60 lines
2.3 KiB
C#
60 lines
2.3 KiB
C#
using System.Net.Http.Json;
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using System.Text;
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using System.Text.Json;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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using UniVerse.Application.Interfaces;
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namespace UniVerse.Infrastructure.ExternalServices;
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public class LlmClient : ILlmClient
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{
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private readonly HttpClient _http;
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private readonly IConfiguration _config;
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private readonly ILogger<LlmClient> _logger;
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public LlmClient(HttpClient http, IConfiguration config, ILogger<LlmClient> logger)
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{
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_http = http; _config = config; _logger = logger;
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}
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public async Task<LlmReviewAnalysis> AnalyzeReviewAsync(string reviewText, string lectureContext)
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{
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var prompt = $"""
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Analyze the following student review of a lecture. Return a JSON object with:
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- quality_score: float 0-1 indicating review quality
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- sentiment: "Positive", "Neutral", or "Negative"
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- tags: array of relevant topic tags
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- is_informative: boolean indicating if the review is informative
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Lecture context: {lectureContext}
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Review text: {reviewText}
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""";
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var request = new
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{
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model = _config["Llm:Model"] ?? "gpt-4o-mini",
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messages = new[] { new { role = "user", content = prompt } },
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temperature = 0.3,
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response_format = new { type = "json_object" }
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};
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var apiKey = _config["Llm:ApiKey"] ?? "";
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_http.DefaultRequestHeaders.Clear();
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if (!string.IsNullOrEmpty(apiKey))
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_http.DefaultRequestHeaders.Add("Authorization", $"Bearer {apiKey}");
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var response = await _http.PostAsJsonAsync("chat/completions", request);
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response.EnsureSuccessStatusCode();
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var json = await response.Content.ReadFromJsonAsync<JsonElement>();
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var content = json.GetProperty("choices")[0].GetProperty("message").GetProperty("content").GetString()!;
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var analysis = JsonSerializer.Deserialize<LlmRawResponse>(content,
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new JsonSerializerOptions { PropertyNameCaseInsensitive = true })!;
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return new LlmReviewAnalysis(analysis.QualityScore, analysis.Sentiment, analysis.Tags, analysis.IsInformative);
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}
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private record LlmRawResponse(double QualityScore, string Sentiment, string[] Tags, bool IsInformative);
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}
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