1 files changed, 32 insertions, 0 deletions
diff --git a/src/io/readablestream.nim b/src/io/readablestream.nim
new file mode 100644
index 00000000..16a650e2
--- /dev/null
+++ b/src/io/readablestream.nim
@@ -0,0 +1,32 @@
+#TODO....
+
+type
+  UnderlyingSourceStartCallback = proc(controller: ReadableStreamController):
+    Option[JSValue] # may be undefined!
+  UnderlyingSourcePullCallback = proc(controller: ReadableStreamController):
+    EmptyPromise
+  UnderlyingSourceCancelCallback = proc(reason = none(JSValue)): EmptyPromise
+
+  ReadableStreamType = enum
+    BYOB = "byob"
+
+  UnderlyingSource* = object
+    start*: Option[UnderlyingSourceStartCallback]
+    pull*: Option[UnderlyingSourcePullCallback]
+    cancel*: Option[UnderlyingSourcePullCallback]
+    #TODO mark real name being type
+    ctype*: Option[ReadableStreamType]
+
+  QueuingStrategySize = proc(chunk: JSValue): float64 # unrestricted
+
+  QueuingStrategy* = object
+    highWaterMark*: float64 # unrestricted
+    size*: QueuingStrategySize
+
+  ReadableStream* = object
+    underlyingSource: UnderlyingSource
+
+proc newReadableStream(underlyingSource = none(UnderlyingSource),
+    strategy = none(QueuingStrategySize)): ReadableStream =
+  let this = ReadableStream()
+  discard