fn($a, $b) => $a['index'] <=> $b['index']);
+
+            return array_map(fn($embedding) => $embedding['embedding'], $embeddings);
+        } catch (ClientExceptionInterface $e) {
+            throw new \RuntimeException("Error calling MistralAI API: {$e->getMessage()}", 0, $e);
+        }
+    }
+}