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588 lines (531 loc) · 29.5 KB
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using System.Text;
using Npgsql;
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,
bool nestedJsonForCompositeTypes = false,
bool resolveNestedCompositeTypes = true) : 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 bool NestedJsonForCompositeTypes { get; set; } = nestedJsonForCompositeTypes;
/// <summary>
/// When true, nested composite types and arrays of composite types within composite fields
/// are serialized as JSON objects/arrays instead of PostgreSQL tuple strings.
/// For example, a nested composite "(1,x)" becomes {"id":1,"name":"x"}.
/// Default: true (nested composites are serialized as proper JSON objects).
/// Set to false for backwards compatibility or to reduce startup overhead for schemas
/// with thousands of composite types.
/// </summary>
public bool ResolveNestedCompositeTypes { get; set; } = resolveNestedCompositeTypes;
/// <summary>
/// The discovery command (query text + the ten filter parameters, each resolved against this source
/// or the global options) — shared by <see cref="Read"/> and <see cref="CreateFingerprintCommand"/>.
/// With <paramref name="fingerprint"/> the SAME query is wrapped in an order-independent server-side
/// hash of its result rows: if the hash changes, the discovered endpoints changed — by definition.
/// </summary>
private NpgsqlCommand CreateSourceCommand(NpgsqlConnection connection, bool fingerprint)
{
var command = connection.CreateCommand();
Query ??= RoutineSourceQuery.Query;
var text = Query.Contains(Consts.Space) is false
? string.Concat("select * from ", Query, "($1,$2,$3,$4,$5,$6,$7,$8,$9,$10)")
: Query;
command.CommandText = fingerprint
? string.Concat("select coalesce(sum(hashtextextended(q::text, 0)), 0)::text from (", text, ") q")
: text;
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
return command;
}
/// <summary>
/// A command returning one text value: a hash of this source's ENTIRE discovery result (same query,
/// same configured filters). Watch mode polls it to detect any change to the discovered endpoints —
/// routines, their comments/annotations, and the composite/table types their signatures use.
/// </summary>
public NpgsqlCommand CreateFingerprintCommand(NpgsqlConnection connection)
=> CreateSourceCommand(connection, fingerprint: true);
public IEnumerable<(Routine, IRoutineSourceParameterFormatter)> Read(IServiceProvider? serviceProvider, RetryStrategy? retryStrategy)
{
bool shouldDispose = true;
NpgsqlConnection? connection = null;
try
{
Options.CreateAndOpenSourceConnection(serviceProvider, ref connection, ref shouldDispose, nameof(RoutineSource));
if (connection is null)
{
yield break;
}
// Initialize composite type cache if deep nested type resolution is enabled
if (ResolveNestedCompositeTypes)
{
CompositeTypeCache.Initialize(connection, Options.NameConverter);
}
using var command = CreateSourceCommand(connection, fingerprint: false);
command.LogCommand(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");
var isUnnamedRecord = reader.Get<bool>(11);// "is_unnamed_record");
string[] expNames = new string[returnRecordNames.Length];
Dictionary<int, (string[] FieldNames, TypeDescriptor[] FieldDescriptors, string OriginalColumnName, int[] ExpandedColumnIndices)>? compositeColumnInfo = null;
var customRecTypeNames = reader.Get<string?[]>(21); //custom_rec_type_names
var compositeOutParamNames = reader.Get<string[]?>(23); //composite_out_param_names
if (customRecTypeNames is not null && customRecTypeNames.Length > 0)
{
var customRecTypeTypes = reader.Get<string?[]>(22); //custom_rec_type_types
// Track composite column metadata for potential nested JSON serialization
// Group fields by their original column (they share the same returnRecordNames prefix)
Dictionary<string, List<(int OriginalIndex, string FieldName, string FieldType)>>? fieldsByColumn = null;
for (var i = 0; i < convertedRecordNames.Length; i++)
{
var customName = customRecTypeNames[i];
if (customName is not null)
{
expNames[i] = string.Concat("(", returnRecordNames[i], ").", customName);
convertedRecordNames[i] = Options.NameConverter(customName) ?? customName;
returnRecordTypes[i] = customRecTypeTypes[i] ?? returnRecordTypes[i];
// Build composite metadata in single pass
fieldsByColumn ??= new();
var columnName = returnRecordNames[i];
if (!fieldsByColumn.TryGetValue(columnName, out var fieldList))
{
fieldList = new List<(int, string, string)>();
fieldsByColumn[columnName] = fieldList;
}
fieldList.Add((i, customName, customRecTypeTypes[i] ?? returnRecordTypes[i]));
}
else
{
expNames[i] = returnRecordNames[i];
}
}
if (fieldsByColumn is not null)
{
// Build composite info without LINQ allocations
compositeColumnInfo = new(fieldsByColumn.Count);
foreach (var (columnName, fields) in fieldsByColumn)
{
var count = fields.Count;
var fieldNames = new string[count];
var fieldDescriptors = new TypeDescriptor[count];
var expandedIndices = new int[count];
for (var j = 0; j < count; j++)
{
var field = fields[j];
fieldNames[j] = Options.NameConverter(field.FieldName) ?? field.FieldName;
fieldDescriptors[j] = new TypeDescriptor(field.FieldType);
expandedIndices[j] = field.OriginalIndex;
}
compositeColumnInfo[fields[0].OriginalIndex] = (
fieldNames,
fieldDescriptors,
Options.NameConverter(columnName) ?? columnName,
expandedIndices
);
}
}
}
else if (compositeOutParamNames is not null && compositeOutParamNames.Length > 0)
{
// Handle case where return is composite type with named OUT params
// e.g., returns table (req nested_request) - all columns belong to one composite
// returnRecordNames contains the composite field names, compositeOutParamNames has the column name
for (var i = 0; i < returnRecordNames.Length; i++)
{
expNames[i] = returnRecordNames[i];
}
// Group all fields under each OUT param name
// For single composite column: compositeOutParamNames = ['req'], returnRecordNames = ['id', 'text_value', 'flag']
if (compositeOutParamNames.Length == 1)
{
// All fields belong to single composite column
var columnName = compositeOutParamNames[0];
var count = returnRecordNames.Length;
var fieldNames = new string[count];
var fieldDescriptors = new TypeDescriptor[count];
var expandedIndices = new int[count];
for (var j = 0; j < count; j++)
{
fieldNames[j] = convertedRecordNames[j];
fieldDescriptors[j] = new TypeDescriptor(returnRecordTypes[j]);
expandedIndices[j] = j;
}
compositeColumnInfo = new(1)
{
[0] = (fieldNames, fieldDescriptors, Options.NameConverter(columnName) ?? columnName, expandedIndices)
};
}
}
else if (string.Equals(returnType, "record", StringComparison.OrdinalIgnoreCase) && !isUnnamedRecord && !returnsSet && returnRecordNames.Length >= 1)
{
// Handle case where function returns a named composite type directly (not via OUT params)
// e.g., CREATE FUNCTION get_single_bool_field_type() RETURNS single_bool_field_type
// In this case, returnType is "record" and all returnRecordNames belong to the composite
// We use the FROM syntax: select field1, field2 from schema.function()
// This expands the composite fields so they can be serialized individually
for (var i = 0; i < returnRecordNames.Length; i++)
{
expNames[i] = returnRecordNames[i];
}
// Note: We intentionally do NOT set compositeColumnInfo here because we want the fields
// to be serialized directly as a flat JSON object, not nested under a composite column name
}
// Read array composite type info (columns 25, 26, 27)
// These are populated when OUT params include arrays of composite types
Dictionary<int, (string[] FieldNames, TypeDescriptor[] FieldDescriptors)>? arrayCompositeColumnInfo = null;
var arrayColumnIndices = reader.Get<int[]?>(25); // array_column_indices (1-based from SQL)
if (arrayColumnIndices is not null && arrayColumnIndices.Length > 0)
{
var arrayFieldNamesJson = reader.Get<string?>(26); // array_field_names_json (JSON string)
var arrayFieldTypesJson = reader.Get<string?>(27); // array_field_types_json (JSON string)
if (arrayFieldNamesJson is not null && arrayFieldTypesJson is not null)
{
// Parse JSON arrays: [["field1","field2"],["field1","field2"]]
var arrayFieldNames = System.Text.Json.JsonSerializer.Deserialize(arrayFieldNamesJson, NpgsqlRestSerializerContext.Default.StringArrayArray);
var arrayFieldTypes = System.Text.Json.JsonSerializer.Deserialize(arrayFieldTypesJson, NpgsqlRestSerializerContext.Default.StringArrayArray);
if (arrayFieldNames is not null && arrayFieldTypes is not null)
{
arrayCompositeColumnInfo = new(arrayColumnIndices.Length);
for (var i = 0; i < arrayColumnIndices.Length; i++)
{
var colIndex = arrayColumnIndices[i] - 1; // Convert to 0-based
var fieldNames = arrayFieldNames[i];
var fieldTypes = arrayFieldTypes[i];
var convertedFieldNames = new string[fieldNames.Length];
var fieldDescriptors = new TypeDescriptor[fieldNames.Length];
for (var j = 0; j < fieldNames.Length; j++)
{
convertedFieldNames[j] = Options.NameConverter(fieldNames[j]) ?? fieldNames[j];
fieldDescriptors[j] = new TypeDescriptor(fieldTypes[j]);
// Resolve nested composite types if option is enabled
if (ResolveNestedCompositeTypes)
{
ResolveNestedTypesForDescriptor(fieldDescriptors[j]);
}
}
arrayCompositeColumnInfo[colIndex] = (convertedFieldNames, fieldDescriptors);
}
}
}
}
TypeDescriptor[] returnTypeDescriptor;
if (isVoid)
{
returnTypeDescriptor = [];
}
else
{
returnTypeDescriptor = [.. returnRecordTypes.Select(x => new TypeDescriptor(x))];
}
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 = returnRecordNames.Length; // Use actual array length (may have changed for nested JSON)
var variadic = reader.Get<bool>(16);// "has_variadic");
string from;
// When function returns a named composite type (returnType == "record" but not unnamed),
// we need field expansion via FROM syntax even when there's only one field,
// otherwise PostgreSQL returns the composite representation like "(value)"
bool hasNamedCompositeReturn = string.Equals(returnType, "record", StringComparison.OrdinalIgnoreCase) && !isUnnamedRecord;
if (isVoid || (returnRecordCount == 1 && !hasNamedCompositeReturn))
{
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);
// For an expanded composite field, ActualName stays the shared base
// (originalParameterName, e.g. "_response"); record the unique per-field name
// (paramName, e.g. "_response_body") as an alias so annotations that reference
// the name shown in the signature (e.g. @body_parameter_name) still resolve.
if (customTypeName != null)
{
parameters[i].ExpandedName = paramName;
}
}
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();
}
string[] jsonColumnNames = new string[convertedRecordNames.Length];
for (int i = 0; i < convertedRecordNames.Length; i++)
{
jsonColumnNames[i] = PgConverters.SerializeString(convertedRecordNames[i]);
}
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,
JsonColumnNames = jsonColumnNames,
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,
CompositeColumnInfo = compositeColumnInfo,
ArrayCompositeColumnInfo = arrayCompositeColumnInfo
},
formatter);
}
}
finally
{
if (connection is not null && shouldDispose is true)
{
connection.Dispose();
}
}
}
/// <summary>
/// Resolves nested composite type metadata for a field descriptor.
/// Looks up the field type in the CompositeTypeCache and populates
/// nested field names and descriptors if the field is a composite type.
/// </summary>
private static void ResolveNestedTypesForDescriptor(TypeDescriptor descriptor)
{
// Check if this is a composite type
var compositeMetadata = CompositeTypeCache.GetType(descriptor.OriginalType);
if (compositeMetadata != null)
{
descriptor.CompositeFieldNames = compositeMetadata.ConvertedFieldNames;
descriptor.CompositeFieldDescriptors = compositeMetadata.FieldDescriptors;
return;
}
// Check if this is an array of composite types
if (descriptor.IsArray)
{
var elementMetadata = CompositeTypeCache.GetArrayElementType(descriptor.OriginalType);
if (elementMetadata != null)
{
descriptor.ArrayCompositeFieldNames = elementMetadata.ConvertedFieldNames;
descriptor.ArrayCompositeFieldDescriptors = elementMetadata.FieldDescriptors;
}
}
}
}
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