Refactor parsing & select order by impl (#6)

Reviewed-on: #6

orm.go

@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"git.gdulai.com/gdulai/simpleorm/cache"
-	"git.gdulai.com/gdulai/simpleorm/parser"
 	"git.gdulai.com/gdulai/simpleorm/schema"
 
 	log "gitlab.com/gdulai/simpleloglvl"
@@ -21,28 +20,39 @@ type ORM struct {
 // Inits the ORM library.
 // Param objs is an array which should be an array of the types which describe the tables.
 func NewORM(objs ...any) *ORM {
-	var parsers []*parser.Parser
-	var tables []*schema.Table
+	typeParsers := make(map[string]*schema.Parser)
+
+	log.LogDebug("[ORM] Parsing entities to tables...")
+	log.LogDebug("[ORM] Step 1: Parsing table columns")
 	for _, obj := range objs {
-		log.LogDebug("[ORM] Mapping type for: %s", reflect.TypeOf(obj).Name())
-		parser := parser.NewParser(obj)
-		parsers = append(parsers, parser)
-		tables = append(tables, parser.ParseColumns())
+		typ := reflect.TypeOf(obj)
+		log.LogDebug("[ORM] Mapping type for: %s", typ.Name())
+
+		parser := schema.NewParser(obj)
+		parser.ParseColumns()
+
+		typeParsers[typ.Name()] = parser
 	}
 
-	log.LogDebug("[ORM] Tables initiated, creating cache.")
+	log.LogDebug("[ORM] Step 1: Finished parsing columns!")
+	log.LogDebug("[ORM] Step 2: Parsing constraints...")
+
+	for _, parser := range typeParsers {
+		parser.ParseConstraints(typeParsers)
+	}
+
+	log.LogDebug("[ORM] Step 2: Finished parsing contraints!")
+	log.LogDebug("[ORM] Step 3: Creating and caching schema...")
+
+	var tables []*schema.Table
+	for _, parser := range typeParsers {
+		tables = append(tables, parser.ParseTable())
+	}
 
 	// Create cache with the initialized tables
 	cache := cache.NewSchemaCache(tables)
 
-	log.LogDebug("[ORM] Cache created.")
-
-	// Finish the parsing with the constraints and add the to the tables
-	for _, parser := range parsers {
-		log.LogDebug("[ORM] Parsing constraing for: %s", parser.Table.Name)
-		parser.ParseConstraints(cache)
-		log.LogDebug("[ORM] Parsed constraints for: %s", parser.Table.Name)
-	}
+	log.LogDebug("[ORM] Step 3: Cache created.")
 
 	return &ORM{cache: cache}
 }