1 files changed, 90 insertions, 0 deletions
diff --git a/lib/configuration/importConf.ml b/lib/configuration/importConf.ml
new file mode 100644
index 0000000..586be3c
--- /dev/null
+++ b/lib/configuration/importConf.ml
@@ -0,0 +1,90 @@
+open StdLabels
+module Syntax = Syntax
+module Table = ImportDataTypes.Table
+module Path = ImportDataTypes.Path
+module T = Read_conf
+module Expression = ImportExpression.T
+
+let current_syntax = 1
+
+let t_of_yojson : Yojson.Safe.t -> Syntax.t =
+ fun json ->
+  let keys = Yojson.Safe.Util.keys json in
+  let version =
+    match List.find_opt keys ~f:(String.equal "version") with
+    | None ->
+        Printf.printf
+          "No version given. Your setup may break in the future.\n\
+           Please add « \"version\":%d » in your configuration.\n\n"
+          current_syntax;
+        `Int 1
+    | Some _ -> Yojson.Safe.Util.member "version" json
+  in
+
+  match version with
+  | `Int 1 -> Of_json.t_of_yojson json
+  | other ->
+      Printf.eprintf "Unsuported version : %s\n" (Yojson.Safe.to_string other);
+      exit 1
+
+module TomlReader = Read_conf.Make (Helpers.Toml.Decode)
+
+let t_of_toml : Otoml.t -> (Syntax.t, string) result =
+ fun toml ->
+  let version =
+    Otoml.find toml (Otoml.get_integer ~strict:false) [ "version" ]
+  in
+  match version with
+  | 1 -> TomlReader.read toml
+  | _ ->
+      Printf.eprintf "Unsuported version : %d\n" version;
+      exit 1
+
+let dummy_conf =
+  Syntax.
+    {
+      source = { file = ""; tab = 0; name = "" };
+      version = 1;
+      externals = [];
+      columns = [];
+      filters = [];
+      sort = [];
+      uniq = [];
+    }
+
+let get_table_for_name : Syntax.t -> string option -> Table.t =
+ fun conf name ->
+  match name with
+  | None -> conf.source
+  | Some name ->
+      if String.equal name conf.source.name then conf.source
+      else
+        let ext =
+          List.find conf.externals ~f:(fun (ext : Syntax.extern) ->
+              String.equal name ext.target.name)
+        in
+        ext.target
+
+let root_table : Syntax.t -> Table.t = fun conf -> conf.source
+
+let get_dependancies_for_table : Syntax.t -> Table.t -> Syntax.extern list =
+ fun conf source ->
+  let is_root = source = conf.source in
+
+  List.filter conf.externals ~f:(fun (ext : Syntax.extern) ->
+      (* Enumerate the intern_key and check the source pointed by each column *)
+      Expression.fold_values ext.intern_key ~init:false ~f:(fun acc expr ->
+          if acc then acc
+          else
+            match expr.Syntax.Path.alias with
+            | Some v -> String.equal v source.name
+            | None -> is_root))
+
+let print_path_expression t = ImportExpression.Repr.repr Path.repr t
+
+let print_extern t =
+  let toml = Syntax.toml_of_extern t in
+  Otoml.Printer.to_string toml
+
+let expression_from_string s =
+  Read_conf.ExpressionParser.of_string Read_conf.ExpressionParser.path s