Implement `fs.watchFile()`fs-watch-file

Closes #3812

3 files changed, 59 insertions, 14 deletions

diff --git a/src/bun.js/bindings/bindings.zig b/src/bun.js/bindings/bindings.zig
index 924eb27a1..f6b9f3ce1 100644
--- a/src/bun.js/bindings/bindings.zig
+++ b/src/bun.js/bindings/bindings.zig
@@ -3461,6 +3461,7 @@ pub const JSValue = enum(JSValueReprInt) {
             i8 => @as(i8, @truncate(toInt32(this))),
             i32 => @as(i32, @truncate(toInt32(this))),
             i64 => this.toInt64(),
+            f64 => this.asNumber(),
             bool => this.toBoolean(),
             else => @compileError("Not implemented yet"),
         };
@@ -3989,6 +3990,10 @@ pub const JSValue = enum(JSValueReprInt) {
         return FFI.JSVALUE_IS_NUMBER(.{ .asJSValue = this });
     }
 
+    pub fn isNumeric(this: JSValue) bool {
+        return this.isNumber() or this.isBigInt();
+    }
+
     pub fn isError(this: JSValue) bool {
         if (!this.isCell())
             return false;
@@ -5211,15 +5216,21 @@ pub const CallFrame = opaque {
         var ptr = self.argumentsPtr();
         return switch (@as(u4, @min(len, max))) {
             0 => .{ .ptr = undefined, .len = 0 },
-            4 => Arguments(max).init(comptime @min(4, max), ptr),
+            1 => Arguments(max).init(comptime @min(1, max), ptr),
             2 => Arguments(max).init(comptime @min(2, max), ptr),
-            6 => Arguments(max).init(comptime @min(6, max), ptr),
             3 => Arguments(max).init(comptime @min(3, max), ptr),
-            8 => Arguments(max).init(comptime @min(8, max), ptr),
+            4 => Arguments(max).init(comptime @min(4, max), ptr),
             5 => Arguments(max).init(comptime @min(5, max), ptr),
-            1 => Arguments(max).init(comptime @min(1, max), ptr),
+            6 => Arguments(max).init(comptime @min(6, max), ptr),
             7 => Arguments(max).init(comptime @min(7, max), ptr),
-            else => unreachable,
+            8 => Arguments(max).init(comptime @min(8, max), ptr),
+            9 => Arguments(max).init(comptime @min(9, max), ptr),
+            10 => Arguments(max).init(comptime @min(10, max), ptr),
+            11 => Arguments(max).init(comptime @min(11, max), ptr),
+            12 => Arguments(max).init(comptime @min(12, max), ptr),
+            13 => Arguments(max).init(comptime @min(13, max), ptr),
+            14 => Arguments(max).init(comptime @min(14, max), ptr),
+            15 => Arguments(max).init(comptime @min(15, max), ptr),
         };
     }
 
diff --git a/src/bun.js/node/node_fs_watcher.zig b/src/bun.js/node/node_fs_watcher.zig
index d0af350c0..4819b61fe 100644
--- a/src/bun.js/node/node_fs_watcher.zig
+++ b/src/bun.js/node/node_fs_watcher.zig
@@ -364,11 +364,6 @@ pub const FSWatcher = struct {
                     }
                 },
                 .directory => {
-                    // macOS should use FSEvents for directories
-                    if (comptime Environment.isMac) {
-                        @panic("Unexpected directory watch");
-                    }
-
                     const affected = event.names(changed_files);
 
                     for (affected) |changed_name_| {
diff --git a/src/bun.js/node/types.zig b/src/bun.js/node/types.zig
index 23d693d69..1f8964e2a 100644
--- a/src/bun.js/node/types.zig
+++ b/src/bun.js/node/types.zig
@@ -1302,6 +1302,29 @@ fn StatsDataType(comptime T: type) type {
                     @as(Date, @enumFromInt(@as(u64, @intCast(@max(stat_.birthtime().tv_sec, 0))))),
             };
         }
+
+        pub fn fromJS(args: []JSC.JSValue) @This() {
+            return @This(){
+                .dev = if (args.len > 0 and args[0].isNumeric()) args[0].to(T) else 0,
+                .ino = if (args.len > 1 and args[1].isNumeric()) args[1].to(T) else 0,
+                .mode = if (args.len > 2 and args[2].isNumeric()) args[2].to(T) else 0,
+                .nlink = if (args.len > 3 and args[3].isNumeric()) args[3].to(T) else 0,
+                .uid = if (args.len > 4 and args[4].isNumeric()) args[4].to(T) else 0,
+                .gid = if (args.len > 5 and args[5].isNumeric()) args[5].to(T) else 0,
+                .rdev = if (args.len > 6 and args[6].isNumeric()) args[6].to(T) else 0,
+                .size = if (args.len > 7 and args[7].isNumeric()) args[7].to(T) else 0,
+                .blksize = if (args.len > 8 and args[8].isNumeric()) args[8].to(T) else 0,
+                .blocks = if (args.len > 9 and args[9].isNumeric()) args[9].to(T) else 0,
+                .atime_ms = if (args.len > 10 and args[10].isNumeric()) args[10].to(f64) else 0,
+                .mtime_ms = if (args.len > 11 and args[11].isNumeric()) args[11].to(f64) else 0,
+                .ctime_ms = if (args.len > 12 and args[12].isNumeric()) args[12].to(f64) else 0,
+                .birthtime_ms = if (args.len > 13 and args[13].isNumeric()) args[13].to(T) else 0,
+                .atime = @as(Date, @enumFromInt(if (args.len > 10 and args[10].isNumeric()) args[10].to(u64) else 0)),
+                .mtime = @as(Date, @enumFromInt(if (args.len > 11 and args[11].isNumeric()) args[11].to(u64) else 0)),
+                .ctime = @as(Date, @enumFromInt(if (args.len > 12 and args[12].isNumeric()) args[12].to(u64) else 0)),
+                .birthtime = @as(Date, @enumFromInt(if (args.len > 13 and args[13].isNumeric()) args[13].to(u64) else 0)),
+            };
+        }
     };
 }
 
@@ -1431,10 +1454,26 @@ pub const Stats = union(enum) {
         return this;
     }
 
-    pub fn constructor(globalThis: *JSC.JSGlobalObject, _: *JSC.CallFrame) callconv(.C) ?*Stats {
-        globalThis.throw("Stats is not constructable. use fs.stat()", .{});
-
-        return null;
+    pub fn constructor(_: *JSC.JSGlobalObject, callframe: *JSC.CallFrame) callconv(.C) ?*This {
+        var this = bun.default_allocator.create(Stats) catch unreachable;
+        var arguments = callframe.arguments(15);
+        var args = arguments.ptr[0..arguments.len];
+        if (args.len > 0 and args[0].isBoolean()) {
+            if (args[0].toBoolean()) {
+                this.* = .{
+                    .big = StatsDataType(i64).fromJS(args[1..]),
+                };
+            } else {
+                this.* = .{
+                    .small = StatsDataType(i32).fromJS(args[1..]),
+                };
+            }
+        } else {
+            this.* = .{
+                .small = StatsDataType(i32).fromJS(args),
+            };
+        }
+        return this;
     }
 
     comptime {