58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
package imap
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import (
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"errors"
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"strings"
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)
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// A value that can be converted to a command.
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type Commander interface {
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Command() *Command
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}
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// A command.
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type Command struct {
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// The command tag. It acts as a unique identifier for this command. If empty,
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// the command is untagged.
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Tag string
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// The command name.
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Name string
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// The command arguments.
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Arguments []interface{}
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}
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// Implements the Commander interface.
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func (cmd *Command) Command() *Command {
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return cmd
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}
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func (cmd *Command) WriteTo(w *Writer) error {
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tag := cmd.Tag
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if tag == "" {
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tag = "*"
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}
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fields := []interface{}{RawString(tag), RawString(cmd.Name)}
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fields = append(fields, cmd.Arguments...)
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return w.writeLine(fields...)
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}
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// Parse a command from fields.
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func (cmd *Command) Parse(fields []interface{}) error {
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if len(fields) < 2 {
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return errors.New("imap: cannot parse command: no enough fields")
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}
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var ok bool
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if cmd.Tag, ok = fields[0].(string); !ok {
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return errors.New("imap: cannot parse command: invalid tag")
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}
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if cmd.Name, ok = fields[1].(string); !ok {
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return errors.New("imap: cannot parse command: invalid name")
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}
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cmd.Name = strings.ToUpper(cmd.Name) // Command names are case-insensitive
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cmd.Arguments = fields[2:]
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return nil
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}
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