Add sendEvent utility function

Signed-off-by: Francis Bouvier <francis@lightpanda.io>

src/cdp/cdp.zig

@@ -129,14 +129,14 @@ pub fn result(
     return stringify(alloc, resp);
 }
 
-// caller owns the slice returned
+pub fn sendEvent(
-pub fn method(
     alloc: std.mem.Allocator,
+    ctx: *Ctx,
     name: []const u8,
     comptime T: type,
     params: T,
     sessionID: ?[]const u8,
-) ![]const u8 {
+) !void {
     const Resp = struct {
         method: []const u8,
         params: T,
@@ -144,7 +144,9 @@ pub fn method(
     };
     const resp = Resp{ .method = name, .params = params, .sessionId = sessionID };
 
-    return stringify(alloc, resp);
+    const event_msg = try stringify(alloc, resp);
+    std.log.debug("event {s}", .{event_msg});
+    try server.sendSync(ctx, event_msg);
 }
 
 pub fn getParams(

src/cdp/page.zig

@@ -168,6 +168,8 @@ fn navigate(
     ctx.state.url = content.params.url;
     ctx.state.loaderID = "AF8667A203C5392DBE9AC290044AA4C2";
 
+    var page = try ctx.browser.currentSession().createPage();
+
     // output
     const Resp = struct {
         frameId: []const u8,

src/cdp/runtime.zig

@@ -31,12 +31,68 @@ fn enable(
     alloc: std.mem.Allocator,
     id: u64,
     scanner: *std.json.Scanner,
-    _: *Ctx,
+    ctx: *Ctx,
 ) ![]const u8 {
+    _ = ctx;
+
+    // input
     const sessionID = try cdp.getSessionID(scanner);
+
+    // output
+    // const uniqueID = "1367118932354479079.-1471398151593995849";
+    // const mainCtx = try executionContextCreated(
+    //     alloc,
+    //     1,
+    //     cdp.URLBase,
+    //     "",
+    //     uniqueID,
+    //     .{},
+    //     sessionID,
+    // );
+    // std.log.debug("res {s}", .{mainCtx});
+    // try server.sendAsync(ctx, mainCtx);
+
     return result(alloc, id, null, null, sessionID);
 }
 
+const AuxData = struct {
+    isDefault: bool = true,
+    type: []const u8 = "default",
+    frameId: []const u8 = cdp.FrameID,
+};
+
+const ExecutionContextDescription = struct {
+    id: u64,
+    origin: []const u8,
+    name: []const u8,
+    uniqueId: []const u8,
+    auxData: ?AuxData = null,
+};
+
+fn executionContextCreated(
+    alloc: std.mem.Allocator,
+    id: u64,
+    origin: []const u8,
+    name: []const u8,
+    uniqueID: []const u8,
+    auxData: ?AuxData,
+    sessionID: ?[]const u8,
+) ![]const u8 {
+    const Params = struct {
+        context: ExecutionContextDescription,
+    };
+    const params = Params{
+        .context = .{
+            .id = id,
+            .origin = origin,
+            .name = name,
+            .uniqueId = uniqueID,
+            .auxData = auxData,
+        },
+    };
+    return try cdp.method(alloc, "Runtime.executionContextCreated", Params, params, sessionID);
+}
+
 fn runIfWaitingForDebugger(
     alloc: std.mem.Allocator,
     id: u64,

src/cdp/target.zig

@@ -81,15 +81,7 @@ fn tagetSetAutoAttach(
                 .browserContextId = BrowserContextID,
             },
         };
-        const event = try cdp.method(
+        try cdp.sendEvent(alloc, ctx, "Target.attachedToTarget", AttachToTarget, attached, null);
-            alloc,
-            "Target.attachedToTarget",
-            AttachToTarget,
-            attached,
-            null,
-        );
-        std.log.debug("event {s}", .{event});
-        try server.sendSync(ctx, event);
     }
 
     return result(alloc, id, null, null, sessionID);
@@ -196,15 +188,7 @@ fn createTarget(
         },
         .waitingForDebugger = true,
     };
-    const event = try cdp.method(
+    try cdp.sendEvent(alloc, ctx, "Target.attachedToTarget", AttachToTarget, attached, sessionID);
-        alloc,
-        "Target.attachedToTarget",
-        AttachToTarget,
-        attached,
-        sessionID,
-    );
-    std.log.debug("event {s}", .{event});
-    try server.sendSync(ctx, event);
 
     // output
     const Resp = struct {