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Diagnostics.pqm
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let
Diagnostics.LogValue = (prefix, value) =>
Diagnostics.Trace(
TraceLevel.Information,
prefix & ": " & (try Diagnostics.ValueToText(value) otherwise "<error getting value>"),
value
),
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
_canBeIdentifier = (x) =>
let
keywords = {
"and",
"as",
"each",
"else",
"error",
"false",
"if",
"in",
"is",
"let",
"meta",
"not",
"otherwise",
"or",
"section",
"shared",
"then",
"true",
"try",
"type"
},
charAlpha = (c as number) => (c >= 65 and c <= 90) or (c >= 97 and c <= 122) or c = 95,
charDigit = (c as number) => c >= 48 and c <= 57
in
try
charAlpha(Character.ToNumber(Text.At(x, 0)))
and List.MatchesAll(
Text.ToList(x), (c) => let num = Character.ToNumber(c) in charAlpha(num)
or charDigit(num)
)
and not List.MatchesAny(keywords, (li) => li = x) otherwise false,
Serialize.Binary = (x) => "#binary(" & Serialize(Binary.ToList(x)) & ") ",
Serialize.Date = (x) =>
"#date(" & Text.From(Date.Year(x)) & ", " & Text.From(Date.Month(x)) & ", " & Text.From(Date.Day(x))
& ") ",
Serialize.Datetime = (x) =>
"#datetime("
& Text.From(Date.Year(DateTime.Date(x)))
& ", "
& Text.From(Date.Month(DateTime.Date(x)))
& ", "
& Text.From(Date.Day(DateTime.Date(x)))
& ", "
& Text.From(Time.Hour(DateTime.Time(x)))
& ", "
& Text.From(Time.Minute(DateTime.Time(x)))
& ", "
& Text.From(Time.Second(DateTime.Time(x)))
& ") ",
Serialize.Datetimezone = (x) =>
let
dtz = DateTimeZone.ToRecord(x)
in
"#datetimezone("
& Text.From(dtz[Year])
& ", "
& Text.From(dtz[Month])
& ", "
& Text.From(dtz[Day])
& ", "
& Text.From(dtz[Hour])
& ", "
& Text.From(dtz[Minute])
& ", "
& Text.From(dtz[Second])
& ", "
& Text.From(dtz[ZoneHours])
& ", "
& Text.From(dtz[ZoneMinutes])
& ") ",
Serialize.Duration = (x) =>
let
dur = Duration.ToRecord(x)
in
"#duration("
& Text.From(dur[Days])
& ", "
& Text.From(dur[Hours])
& ", "
& Text.From(dur[Minutes])
& ", "
& Text.From(dur[Seconds])
& ") ",
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.Accumulate(
x, "", (seed, item) => if seed = "" then Serialize(item) else seed & ", " & Serialize(item)
)
& "} ",
Serialize.Logical = (x) => Text.From(x),
Serialize.Null = (x) => "null",
Serialize.Number = (x) =>
let
Text.From = (i as number) as text =>
if Number.IsNaN(i) then
"#nan"
else if i = Number.PositiveInfinity then
"#infinity"
else if i = Number.NegativeInfinity then
"-#infinity"
else
Text.From(i)
in
Text.From(x),
Serialize.Record = (x) =>
"[ "
& List.Accumulate(
Record.FieldNames(x),
"",
(seed, item) =>
(if seed = "" then Serialize.Identifier(item) else seed & ", " & Serialize.Identifier(
item
))
& " = "
& Serialize(Record.Field(x, item))
)
& " ] ",
Serialize.Table = (x) =>
"#table( type " & _serialize_table_type(Value.Type(x)) & ", " & Serialize(Table.ToRows(x)) & ") ",
Serialize.Text = (x) => """" & _serialize_text_content(x) & """",
_serialize_text_content = (x) =>
let
escapeText = (n as number) as text =>
"#(#)(" & Text.PadStart(Number.ToText(n, "X", "en-US"), 4, "0") & ")"
in
List.Accumulate(
List.Transform(
Text.ToList(x),
(c) =>
let
n = Character.ToNumber(c)
in
if n = 9 then
"#(#)(tab)"
else if n = 10 then
"#(#)(lf)"
else if n = 13 then
"#(#)(cr)"
else if n = 34 then
""""""
else if n = 35 then
"#(#)(#)"
else if n < 32 then
escapeText(n)
else if n < 127 then
Character.FromNumber(n)
else
escapeText(n)
),
"",
(s, i) => s & i
),
Serialize.Identifier = (x) => if _canBeIdentifier(x) then x else "#""" & _serialize_text_content(x) & """",
Serialize.Time = (x) =>
"#time("
& Text.From(Time.Hour(x))
& ", "
& Text.From(Time.Minute(x))
& ", "
& Text.From(Time.Second(x))
& ") ",
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.Accumulate(
List.Transform(
Table.ToRecords(Table.Sort(schema, "Position")),
each Serialize.Identifier(_[Name]) & " = " & _[Kind]
),
"",
(seed, item) => (if seed = "" then item else seed & ", " & item)
)
& "] "
),
_serialize_record_type = (x) =>
let
flds = Type.RecordFields(x)
in
if Record.FieldCount(flds) = 0 then
"record"
else
"["
& List.Accumulate(
Record.FieldNames(flds),
"",
(seed, item) =>
seed
& (if seed <> "" then ", " else "")
& (
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.Accumulate(
funsig,
"",
(seed, item) =>
(if seed = "" then "" else seed & ", ")
& (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 Serialize.Date(x) otherwise "null /*serialize failed*/"
else if x is datetime then
try Serialize.Datetime(x) otherwise "null /*serialize failed*/"
else if x is datetimezone then
try Serialize.Datetimezone(x) otherwise "null /*serialize failed*/"
else if x is duration then
try Serialize.Duration(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 Serialize.Logical(x) otherwise "null /*serialize failed*/"
else if x is null then
try Serialize.Null(x) otherwise "null /*serialize failed*/"
else if x is number then
try Serialize.Number(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 Serialize.Text(x) otherwise "null /*serialize failed*/"
else if x is time then
try Serialize.Time(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
]