First attempt at configuration for code generation.

src/pglab/CodeBuilderConfiguration.h

@@ -0,0 +1,120 @@
+#pragma once
+
+#include <QString>
+#include <QStringBuilder>
+#include <libpq-fe.h>
+
+namespace Pgsql { class Result; }
+
+/*
+class PgAuthId {
+public:
+	PgAuthId();
+
+	Oid oid = InvalidOid;
+	QString name;
+	bool super;
+	bool inherit;
+	bool createRole;
+	bool createDB;
+	bool canlogin;
+	bool replication;
+	bool bypassRls;
+	int connLimit;
+	QDateTime validUntil;*/
+
+/** Defines how a database result fieldname should be converted into a variable
+ * name in the target language.
+ * 
+ */
+class VarNameManglingRules {
+public:
+    enum class CollisionHandling {
+        Restrict, ///< An error will be reported and no code generated
+        Fqn, ///< Turn into fully qualified name (table_column)
+        Number ///< A number will be appended to fields that have the same name
+    };
+    
+    enum class CaseConversion {
+        AsIs,
+        Upper,
+        Lower        
+    };
+
+    QString replaceSpaceWith; ///< default is empty string which means remove spaces
+    CollisionHandling CollisionHandling = CollisionHandling::Restrict;
+    CaseConversion caseConversion = CaseConversion::AsIs; ///< overall case conversion rule
+    CaseConversion caseFirstChar = CaseConversion::AsIs; ///< case of the first char
+    bool underscoreToCamel = false; ///< remove underscores and make first char after underscore uppercase   
+};
+/**
+ * 
+ */
+class LanguageConfig {
+public:
+    /** Default template for declaring a variable of the correct type.
+     * exmaple: "{$type} {$varname};"
+     */
+    QString varDeclTemplate; 
+    VarNameManglingRules varNaming;
+    
+    enum class VariableStrategy {
+        UseLocalVariables,
+        DeclareClass
+    };
+    
+    QString classStartTemplate;
+    QString classEndTemplate;
+    QString classFieldTemplate;
+};
+
+/** 
+ * 
+ * There are some default fallbacks in place
+ * - smallint > integer
+ * - integer > bigint
+ * - int2 > smallint
+ * - int4 > integer
+ * - int8 > bigint
+ * 
+ * - float > double
+ * - text > varchar
+ */
+class TypeConfig {
+public:
+    /** The following template allows you to derive the variable name from the result fieldname.
+     * 
+     * {$} in the suplied value will be replaced with the name of the result field. 
+     * 
+     * example: {$}
+     */
+    QString varNameTemplate; 
+    QString typeIdent;
+    QString varDeclTemplate; ///< Overrules the default template in the language config
+    
+//     Mapping() = default;
+//     Mapping(Oid oid, QString lang_type_ident)
+//         : db_oid(oid), lang_type(lang_type_ident)
+//         {}
+//         
+//     bool operator < (const Mapping &rhs) const
+//     {
+//         return db_oid < rhs.db_oid;
+//     }
+    
+};
+
+class TypeMappings {
+public:
+    
+private:
+};
+
+class CodeBuilderConfiguration {
+public:
+};
+
+class CodeBuilder {
+public:    
+    QString GenClassDefinition(const Pgsql::Result &result) const;
+};