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using System.Text;
using Npgsql;
using NpgsqlTypes;
namespace NpgsqlRest;
public class RoutineSource(
string? schemaSimilarTo = null,
string? schemaNotSimilarTo = null,
string[]? includeSchemas = null,
string[]? excludeSchemas = null,
string? nameSimilarTo = null,
string? nameNotSimilarTo = null,
string[]? includeNames = null,
string[]? excludeNames = null,
string? query = null,
CommentsMode? commentsMode = null,
string? customTypeParameterSeparator = "_",
string[]? includeLanguages = null,
string[]? excludeLanguages = null) : IRoutineSource
{
public string? SchemaSimilarTo { get; set; } = schemaSimilarTo;
public string? SchemaNotSimilarTo { get; set; } = schemaNotSimilarTo;
public string[]? IncludeSchemas { get; set; } = includeSchemas;
public string[]? ExcludeSchemas { get; set; } = excludeSchemas;
public string? NameSimilarTo { get; set; } = nameSimilarTo;
public string? NameNotSimilarTo { get; set; } = nameNotSimilarTo;
public string[]? IncludeNames { get; set; } = includeNames;
public string[]? ExcludeNames { get; set; } = excludeNames;
public string? Query { get; set; } = query ?? RoutineSourceQuery.Query;
public CommentsMode? CommentsMode { get; set; } = commentsMode;
public string? CustomTypeParameterSeparator { get; set; } = customTypeParameterSeparator;
public string[]? IncludeLanguages { get; set; } = includeLanguages;
public string[]? ExcludeLanguages { get; set; } = excludeLanguages;
public IEnumerable<(Routine, IRoutineSourceParameterFormatter)> Read(IServiceProvider? serviceProvider, RetryStrategy? retryStrategy)
{
bool shouldDispose = true;
NpgsqlConnection? connection = null;
try
{
Options.CreateAndOpenSourceConnection(serviceProvider, ref connection, ref shouldDispose);
if (connection is null)
{
yield break;
}
using var command = connection.CreateCommand();
Query ??= RoutineSourceQuery.Query;
if (Query.Contains(Consts.Space) is false)
{
command.CommandText = string.Concat("select * from ", Query, "($1,$2,$3,$4,$5,$6,$7,$8,$9,$10)");
}
else
{
command.CommandText = Query;
}
command.AddParameter(SchemaSimilarTo ?? Options.SchemaSimilarTo); // $1
command.AddParameter(SchemaNotSimilarTo ?? Options.SchemaNotSimilarTo); // $2
command.AddParameter(IncludeSchemas ?? Options.IncludeSchemas, true); // $3
command.AddParameter(ExcludeSchemas ?? Options.ExcludeSchemas, true); // $4
command.AddParameter(NameSimilarTo ?? Options.NameSimilarTo); // $5
command.AddParameter(NameNotSimilarTo ?? Options.NameNotSimilarTo); // $6
command.AddParameter(IncludeNames ?? Options.IncludeNames, true); // $7
command.AddParameter(ExcludeNames ?? Options.ExcludeNames, true); // $8
command.AddParameter(IncludeLanguages, true); // $9
command.AddParameter(ExcludeLanguages is null ? ["c", "internal"] : ExcludeLanguages, true); // $10
command.TraceCommand(nameof(RoutineSource));
using NpgsqlDataReader reader = command.ExecuteReaderWithRetry(retryStrategy);
while (reader.Read())
{
var type = reader.Get<string>(0);//"type");
var paramTypes = reader.Get<string[]>(14);// "param_types");
var returnType = reader.Get<string>(7);// "return_type");
var name = reader.Get<string>(2);// "name");
var volatility = reader.Get<char>(5);//"volatility_option");
var hasGet =
name.Contains("_get_", StringComparison.OrdinalIgnoreCase) ||
name.StartsWith("get_", StringComparison.OrdinalIgnoreCase) ||
name.EndsWith("_get", StringComparison.OrdinalIgnoreCase);
var crudType = hasGet ? CrudType.Select : (volatility == 'v' ? CrudType.Update : CrudType.Select);
var originalParamNames = reader.Get<string[]>(13);//"param_names");
var isVoid = string.Equals(returnType, "void", StringComparison.Ordinal);
var schema = reader.Get<string>(1);//"schema");
var returnsSet = reader.Get<bool>(6);//"returns_set");
var returnRecordNames = reader.Get<string[]>(9);//"return_record_names");
string[] convertedRecordNames = new string[returnRecordNames.Length];
for (int i = 0; i < returnRecordNames.Length; i++)
{
convertedRecordNames[i] = Options.NameConverter(returnRecordNames[i]) ?? returnRecordNames[i];
}
var returnRecordTypes = reader.Get<string[]>(10);//"return_record_types");
string[] expNames = new string[returnRecordNames.Length];
var customRecTypeNames = reader.Get<string?[]>(21); //custom_rec_type_names
if (customRecTypeNames is not null && customRecTypeNames.Length > 0)
{
var customRecTypeTypes = reader.Get<string?[]>(22); //custom_rec_type_types
for (var i = 0; i < convertedRecordNames.Length; i++)
{
var customName = customRecTypeNames[i];
if (customName is not null)
{
//expNames[i] = string.Concat("(", returnRecordNames[i], "::", returnRecordTypes[i], ").", customName);
expNames[i] = string.Concat("(", returnRecordNames[i], ").", customName);
convertedRecordNames[i] = Options.NameConverter(customName) ?? customName;
returnRecordTypes[i] = customRecTypeTypes[i] ?? returnRecordTypes[i];
}
else
{
expNames[i] = returnRecordNames[i];
}
}
}
TypeDescriptor[] returnTypeDescriptor;
if (isVoid)
{
returnTypeDescriptor = [];
}
else
{
returnTypeDescriptor = [.. returnRecordTypes.Select(x => new TypeDescriptor(x))];
}
bool isUnnamedRecord = reader.Get<bool>(11);// "is_unnamed_record");
var routineType = type.GetEnum<RoutineType>();
var callIdent = routineType == RoutineType.Procedure ? "call " : "select ";
var paramCount = reader.Get<int>(12);// "param_count");
var argumentDef = reader.Get<string>(15);
string?[] paramDefaults = new string?[paramCount];
bool[] hasParamDefaults = new bool[paramCount];
if (string.IsNullOrEmpty(argumentDef) is false)
{
const string defaultArgExp = " DEFAULT ";
var defParts = argumentDef.Split(Consts.Comma, StringSplitOptions.TrimEntries);
for (int i = 0; i < paramCount; i++)
{
string paramName = originalParamNames[i];
if (paramName is null)
{
continue;
}
if (i < defParts.Length)
{
if (defParts[i].Contains(paramName) is false)
{
continue;
}
int idx = defParts[i].IndexOf(defaultArgExp);
if (idx != -1)
{
string defaultValue = defParts[i][(idx + defaultArgExp.Length)..];
paramDefaults[i] = defaultValue;
hasParamDefaults[i] = true;
}
else
{
paramDefaults[i] = null;
hasParamDefaults[i] = false;
}
}
}
}
var returnRecordCount = reader.Get<int>(8);// "return_record_count");
var variadic = reader.Get<bool>(16);// "has_variadic");
string from;
if (isVoid || returnRecordCount == 1)
{
from = callIdent;
}
else
{
//from = string.Concat(callIdent, string.Join(",", returnRecordNames), " from ");
StringBuilder sb = new();
for (int i = 0; i < returnRecordCount; i++)
{
sb.Append(expNames[i] ?? returnRecordNames[i]);
if (i < returnRecordCount - 1)
{
sb.Append(Consts.Comma);
}
}
from = string.Concat(callIdent, sb.ToString(), " from ");
}
var expression = string.Concat(
from,
schema,
".",
name,
"(",
variadic && paramCount > 0 ? "variadic " : "");
var simpleDefinition = new StringBuilder();
simpleDefinition.AppendLine(string.Concat(
routineType.ToString().ToLower(), " ",
schema, ".",
name, "(",
paramCount == 0 ? ")" : ""));
var customTypeNames = reader.Get<string?[]>(18);
var customTypeTypes = reader.Get<string?[]>(19);
var customTypePositions = reader.Get<short?[]>(20);
NpgsqlRestParameter[] parameters = new NpgsqlRestParameter[paramCount];
bool hasCustomType = false;
if (paramCount > 0)
{
for (var i = 0; i < paramCount; i++)
{
var paramName = originalParamNames[i];
var originalParameterName = paramName;
var customTypeName = customTypeNames[i];
string? customType;
if (customTypeName != null)
{
customType = paramTypes[i];
paramTypes[i] = customTypeTypes[i] ?? customType;
paramName = string.Concat(paramName, CustomTypeParameterSeparator, customTypeName);
originalParamNames[i] = paramName;
if (hasCustomType is false)
{
hasCustomType = true;
}
}
else
{
customType = null;
}
var defaultValue = paramDefaults[i];
var paramType = paramTypes[i];
var fullParamType = defaultValue == null ? paramType : $"{paramType} DEFAULT {defaultValue}";
simpleDefinition
.AppendLine(string.Concat(" ", paramName, " ", fullParamType, i == paramCount - 1 ? "" : ","));
var convertedName = Options.NameConverter(paramName);
if (string.IsNullOrEmpty(convertedName))
{
convertedName = $"${i + 1}";
}
var descriptor = new TypeDescriptor(
paramType,
hasDefault: hasParamDefaults[i],
customType: customType,
customTypePosition: customTypePositions[i],
originalParameterName: originalParameterName,
customTypeName: customTypeName);
//parameters[i] = new NpgsqlRestParameter
//{
// Ordinal = i,
// NpgsqlDbType = descriptor.ActualDbType,
// ConvertedName = convertedName,
// ActualName = originalParameterName,
// TypeDescriptor = descriptor
//};
parameters[i] = new NpgsqlRestParameter(
ordinal: i,
convertedName: convertedName,
actualName: originalParameterName,
typeDescriptor: descriptor);
}
simpleDefinition.AppendLine(")");
}
if (!returnsSet)
{
simpleDefinition.AppendLine(string.Concat("returns ", returnType));
}
else
{
if (isUnnamedRecord)
{
simpleDefinition.AppendLine(string.Concat($"returns setof {returnType}"));
}
else
{
simpleDefinition.AppendLine("returns table(");
for (var i = 0; i < returnRecordCount; i++)
{
var returnParamName = returnRecordNames[i];
var returnParamType = returnRecordTypes[i];
simpleDefinition
.AppendLine(string.Concat(" ", returnParamName, " ", returnParamType, i == returnRecordCount - 1 ? "" : ","));
}
simpleDefinition.AppendLine(")");
}
}
IRoutineSourceParameterFormatter formatter;
if (hasCustomType is false)
{
formatter = new RoutineSourceParameterFormatter();
}
else
{
formatter = new RoutineSourceCustomTypesParameterFormatter();
}
yield return (
new Routine
{
Type = routineType,
Schema = schema,
Name = name,
Comment = reader.Get<string>(3),//"comment"),
IsStrict = reader.Get<bool>(4),//"is_strict"),
CrudType = crudType,
ReturnsRecordType = string.Equals(returnType, "record", StringComparison.OrdinalIgnoreCase),
ReturnsSet = returnsSet,
ColumnCount = returnRecordCount,
OriginalColumnNames = returnRecordNames,
ColumnNames = convertedRecordNames,
ReturnsUnnamedSet = isUnnamedRecord,
ColumnsTypeDescriptor = returnTypeDescriptor,
IsVoid = isVoid,
ParamCount = paramCount,
Parameters = parameters,
ParamsHash = [.. parameters.Select(p => p.ConvertedName)],
OriginalParamsHash = [.. parameters.Select(p => p.ActualName)],
Expression = expression,
FullDefinition = reader.Get<string>(17),//"definition"),
SimpleDefinition = simpleDefinition.ToString(),
Immutable = volatility == 'i',
Tags = [routineType.ToString().ToLowerInvariant(), volatility switch
{
'v' => "volatile",
's' => "stable",
'i' => "immutable",
_ => "other"
}],
FormatUrlPattern = null,
EndpointHandler = null,
Metadata = null
},
formatter);
}
}
finally
{
if (connection is not null && shouldDispose is true)
{
connection.Dispose();
}
}
}
}
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