feat(templ): ✨ added templ to command line that reads go template and outputs code

pkg/commontypes/csharp.go

@@ -0,0 +1,74 @@
+package commontypes
+
+import "strings"
+
+// CSharpTypeMap maps PostgreSQL types to C# types
+var CSharpTypeMap = map[string]string{
+	// Integer types
+	"integer":     "int",
+	"int":         "int",
+	"int4":        "int",
+	"smallint":    "short",
+	"int2":        "short",
+	"bigint":      "long",
+	"int8":        "long",
+	"serial":      "int",
+	"bigserial":   "long",
+	"smallserial": "short",
+
+	// String types
+	"text":      "string",
+	"varchar":   "string",
+	"char":      "string",
+	"character": "string",
+	"citext":    "string",
+	"bpchar":    "string",
+	"uuid":      "Guid",
+
+	// Boolean
+	"boolean": "bool",
+	"bool":    "bool",
+
+	// Float types
+	"real":             "float",
+	"float4":           "float",
+	"double precision": "double",
+	"float8":           "double",
+	"numeric":          "decimal",
+	"decimal":          "decimal",
+
+	// Date/Time types
+	"timestamp":                   "DateTime",
+	"timestamp without time zone": "DateTime",
+	"timestamp with time zone":    "DateTimeOffset",
+	"timestamptz":                 "DateTimeOffset",
+	"date":                        "DateTime",
+	"time":                        "TimeSpan",
+	"time without time zone":      "TimeSpan",
+	"time with time zone":         "DateTimeOffset",
+	"timetz":                      "DateTimeOffset",
+
+	// Binary
+	"bytea": "byte[]",
+
+	// JSON
+	"json":  "string",
+	"jsonb": "string",
+}
+
+// SQLToCSharp converts SQL types to C# types
+func SQLToCSharp(sqlType string, nullable bool) string {
+	baseType := ExtractBaseType(sqlType)
+
+	csType, ok := CSharpTypeMap[baseType]
+	if !ok {
+		csType = "object"
+	}
+
+	// Handle nullable value types (reference types are already nullable)
+	if !nullable && csType != "string" && !strings.HasSuffix(csType, "[]") && csType != "object" {
+		return csType + "?"
+	}
+
+	return csType
+}