godb/internals/repl/repl.go

package repl

import (
	"fmt"
	"strings"

	. "godb/internals/buffer"
	. "godb/internals/vm"
)

func PrintConsole() {
	fmt.Print("godb > ")
}

func Run() {

	inputBuffer := NewInputBuffer()
	statement := NewStatement()
	table := NewTable()
	for {
		PrintConsole()
		inputBuffer.ReadConsole()
		if len(inputBuffer.Buffer) > 0 && strings.HasPrefix(inputBuffer.Buffer, ".") {
			switch DoMetaCommands(inputBuffer) {
			case MetaCommandSuccess:
				continue
			case MetaCommandUnrecognised:
				fmt.Printf("unrecognised command %v\n", inputBuffer.Buffer)
				continue
			}
		}

		switch statement.PrepareStatements(inputBuffer) {
		case PrepareSuccess:
			//todo
		case PrepareUnrecognised:
			fmt.Printf("Unrecognised keyword at the start of '%s'.\n", inputBuffer.Buffer)
			continue
		}

		switch statement.ExecuteStatement(table) {
		case ExecuteSuccess:
			fmt.Println("Executed.")
		case ExecuteTableFull:
			fmt.Println("Error: Table is full")
		}

	}
}