初始提交

2026-08-26 18:06:02 +08:00
commit 5544788917
53 changed files with 4101 additions and 0 deletions
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+using System.ComponentModel;
+using System.Net.Http.Headers;
+using System.Text.Json;
+
+namespace MAF1.Tools;
+
+public sealed class WeatherTools(WeatherOptions options, HttpClient http)
+{
+    [Description("Look up live weather for a city or location. Always call this instead of guessing.")]
+    public async Task<string> GetWeather(
+        [Description("City or location name, for example Amsterdam or 北京.")] string location)
+    {
+        if (string.IsNullOrWhiteSpace(location))
+        {
+            return "未提供地点，无法查询天气。";
+        }
+
+        string provider = options.Provider.Trim();
+        try
+        {
+            if (provider.Equals("OpenWeather", StringComparison.OrdinalIgnoreCase))
+            {
+                if (string.IsNullOrWhiteSpace(options.OpenWeather.ApiKey))
+                {
+                    return "OpenWeather 已启用，但 appsettings.json 里 Weather:OpenWeather:ApiKey 为空。请填入密钥，或把 Provider 改回 Wttr。";
+                }
+
+                return await QueryOpenWeatherAsync(location);
+            }
+
+            return await QueryWttrAsync(location);
+        }
+        catch (Exception ex)
+        {
+            return $"查询天气失败（{provider} / {location}）：{ex.Message}";
+        }
+    }
+
+    private async Task<string> QueryWttrAsync(string location)
+    {
+        string url = Expand(options.Wttr.UrlTemplate, location, apiKey: null);
+        using HttpResponseMessage response = await http.GetAsync(url);
+        string body = (await response.Content.ReadAsStringAsync()).Trim();
+        if (!response.IsSuccessStatusCode)
+        {
+            return $"wttr.in 返回 {(int)response.StatusCode}：{body}";
+        }
+
+        return string.IsNullOrWhiteSpace(body)
+            ? $"wttr.in 没有返回 {location} 的天气。"
+            : body;
+    }
+
+    private async Task<string> QueryOpenWeatherAsync(string location)
+    {
+        string url = Expand(options.OpenWeather.UrlTemplate, location, options.OpenWeather.ApiKey);
+        using HttpResponseMessage response = await http.GetAsync(url);
+        string body = await response.Content.ReadAsStringAsync();
+        if (!response.IsSuccessStatusCode)
+        {
+            return $"OpenWeather 返回 {(int)response.StatusCode}：{body}";
+        }
+
+        using JsonDocument doc = JsonDocument.Parse(body);
+        JsonElement root = doc.RootElement;
+        string name = root.TryGetProperty("name", out JsonElement nameEl) ? nameEl.GetString() ?? location : location;
+        string description = root.TryGetProperty("weather", out JsonElement weather)
+            && weather.ValueKind == JsonValueKind.Array
+            && weather.GetArrayLength() > 0
+            && weather[0].TryGetProperty("description", out JsonElement descEl)
+                ? descEl.GetString() ?? ""
+                : "";
+        double temp = root.TryGetProperty("main", out JsonElement main) && main.TryGetProperty("temp", out JsonElement tempEl)
+            ? tempEl.GetDouble()
+            : double.NaN;
+        int humidity = main.ValueKind == JsonValueKind.Object && main.TryGetProperty("humidity", out JsonElement humidityEl)
+            ? humidityEl.GetInt32()
+            : 0;
+
+        return double.IsNaN(temp)
+            ? body
+            : $"{name}：{description}，气温 {temp:0.#}°C，湿度 {humidity}%";
+    }
+
+    private string Expand(string template, string location, string? apiKey)
+    {
+        return template
+            .Replace("{location}", Uri.EscapeDataString(location), StringComparison.OrdinalIgnoreCase)
+            .Replace("{lang}", Uri.EscapeDataString(options.Language), StringComparison.OrdinalIgnoreCase)
+            .Replace("{apiKey}", apiKey ?? "", StringComparison.OrdinalIgnoreCase);
+    }
+
+    public static HttpClient CreateHttpClient()
+    {
+        HttpClient http = new() { Timeout = TimeSpan.FromSeconds(20) };
+        http.DefaultRequestHeaders.UserAgent.Add(new ProductInfoHeaderValue("MAF1", "1.0"));
+        http.DefaultRequestHeaders.AcceptLanguage.ParseAdd("zh-CN,zh;q=0.9,en;q=0.8");
+        return http;
+    }
+}