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Diagnostics.pqm
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let
Diagnostics.LogValue = (prefix, value, optional delayed) => Diagnostics.Trace(TraceLevel.Information, prefix & ": " & (try Diagnostics.ValueToText(value) otherwise "<error getting value>"), value, delayed),
Diagnostics.LogValue2 = (prefix, value, result, optional delayed) => Diagnostics.Trace(TraceLevel.Information, prefix & ": " & Diagnostics.ValueToText(value), result, delayed),
Diagnostics.LogFailure = (text, function) =>
let
result = try function()
in
if result[HasError] then Diagnostics.LogValue2(text, result[Error], () => error result[Error], true) else result[Value],
Diagnostics.WrapFunctionResult = (innerFunction as function, outerFunction as function) as function =>
Function.From(Value.Type(innerFunction), (list) => outerFunction(() => Function.Invoke(innerFunction, list))),
Diagnostics.WrapHandlers = (handlers as record) as record =>
Record.FromList(
List.Transform(
Record.FieldNames(handlers),
(h) => Diagnostics.WrapFunctionResult(Record.Field(handlers, h), (fn) => Diagnostics.LogFailure(h, fn))),
Record.FieldNames(handlers)),
Diagnostics.ValueToText = (value) =>
let
List.TransformAndCombine = (list, transform, separator) => Text.Combine(List.Transform(list, transform), separator),
Serialize.Binary = (x) => "#binary(" & Serialize(Binary.ToList(x)) & ") ",
Serialize.Function = (x) => _serialize_function_param_type(
Type.FunctionParameters(Value.Type(x)),
Type.FunctionRequiredParameters(Value.Type(x)) ) &
" as " &
_serialize_function_return_type(Value.Type(x)) &
" => (...) ",
Serialize.List = (x) => "{" & List.TransformAndCombine(x, Serialize, ", ") & "} ",
Serialize.Record = (x) => "[ " &
List.TransformAndCombine(
Record.FieldNames(x),
(item) => Serialize.Identifier(item) & " = " & Serialize(Record.Field(x, item)),
", ") &
" ] ",
Serialize.Table = (x) => "#table( type " &
_serialize_table_type(Value.Type(x)) &
", " &
Serialize(Table.ToRows(x)) &
") ",
Serialize.Identifier = Expression.Identifier,
Serialize.Type = (x) => "type " & _serialize_typename(x),
_serialize_typename = (x, optional funtype as logical) => /* Optional parameter: Is this being used as part of a function signature? */
let
isFunctionType = (x as type) => try if Type.FunctionReturn(x) is type then true else false otherwise false,
isTableType = (x as type) => try if Type.TableSchema(x) is table then true else false otherwise false,
isRecordType = (x as type) => try if Type.ClosedRecord(x) is type then true else false otherwise false,
isListType = (x as type) => try if Type.ListItem(x) is type then true else false otherwise false
in
if funtype=null and isTableType(x) then _serialize_table_type(x) else
if funtype=null and isListType(x) then "{ " & @_serialize_typename( Type.ListItem(x) ) & " }" else
if funtype=null and isFunctionType(x) then "function " & _serialize_function_type(x) else
if funtype=null and isRecordType(x) then _serialize_record_type(x) else
if x = type any then "any" else
let base = Type.NonNullable(x) in
(if Type.IsNullable(x) then "nullable " else "") &
(if base = type anynonnull then "anynonnull" else
if base = type binary then "binary" else
if base = type date then "date" else
if base = type datetime then "datetime" else
if base = type datetimezone then "datetimezone" else
if base = type duration then "duration" else
if base = type logical then "logical" else
if base = type none then "none" else
if base = type null then "null" else
if base = type number then "number" else
if base = type text then "text" else
if base = type time then "time" else
if base = type type then "type" else
/* Abstract types: */
if base = type function then "function" else
if base = type table then "table" else
if base = type record then "record" else
if base = type list then "list" else
"any /*Actually unknown type*/"),
_serialize_table_type = (x) =>
let
schema = Type.TableSchema(x)
in
"table " &
(if Table.IsEmpty(schema) then "" else
"[" & List.TransformAndCombine(
Table.ToRecords(Table.Sort(schema,"Position")),
each Serialize.Identifier(_[Name]) & " = " & _[Kind],
", ") &
"] "),
_serialize_record_type = (x) =>
let flds = Type.RecordFields(x)
in
if Record.FieldCount(flds)=0 then "record" else
"[" & List.TransformAndCombine(
Record.FieldNames(flds),
(item) => Serialize.Identifier(item) & "=" & _serialize_typename(Record.Field(flds,item)[Type]),
", ") &
(if Type.IsOpenRecord(x) then ", ..." else "") &
"]",
_serialize_function_type = (x) => _serialize_function_param_type(
Type.FunctionParameters(x),
Type.FunctionRequiredParameters(x) ) &
" as " &
_serialize_function_return_type(x),
_serialize_function_param_type = (t,n) =>
let
funsig = Table.ToRecords(
Table.TransformColumns(
Table.AddIndexColumn( Record.ToTable( t ), "isOptional", 1 ),
{ "isOptional", (x)=> x>n } ) )
in
"(" &
List.TransformAndCombine(
funsig,
(item)=>
(if item[isOptional] then "optional " else "") &
Serialize.Identifier(item[Name]) & " as " & _serialize_typename(item[Value], true),
", ") &
")",
_serialize_function_return_type = (x) => _serialize_typename(Type.FunctionReturn(x), true),
Serialize = (x) as text =>
if x is binary then try Serialize.Binary(x) otherwise "null /*serialize failed*/" else
if x is date then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is datetime then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is datetimezone then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is duration then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is function then try Serialize.Function(x) otherwise "null /*serialize failed*/" else
if x is list then try Serialize.List(x) otherwise "null /*serialize failed*/" else
if x is logical then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is null then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is number then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is record then try Serialize.Record(x) otherwise "null /*serialize failed*/" else
if x is table then try Serialize.Table(x) otherwise "null /*serialize failed*/" else
if x is text then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is time then try Expression.Constant(x) otherwise "null /*serialize failed*/" else
if x is type then try Serialize.Type(x) otherwise "null /*serialize failed*/" else
"[#_unable_to_serialize_#]"
in
try Serialize(value) otherwise "<serialization failed>"
in
[
LogValue = Diagnostics.LogValue,
LogValue2 = Diagnostics.LogValue2,
LogFailure = Diagnostics.LogFailure,
WrapFunctionResult = Diagnostics.WrapFunctionResult,
WrapHandlers = Diagnostics.WrapHandlers,
ValueToText = Diagnostics.ValueToText
]