css_merge application

2 files changed, 24 insertions, 0 deletions

diff --git a/elements/dune b/elements/dune
index 755bd05..97d0753 100755
--- a/elements/dune
+++ b/elements/dune
@@ -3,5 +3,7 @@
  (libraries 
    brr
    brr.note
+   js_of_ocaml
    )
+ (preprocess (pps ppx_hash js_of_ocaml-ppx))
 )
diff --git a/elements/transfert.ml b/elements/transfert.ml
new file mode 100755
index 0000000..ddeecd0
--- /dev/null
+++ b/elements/transfert.ml
@@ -0,0 +1,22 @@
+open Js_of_ocaml
+open Brr
+
+let send
+  : mime_type:Jstr.t -> filename:Jstr.t -> Jstr.t -> unit
+  = fun ~mime_type ~filename content ->
+    let btoa = Jv.get Jv.global "btoa" in
+    let base64data = Jv.apply btoa
+        [| Jv.of_jstr content |] in
+
+    let mime =   (Jv.Id.(of_jv @@ to_jv mime_type))
+    and base64 = (Jv.Id.(of_jv @@ to_jv base64data))
+    in
+
+    let data = (Js.string "data:")##concat_3 mime (Js.string ";base64,") base64 in
+
+    (* Create the link to download the the element, and simulate a click on it *)
+    let a = El.a
+        ~at:At.[ href Jv.Id.(of_jv @@ to_jv data)
+               ; v (Jstr.v "download") filename ]
+        [] in
+    El.click a