Example #1
0
File: repl.go Project: ZSIT/cayley
func Repl(ts graph.TripleStore, queryLanguage string, cfg *config.Config) {
	var ses graph.Session
	switch queryLanguage {
	case "sexp":
		ses = sexp.NewSession(ts)
	case "mql":
		ses = mql.NewSession(ts)
	case "gremlin":
		fallthrough
	default:
		ses = gremlin.NewSession(ts, cfg.GremlinTimeout, true)
	}
	inputBf := bufio.NewReader(os.Stdin)
	line := ""
	for {
		if line == "" {
			fmt.Print("cayley> ")
		} else {
			fmt.Print("...       ")
		}
		l, pre, err := inputBf.ReadLine()
		if err == io.EOF {
			if line != "" {
				line = ""
			} else {
				break
			}
		}
		if err != nil {
			line = ""
		}
		if pre {
			panic("Line too long")
		}
		line += string(l)
		if line == "" {
			continue
		}
		if strings.HasPrefix(line, ":debug") {
			ses.ToggleDebug()
			fmt.Println("Debug Toggled")
			line = ""
			continue
		}
		if strings.HasPrefix(line, ":a") {
			var tripleStmt = line[3:]
			triple := nquads.Parse(tripleStmt)
			if triple == nil {
				fmt.Println("Not a valid triple.")
				line = ""
				continue
			}
			ts.AddTriple(triple)
			line = ""
			continue
		}
		if strings.HasPrefix(line, ":d") {
			var tripleStmt = line[3:]
			triple := nquads.Parse(tripleStmt)
			if triple == nil {
				fmt.Println("Not a valid triple.")
				line = ""
				continue
			}
			ts.RemoveTriple(triple)
			line = ""
			continue
		}
		result, err := ses.InputParses(line)
		switch result {
		case graph.Parsed:
			Run(line, ses)
			line = ""
		case graph.ParseFail:
			fmt.Println("Error: ", err)
			line = ""
		case graph.ParseMore:
		default:
		}
	}
}
Example #2
0
func Repl(ts graph.TripleStore, queryLanguage string, cfg *config.Config) error {
	var ses query.Session
	switch queryLanguage {
	case "sexp":
		ses = sexp.NewSession(ts)
	case "mql":
		ses = mql.NewSession(ts)
	case "gremlin":
		fallthrough
	default:
		ses = gremlin.NewSession(ts, cfg.Timeout, true)
	}
	buf := bufio.NewReader(os.Stdin)
	var line []byte
	for {
		if len(line) == 0 {
			fmt.Print("cayley> ")
		} else {
			fmt.Print("...       ")
		}
		l, prefix, err := buf.ReadLine()
		if err == io.EOF {
			if len(line) != 0 {
				line = line[:0]
			} else {
				return nil
			}
		}
		if err != nil {
			line = line[:0]
		}
		if prefix {
			return errors.New("line too long")
		}
		line = append(line, l...)
		if len(line) == 0 {
			continue
		}
		line = bytes.TrimSpace(line)
		if len(line) == 0 || line[0] == '#' {
			line = line[:0]
			continue
		}
		if bytes.HasPrefix(line, []byte(":debug")) {
			ses.ToggleDebug()
			fmt.Println("Debug Toggled")
			line = line[:0]
			continue
		}
		if bytes.HasPrefix(line, []byte(":a")) {
			var tripleStmt = line[3:]
			triple, err := cquads.Parse(string(tripleStmt))
			if !triple.IsValid() {
				if err != nil {
					fmt.Printf("not a valid triple: %v\n", err)
				}
				line = line[:0]
				continue
			}
			ts.AddTriple(triple)
			line = line[:0]
			continue
		}
		if bytes.HasPrefix(line, []byte(":d")) {
			var tripleStmt = line[3:]
			triple, err := cquads.Parse(string(tripleStmt))
			if !triple.IsValid() {
				if err != nil {
					fmt.Printf("not a valid triple: %v\n", err)
				}
				line = line[:0]
				continue
			}
			ts.RemoveTriple(triple)
			line = line[:0]
			continue
		}
		result, err := ses.InputParses(string(line))
		switch result {
		case query.Parsed:
			Run(string(line), ses)
			line = line[:0]
		case query.ParseFail:
			fmt.Println("Error: ", err)
			line = line[:0]
		case query.ParseMore:
		}
	}
}
Example #3
0
func Repl(ts graph.TripleStore, queryLanguage string, cfg *config.Config) error {
	var ses query.Session
	switch queryLanguage {
	case "sexp":
		ses = sexp.NewSession(ts)
	case "mql":
		ses = mql.NewSession(ts)
	case "gremlin":
		fallthrough
	default:
		ses = gremlin.NewSession(ts, cfg.Timeout, true)
	}

	term, err := terminal(history)
	if os.IsNotExist(err) {
		fmt.Printf("creating new history file: %q\n", history)
	}
	defer persist(term, history)

	var (
		prompt = ps1

		code string
	)

	for {
		if len(code) == 0 {
			prompt = ps1
		} else {
			prompt = ps2
		}
		line, err := term.Prompt(prompt)
		if err != nil {
			if err == io.EOF {
				return nil
			}
			return err
		}

		term.AppendHistory(line)

		line = strings.TrimSpace(line)
		if len(line) == 0 || line[0] == '#' {
			continue
		}

		if code == "" {
			switch {
			case strings.HasPrefix(line, ":debug"):
				ses.ToggleDebug()
				fmt.Println("Debug Toggled")
				continue

			case strings.HasPrefix(line, ":a"):
				triple, err := cquads.Parse(line[3:])
				if !triple.IsValid() {
					if err != nil {
						fmt.Printf("not a valid triple: %v\n", err)
					}
					continue
				}
				ts.AddTriple(triple)
				continue

			case strings.HasPrefix(line, ":d"):
				triple, err := cquads.Parse(line[3:])
				if !triple.IsValid() {
					if err != nil {
						fmt.Printf("not a valid triple: %v\n", err)
					}
					continue
				}
				ts.RemoveTriple(triple)
				continue
			}
		}

		code += line

		result, err := ses.InputParses(code)
		switch result {
		case query.Parsed:
			Run(code, ses)
			code = ""
		case query.ParseFail:
			fmt.Println("Error: ", err)
			code = ""
		case query.ParseMore:
		}
	}
}