feat: split into code for buffer and vm

cmd/godb/main.go

@@ -1,112 +1,9 @@
 package main
 
 import (
-	"fmt"
-	"os"
-	"strings"
-
-	. "godb/internals/repl"
+	"godb/internals/repl"
 )
 
-type metaCommandResults int
-
-const (
-	metaCommandSuccess metaCommandResults = iota
-	metaCommandUnrecognised
-)
-
-type prepareResults int
-
-const (
-	prepareSuccess prepareResults = iota
-	prepareUnrecognised
-	prepareSyntaxError
-)
-
-type statementType int
-
-const (
-	statementSelect statementType = iota
-	statementInsert
-)
-
-type row struct {
-	id       uint
-	username string
-	email    string
-}
-
-type statement struct {
-	stype statementType
-	row   row
-}
-
-func doMetaCommands(inputBuffer *InputBuffer) metaCommandResults {
-	metacommand := metaCommandUnrecognised
-	if inputBuffer.Buffer == ".exit" {
-		fmt.Println("bye!")
-		os.Exit(0)
-	} else {
-		metacommand = metaCommandUnrecognised
-	}
-	return metacommand
-}
-
-func prepareStatements(inputBuffer *InputBuffer, statement *statement) prepareResults {
-	if strings.HasPrefix(inputBuffer.Buffer, "insert") {
-		argsAssigned, err := fmt.Sscanf(inputBuffer.Buffer, "insert %d %s %s", &statement.row.id, &statement.row.username, &statement.row.email)
-		if err != nil {
-			fmt.Println("error parsing insert statement")
-			fmt.Println(err.Error())
-		}
-		if argsAssigned > 3 {
-			return prepareSyntaxError
-		}
-		statement.stype = statementInsert
-		return prepareSuccess
-	}
-	if strings.HasPrefix(inputBuffer.Buffer, "select") {
-		statement.stype = statementSelect
-		return prepareSuccess
-	}
-	return prepareUnrecognised
-}
-
-func executeStatement(statement *statement) {
-	switch statement.stype {
-	case statementInsert:
-		fmt.Println("This is where the logic of insert statement should go")
-	case statementSelect:
-		fmt.Println("This is where the logic of select statement should go")
-	}
-}
-
 func main() {
-	inputBuffer := NewInputBuffer()
-	statement := statement{0, row{0, "", ""}}
-	for {
-		PrintConsole()
-		inputBuffer.ReadConsole()
-		if strings.HasPrefix(inputBuffer.Buffer, ".") {
-			switch doMetaCommands(inputBuffer) {
-			case metaCommandSuccess:
-				continue
-			case metaCommandUnrecognised:
-				fmt.Printf("unrecognised comma%v\n", inputBuffer.Buffer)
-				continue
-			}
-		}
-
-		switch prepareStatements(inputBuffer, &statement) {
-		case prepareSuccess:
-			//todo
-		case prepareUnrecognised:
-			fmt.Printf("Unrecognised keyword at the start of '%s'.\n", inputBuffer.Buffer)
-			continue
-		}
-
-		executeStatement(&statement)
-		fmt.Println("Executed")
-
-	}
+	repl.Run()
 }