| 1 | using System.Collections.Frozen; |
| 2 | using System.Text.Json; |
| 3 | |
| 4 | namespace OpenAgentRegistry.Mcp; |
| 5 | |
| 6 | internal static class ToolHandlers |
| 7 | { |
| 8 | internal static async Task<ApiResult> HandleAsync( |
| 9 | string name, |
| 10 | RegistryApiClient client, |
| 11 | IReadOnlyDictionary<string, JsonElement> args, |
| 12 | CancellationToken cancellationToken) |
| 13 | { |
| 14 | return name switch |
| 15 | { |
| 16 | "register_agent" => await client.RegisterAsync(ParseRegister(args), cancellationToken).ConfigureAwait(false), |
| 17 | "search_agents" => await client.SearchAsync(ParseSearch(args), cancellationToken).ConfigureAwait(false), |
| 18 | "get_agent" => await client.GetByNameAsync(RequireString(args, "name"), cancellationToken).ConfigureAwait(false), |
| 19 | _ => throw new ArgumentException($"Unknown tool: {name}."), |
| 20 | }; |
| 21 | } |
| 22 | |
| 23 | private static RegisterAgentPayload ParseRegister(IReadOnlyDictionary<string, JsonElement> args) |
| 24 | { |
| 25 | var agentName = RequireString(args, "name"); |
| 26 | return new RegisterAgentPayload( |
| 27 | Name: agentName, |
| 28 | Description: OptionalString(args, "description"), |
| 29 | Skills: OptionalStringArray(args, "skills"), |
| 30 | Seeking: OptionalStringArray(args, "seeking"), |
| 31 | LogicalLineId: OptionalString(args, "logical_line_id"), |
| 32 | ContributorLines: OptionalStringArray(args, "contributor_lines"), |
| 33 | EndpointUrl: OptionalString(args, "endpoint_url"), |
| 34 | Protocols: OptionalStringArray(args, "protocols")); |
| 35 | } |
| 36 | |
| 37 | private static SearchQuery ParseSearch(IReadOnlyDictionary<string, JsonElement> args) |
| 38 | { |
| 39 | var limit = OptionalInt(args, "limit", 20); |
| 40 | limit = Math.Clamp(limit, 1, 100); |
| 41 | return new SearchQuery( |
| 42 | Q: OptionalString(args, "q"), |
| 43 | Skill: OptionalString(args, "skill"), |
| 44 | LogicalLineId: OptionalString(args, "logical_line_id"), |
| 45 | ClaimedOnly: OptionalBool(args, "claimed_only", defaultValue: true), |
| 46 | Limit: limit); |
| 47 | } |
| 48 | |
| 49 | private static string RequireString(IReadOnlyDictionary<string, JsonElement> args, string key) |
| 50 | { |
| 51 | var value = OptionalString(args, key); |
| 52 | if (string.IsNullOrWhiteSpace(value)) |
| 53 | throw new ArgumentException($"{key} is required."); |
| 54 | return value.Trim(); |
| 55 | } |
| 56 | |
| 57 | private static string? OptionalString(IReadOnlyDictionary<string, JsonElement> args, string key) |
| 58 | => args.TryGetValue(key, out var value) ? value.GetString() : null; |
| 59 | |
| 60 | private static bool OptionalBool(IReadOnlyDictionary<string, JsonElement> args, string key, bool defaultValue) |
| 61 | { |
| 62 | if (!args.TryGetValue(key, out var value)) |
| 63 | return defaultValue; |
| 64 | return value.ValueKind switch |
| 65 | { |
| 66 | JsonValueKind.True => true, |
| 67 | JsonValueKind.False => false, |
| 68 | _ => defaultValue, |
| 69 | }; |
| 70 | } |
| 71 | |
| 72 | private static int OptionalInt(IReadOnlyDictionary<string, JsonElement> args, string key, int defaultValue) |
| 73 | => args.TryGetValue(key, out var value) && value.TryGetInt32(out var n) ? n : defaultValue; |
| 74 | |
| 75 | private static IReadOnlyList<string>? OptionalStringArray(IReadOnlyDictionary<string, JsonElement> args, string key) |
| 76 | { |
| 77 | if (!args.TryGetValue(key, out var value) || value.ValueKind != JsonValueKind.Array) |
| 78 | return null; |
| 79 | |
| 80 | var list = new List<string>(); |
| 81 | foreach (var item in value.EnumerateArray()) |
| 82 | { |
| 83 | var text = item.GetString(); |
| 84 | if (!string.IsNullOrWhiteSpace(text)) |
| 85 | list.Add(text.Trim()); |
| 86 | } |
| 87 | |
| 88 | return list.Count == 0 ? null : list; |
| 89 | } |
| 90 | } |
| 91 | |