3 files changed, 153 insertions, 0 deletions
diff --git a/lib/errors/dune b/lib/errors/dune
new file mode 100644
index 0000000..ab71219
--- /dev/null
+++ b/lib/errors/dune
@@ -0,0 +1,9 @@
+(library
+ (name importErrors)
+ (libraries 
+   csv
+   sqlite3
+   importCSV
+   importDataTypes
+ )
+)
diff --git a/lib/errors/importErrors.ml b/lib/errors/importErrors.ml
new file mode 100644
index 0000000..04f9deb
--- /dev/null
+++ b/lib/errors/importErrors.ml
@@ -0,0 +1,98 @@
+open StdLabels
+module CSV = ImportCSV
+module Table = ImportDataTypes.Table
+
+let bom = "\xEF\xBB\xBF"
+
+type xlsError = {
+  source : Table.t;
+  row : int;
+  sheet : int;
+  target : Table.t option;
+  value : CSV.DataType.t;
+  exn : exn;
+}
+
+exception
+  JsonError of {
+    json : string;
+    element : string;
+  }
+
+exception InvalidEncoding of string
+exception NullKey of int
+exception SqlError of Sqlite3.Rc.t
+exception MisplacedWindow
+exception Unknown_source of string
+exception Unknown_extension of string
+
+exception Cycle of string list
+(** Cycle between the dpendencies *)
+
+exception
+  TypeError of {
+    expected : ImportDataTypes.Types.t;
+    actual : ImportDataTypes.Types.t;
+    expression : string;
+    subset : string;
+  }
+
+let repr_error = function
+  | SqlError s -> Printf.sprintf "%s Error" (Sqlite3.Rc.to_string s)
+  | JsonError { json; element } -> Printf.sprintf "%s : %s" element json
+  | NullKey k ->
+      Printf.sprintf "The key %s is null" (ImportCSV.Csv.column_to_string k)
+  | Unknown_source source ->
+      Printf.sprintf "The source %s is referenced without beiing declared"
+        source
+  | MisplacedWindow -> "A group function cannot appear here"
+  | TypeError { expected; actual; expression; subset } ->
+      Printf.sprintf
+        "In this expression %s has type %s but %s was expected:\n%s" subset
+        (ImportDataTypes.Types.string_of_t actual)
+        (ImportDataTypes.Types.string_of_t expected)
+        expression
+  | Unknown_extension ext -> Printf.sprintf "Unknown file extension %s" ext
+  | Cycle deps ->
+      Printf.sprintf "Cycle between the dependencies : %s"
+        (String.concat ~sep:"," deps)
+  | Failure e -> e
+  | e ->
+      Printexc.print_backtrace Stdlib.stdout;
+      Printexc.to_string e
+
+type t = Csv.out_channel Lazy.t
+
+let output_error : t -> xlsError -> unit =
+ fun csv error ->
+  let target =
+    match error.target with
+    | None -> ""
+    | Some value -> value.name
+  in
+
+  Csv.output_record (Lazy.force csv)
+    [
+      Table.name error.source;
+      string_of_int error.sheet;
+      string_of_int error.row;
+      target;
+      CSV.DataType.to_string error.value;
+      repr_error error.exn;
+    ]
+
+let log : with_bom:bool -> string -> string -> t =
+ fun ~with_bom prefix dirname ->
+  lazy
+    (let file = Filename.concat dirname (String.cat prefix "_errors.csv") in
+
+     prerr_endline @@ String.cat "Errors found. See the file " file;
+
+     (* Open the error file *)
+     let channel = Out_channel.open_bin file in
+     if with_bom then output_string channel bom;
+     let log_error = Csv.to_channel ~separator:';' ~excel_tricks:true channel in
+     (* Generate a header for the error file *)
+     Csv.output_record log_error
+       [ "Source"; "Tab"; "Row"; "Target"; "Value"; "Error" ];
+     log_error)
diff --git a/lib/errors/importErrors.mli b/lib/errors/importErrors.mli
new file mode 100644
index 0000000..7d17a5d
--- /dev/null
+++ b/lib/errors/importErrors.mli
@@ -0,0 +1,46 @@
+module CSV = ImportCSV
+
+exception SqlError of Sqlite3.Rc.t
+exception MisplacedWindow
+
+exception Unknown_source of string
+(** Exception raised when a source used in a path is not declared as an
+    external *)
+
+exception Cycle of string list
+(** Cycle between the dpendencies *)
+
+exception Unknown_extension of string
+
+exception
+  JsonError of {
+    json : string;
+    element : string;
+  }
+
+type xlsError = {
+  source : ImportDataTypes.Table.t;
+  row : int;
+  sheet : int;
+  target : ImportDataTypes.Table.t option;
+  value : CSV.DataType.t;
+  exn : exn;
+}
+
+exception
+  TypeError of {
+    expected : ImportDataTypes.Types.t;
+    actual : ImportDataTypes.Types.t;
+    expression : string;
+    subset : string;
+  }
+
+exception InvalidEncoding of string
+exception NullKey of int
+
+val repr_error : exn -> string
+
+type t = Csv.out_channel Lazy.t
+
+val output_error : t -> xlsError -> unit
+val log : with_bom:bool -> string -> string -> t