private static IEnumerable <Json> StrIndicesImpl(
List <IJsonMasherOperator> mashers, Json haystack, IMashContext context)
{
if (haystack == null || haystack.Type != JsonValueType.String)
{
throw context.Error($"_strindices: cannot index over {haystack?.Type}.", haystack);
}
foreach (var needle in mashers[0].Mash(haystack, context))
{
if (needle == null || needle.Type != JsonValueType.String)
{
throw context.Error($"_strindices: cannot index over {needle?.Type}.", needle);
}
var result = new List <Json>();
int start = 0;
while (start >= 0)
{
start = haystack.GetString().IndexOf(needle.GetString(), start);
if (start >= 0)
{
result.Add(Json.Number(start));
start++;
}
}
yield return(Json.Array(result));
}
}
private static IEnumerable <Json> Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json == null || json.Type != JsonValueType.String)
{
throw context.Error($"The input must be a string, not {json?.Type}.", json);
}
foreach (var regex in mashers[0].Mash(json, context))
{
if (regex == null || regex.Type != JsonValueType.String)
{
throw context.Error($"The regex must be a string, not {regex?.Type}.", regex);
}
foreach (var flags in mashers[1].Mash(json, context))
{
string flagsValue = flags.Type == JsonValueType.String ? flags.GetString() : "";
foreach (var onlyTest in mashers[2].Mash(json, context))
{
var matches = GetMatches(
json.GetString(), regex.GetString(), flagsValue, onlyTest.GetBool());
foreach (var match in matches)
{
yield return(match);
}
}
}
}
}
private static IEnumerable <Json> Strptime_Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json == null || json.Type != JsonValueType.String)
{
throw context.Error(
$"strptime: need string representing a date, not {json?.Type}.", json);
}
foreach (var formatString in mashers[0].Mash(json, context))
{
if (formatString == null || formatString.Type != JsonValueType.String)
{
throw context.Error(
$"strptime: need a format string, not {formatString?.Type}.", formatString);
}
if (DateTimeOffset.TryParseExact(
json.GetString(), formatString.GetString(), null, DateTimeStyles.None, out var result))
{
yield return(Json.Number((result - _epoch).TotalSeconds));
}
else
{
throw context.Error(
$"strptime: Can't parse '{json.GetString()}' using '{formatString.GetString()}'.",
json,
formatString);
}
}
}
private static IEnumerable <Json> Function_1(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json.Type == JsonValueType.Array)
{
var masher = mashers.First();
var keys = masher.Mash(json, context).FirstOrDefault();
if (keys == null || keys.Type != JsonValueType.Array)
{
return(Json.Array(json.EnumerateArray().OrderBy(x => x, JsonComparer.Instance))
.AsEnumerable());
}
else
{
var values = json
.EnumerateArray()
.Zip(keys.EnumerateArray(), (v, k) => Tuple.Create(v, k))
.OrderBy(x => x.Item2, JsonComparer.Instance)
.Select(x => x.Item1);
return(Json.Array(values).AsEnumerable());
}
}
else
{
throw context.Error($"Can't sort a {json.Type}.", json);
}
}
private static IEnumerable <Json> FromDate_Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json == null || json.Type != JsonValueType.String)
{
throw context.Error($"fromdateiso8601: Need a string, not {json?.Type}.", json);
}
if (DateTimeOffset.TryParse(json.GetString(), out var result))
{
yield return(Json.Number((result - _epoch).TotalSeconds));
}
else
{
throw context.Error($"fromdateiso8601: Can't parse '{json.GetString()}' as ISO 8601 date.", json);
}
}
private static Json DeletePath(Json json, JsonPath path, IMashContext context)
=> json.TransformByPath(
path,
leafJson => null,
(json, pathPart) => context.Error(
$"Can't index {json.Type} with {pathPart.ToString()}.",
json,
pathPart.ToJson()));
private static IEnumerable <Json> Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json == null || json.Type != JsonValueType.Array)
{
throw context.Error($"Need an array of numbers to implode, not {json?.Type}.", json);
}
var sb = new StringBuilder();
foreach (var value in json.EnumerateArray())
{
if (value == null || value.Type != JsonValueType.Number)
{
throw context.Error($"Needed a number, but got {value?.Type}.", value);
}
sb.Append(((char)(int)value.GetNumber()).ToString());
}
yield return(Json.String(sb.ToString()));
}
private static void EnsureNumber(Json value, IMashContext context, string functionName)
{
if (value != null && value.Type == JsonValueType.Number)
{
return;
}
throw context.Error(
$"Function {functionName} must be applied to numbers, not {value?.Type}.",
value);
}
public static Json HasIndex(Json json, Json index, IMashContext context)
{
return((json.Type, index.Type) switch
{
(JsonValueType.Array, JsonValueType.Number)
=> Json.Bool(json.ContainsKey((int)index.GetNumber())),
(JsonValueType.Object, JsonValueType.String)
=> Json.Bool(json.ContainsKey(index.GetString())),
_ => throw context.Error(
$"Can't index {json.Type} with {index.Type}.", json, index)
});
private static IEnumerable <Json> Strftime_Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json == null || json.Type != JsonValueType.Number)
{
throw context.Error(
$"strftime: need a number of seconds, not {json?.Type}.", json);
}
foreach (var formatString in mashers[0].Mash(json, context))
{
if (formatString == null || formatString.Type != JsonValueType.String)
{
throw context.Error(
$"strftime: need a format string, not {formatString?.Type}.", formatString);
}
var date = _epoch.AddSeconds(json.GetNumber());
var result = date.ToString(formatString.GetString(), CultureInfo.InvariantCulture);
yield return(Json.String(result));
}
}
private static IEnumerable <Json> ToDate_Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json == null || json.Type != JsonValueType.Number)
{
throw context.Error($"todateiso8601: Need a number, not {json?.Type}.", json);
}
var date = _epoch.AddSeconds(json.GetNumber());
yield return(Json.String(date.ToString("o", CultureInfo.InvariantCulture)));
}
private static IEnumerable <Json> Function_0(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
if (json.Type == JsonValueType.Array)
{
return(Json.Array(json.EnumerateArray().OrderBy(x => x, JsonComparer.Instance))
.AsEnumerable());
}
else
{
throw context.Error($"Can't sort a {json.Type}.", json);
}
}
private static IEnumerable <Json> Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
foreach (var value in mashers[0].Mash(json, context))
{
yield return((json.Type, value.Type) switch {
(JsonValueType.String, JsonValueType.String)
=> Json.Bool(json.GetString().IndexOf(value.GetString()) != -1),
(JsonValueType.Array, JsonValueType.Array)
=> Json.Bool(ArrayContains(json, value)),
(JsonValueType.Object, JsonValueType.Object)
=> Json.Bool(ObjectContains(json, value)),
_ => throw context.Error($"Can't check if {json.Type} contains {value.Type}.", json, value)
});
public static IEnumerable <Json> ExtractMinMax(
List <IJsonMasherOperator> mashers, Json json, IMashContext context, bool min)
{
if (json == null || json.Type != JsonValueType.Array)
{
throw context.Error(
$"Cannot find minimum for {json?.Type}, need an array.", json);
}
var keys = mashers[0].Mash(json, context).FirstOrDefault();
if (keys == null || keys.Type != JsonValueType.Array)
{
throw context.Error(
$"Cannot find minimum with {json?.Type} as keys, need an array.", keys);
}
var query = json.EnumerateArray()
.Zip(keys.EnumerateArray(), (v, k) => Tuple.Create(k, v));
if (min)
{
query = query.OrderBy(x => x.Item1, JsonComparer.Instance); // there is no MinBy...
}
else
{
query = query.OrderByDescending(x => x.Item1, JsonComparer.Instance); // there is no MaxBy...
}
var value = query.Take(1).Select(x => x.Item2).FirstOrDefault();
if (value == null)
{
return(Json.Null.AsEnumerable());
}
else
{
return(value.AsEnumerable());
}
}
private static IEnumerable <Json> Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
foreach (var limitValue in mashers[0].Mash(json, context))
{
if (limitValue.Type != JsonValueType.Number)
{
throw context.Error($"Can't use {limitValue.Type} as limit.", limitValue);
}
int limit = (int)limitValue.GetNumber();
foreach (var result in mashers[1].Mash(json, context).Take(limit))
{
yield return(result);
}
}
}
private static IEnumerable <Json> Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
foreach (var value in mashers[1].Mash(json, context))
{
foreach (var pathAsJson in mashers[0].Mash(json, context))
{
var path = context.GetPathFromArray(pathAsJson);
yield return(json.TransformByPath(
path,
leafJson => value,
(json, pathPart) => context.Error(
$"Can't index {json.Type} with {pathPart.ToString()}.",
json,
pathPart.ToJson())));
}
}
}
private static IEnumerable <Json> Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
var result = new List <Json>();
foreach (var pathAsJson in mashers[0].Mash(json, context))
{
var path = context.GetPathFromArray(pathAsJson);
json.TransformByPath(
path,
leafJson => {
result.Add(leafJson);
return(leafJson);
},
(json, pathPart) => context.Error(
$"Can't index {json.Type} with {pathPart.ToString()}.",
json,
pathPart.ToJson()));
}
return(result);
}
private static IEnumerable <Json> Function(
List <IJsonMasherOperator> mashers, Json json, IMashContext context)
{
foreach (var jsonPaths in mashers[0].Mash(json, context))
{
if (jsonPaths.Type != JsonValueType.Array)
{
throw context.Error($"Expected an array of paths.", jsonPaths);
}
var paths = jsonPaths
.EnumerateArray()
.OrderByDescending(x => x, JsonComparer.Instance)
.Select(x => context.GetPathFromArray(x));
var jsonResult = json;
foreach (var path in paths)
{
jsonResult = DeletePath(jsonResult, path, context);
}
yield return(jsonResult);
}
}