Initial json parsing and validation

4 files changed, 97 insertions, 0 deletions

diff --git a/dune-project b/dune-project
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+++ b/dune-project
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+(lang dune 2.5)
+(name ocamllb)
+
+(generate_opam_files true)
+
+(license BSD-3-Clause)
+(authors "Ryan Kavanagh <rak@rak.ac>")
+
+(package
+ (name ocamllb)
+ (synopsis "ListenBrainz library")
+ (depends
+   (atdgen (>= 2.0.0))
+   (yojson (>= 1.5.0))))
diff --git a/lib/dune b/lib/dune
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index 0000000..2f9cfb7
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+++ b/lib/dune
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+(library
+ (name ocamllb)
+ (public_name ocamllb)
+ (libraries atdgen))
+
+(rule
+ (targets listenbrainz_j.ml
+          listenbrainz_j.mli)
+ (deps    listenbrainz.atd)
+ (action  (run atdgen -j -j-std %{deps})))
+
+(rule
+ (targets listenbrainz_t.ml
+          listenbrainz_t.mli)
+ (deps    listenbrainz.atd)
+ (action  (run atdgen -t %{deps})))
diff --git a/lib/listenbrainz.atd b/lib/listenbrainz.atd
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+++ b/lib/listenbrainz.atd
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+type mbid = string
+type isrc = string
+
+type additional_info = {
+  ?artist_mbids : mbid list option;
+  ?release_group_mbid : mbid list option;
+  ?release_mid : mbid option;
+  ?recording_mbid : mbid option;
+  ?track_mbid : mbid option;
+  ?work_mbids : mbid list option;
+  ?tracknumber : int option;
+  ?isrc : isrc option;
+  ?spotify_id : string option;
+  ?tags : string list option;
+  ?listening_from : string option;
+}
+
+type track_metadata = {
+  artist_name : string;
+  track_name : string;
+  ?listened_at : int option;
+  ?additional_info : additional_info option;
+  ?release_name : string option;
+}
+
+type listen_type = [
+    Single <json name="single">
+  | Playing_now <json name="playing_now">
+  | Import <json name="import">
+]
+
+type listen_payload = {
+  listened_at : int;
+  track_metadata : track_metadata;
+}
+
+type submission = {
+  listen_type : listen_type;
+  payload : listen_payload list;
+} <ocaml valid="Listenbrainz_util.validate_submission">
+
+type response = {
+  count : int;
+  user_id : mbid;
+  listens : listen_payload list;
+} <ocaml valid="Listenbrainz_util.validate_response">
+
+type validate_token = {
+  code : int;
+  message : string;
+  valid : bool;
+  user: string;
+}
+
+type delete_listen = {
+  listened_at : int;
+  recording_msid : string;
+}
diff --git a/lib/listenbrainz_util.ml b/lib/listenbrainz_util.ml
new file mode 100644
index 0000000..35a7af8
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+++ b/lib/listenbrainz_util.ml
@@ -0,0 +1,9 @@
+open Listenbrainz_t
+
+let validate_submission s =
+  match s.listen_type with
+  | `Single -> List.length s.payload = 1
+  | _ -> true
+
+let validate_response r =
+  List.length r.listens = r.count