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Diffstat (limited to 'libpanto/src/null_store.zig')
| -rw-r--r-- | libpanto/src/null_store.zig | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/libpanto/src/null_store.zig b/libpanto/src/null_store.zig deleted file mode 100644 index 1f3ab74..0000000 --- a/libpanto/src/null_store.zig +++ /dev/null @@ -1,108 +0,0 @@ -//! `NullStore`: a no-op `SessionStore` for embedders who opt out of -//! persistence (and the default backing for an `Agent` constructed without -//! a real store). -//! -//! Every append is dropped. `load` returns null. `list` returns an empty -//! slice. `create`/`resolve`/`latest` mint/return empty handles. The struct -//! holds an allocator (needed to satisfy the `SessionInfo` ownership -//! contract for the empty handles it mints) and is trivially copyable. - -const std = @import("std"); -const Allocator = std.mem.Allocator; - -const session_store_mod = @import("session_store.zig"); -const conversation_mod = @import("conversation.zig"); - -const SessionStore = session_store_mod.SessionStore; -const Session = session_store_mod.Session; -const SessionInfo = session_store_mod.SessionInfo; -const PersistentMessage = session_store_mod.PersistentMessage; -const Conversation = conversation_mod.Conversation; - -pub const NullStore = struct { - allocator: Allocator, - - pub fn init(allocator: Allocator) NullStore { - return .{ .allocator = allocator }; - } - - fn emptyInfo(self: *NullStore) SessionInfo { - const a = self.allocator; - return .{ - .id = a.dupe(u8, "") catch "", - .created = a.dupe(u8, "") catch "", - .modified = a.dupe(u8, "") catch "", - .message_count = 0, - .last_user_message = a.dupe(u8, "") catch "", - .api_style = .openai_chat, - .base_url = a.dupe(u8, "") catch "", - .model = a.dupe(u8, "") catch "", - .reasoning = .default, - }; - } - - fn createVT(ctx: *anyopaque) Session { - const self: *NullStore = @ptrCast(@alignCast(ctx)); - return .{ .info = self.emptyInfo(), .store = self.store() }; - } - - fn listVT(ctx: *anyopaque) anyerror![]SessionInfo { - const self: *NullStore = @ptrCast(@alignCast(ctx)); - return self.allocator.alloc(SessionInfo, 0); - } - - fn freeSessionInfosVT(ctx: *anyopaque, infos: []SessionInfo) void { - const self: *NullStore = @ptrCast(@alignCast(ctx)); - for (infos) |i| i.deinit(self.allocator); - self.allocator.free(infos); - } - - fn resolveVT(_: *anyopaque, _: []const u8) anyerror!?Session { - return null; - } - - fn latestVT(_: *anyopaque) anyerror!?Session { - return null; - } - - fn loadVT(_: *anyopaque, _: []const u8) anyerror!?Conversation { - return null; - } - - fn appendMessagesVT(_: *anyopaque, _: []const u8, _: []PersistentMessage) anyerror!void { - // Drop everything. The PersistentMessages borrow in-memory data - // owned by the caller (the conversation); nothing to free here. - } - - const vtable: SessionStore.VTable = .{ - .create = createVT, - .list = listVT, - .freeSessionInfos = freeSessionInfosVT, - .resolve = resolveVT, - .latest = latestVT, - .load = loadVT, - .appendMessages = appendMessagesVT, - }; - - /// Wrap this `NullStore` as a `SessionStore`. The handle borrows - /// `self`; `self` must outlive it. - pub fn store(self: *NullStore) SessionStore { - return .{ .ptr = self, .vtable = &vtable }; - } -}; - -const testing = std.testing; - -test "NullStore: appends are dropped and load returns null" { - var ns = NullStore.init(testing.allocator); - const s = ns.store(); - - try s.appendMessages("sid", &.{}); - try testing.expect((try s.load("sid")) == null); - try testing.expect((try s.resolve("sid")) == null); - try testing.expect((try s.latest()) == null); - - const infos = try s.list(); - defer s.freeSessionInfos(infos); - try testing.expectEqual(@as(usize, 0), infos.len); -} |
