feat: 添加 TickerController 股票代码模糊搜索接口

AssetManager.API/Controllers/TickerController.cs

@@ -0,0 +1,96 @@
+using AssetManager.Data;
+using AssetManager.Models;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
+using SqlSugar;
+
+namespace AssetManager.API.Controllers;
+
+/// <summary>
+/// 股票代码查询接口
+/// </summary>
+[ApiController]
+[Route("api/v1/ticker")]
+[Authorize]
+public class TickerController : ControllerBase
+{
+    private readonly ILogger<TickerController> _logger;
+    private readonly ISqlSugarClient _db;
+
+    public TickerController(ILogger<TickerController> logger, ISqlSugarClient db)
+    {
+        _logger = logger;
+        _db = db;
+    }
+
+    /// <summary>
+    /// 模糊搜索股票代码
+    /// </summary>
+    /// <param name="keyword">搜索关键词（ticker 或 exchange）</param>
+    /// <param name="limit">返回数量上限（默认 20）</param>
+    /// <returns>匹配的股票代码列表</returns>
+    [HttpGet("search")]
+    public async Task<ActionResult<ApiResponse<List<TickerSearchResult>>>> SearchTicker(
+        [FromQuery] string keyword,
+        [FromQuery] int limit = 20)
+    {
+        try
+        {
+            _logger.LogInformation($"Search ticker with keyword: {keyword}, limit: {limit}");
+
+            if (string.IsNullOrWhiteSpace(keyword))
+            {
+                return Ok(new ApiResponse<List<TickerSearchResult>>
+                {
+                    code = AssetManager.Models.StatusCodes.Success,
+                    data = new List<TickerSearchResult>(),
+                    message = "Keyword is empty"
+                });
+            }
+
+            // 模糊搜索：ticker 包含 keyword 或者 exchange 包含 keyword
+            var results = await _db.Queryable<TiingoTicker>()
+                .Where(t => t.Ticker.Contains(keyword) || t.Exchange.Contains(keyword))
+                .Take(limit)
+                .OrderBy(t => t.Ticker)
+                .Select(t => new TickerSearchResult
+                {
+                    Ticker = t.Ticker,
+                    Exchange = t.Exchange,
+                    AssetType = t.AssetType,
+                    PriceCurrency = t.PriceCurrency
+                })
+                .ToListAsync();
+
+            return Ok(new ApiResponse<List<TickerSearchResult>>
+            {
+                code = AssetManager.Models.StatusCodes.Success,
+                data = results,
+                message = "Success"
+            });
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, $"Error searching ticker with keyword: {keyword}");
+
+            return StatusCode(AssetManager.Models.StatusCodes.InternalServerError, new ApiResponse<List<TickerSearchResult>>
+            {
+                code = AssetManager.Models.StatusCodes.InternalServerError,
+                data = null,
+                message = ex.Message
+            });
+        }
+    }
+}
+
+/// <summary>
+/// 股票代码搜索结果
+/// </summary>
+public class TickerSearchResult
+{
+    public string? Ticker { get; set; }
+    public string? Exchange { get; set; }
+    public string? AssetType { get; set; }
+    public string? PriceCurrency { get; set; }
+}