Go Bot is a library used to create commands, inputs and bot services for Micro
- Commands - Commands are functions executed by the bot based on text based pattern matching.
- Inputs - Inputs are plugins for communication e.g Slack, Telegram, IRC, etc.
- Services - Write bots as micro services
Commands are functions executed by the bot based on text based pattern matching.
import "github.com/micro/go-bot/command"
func Ping() command.Command {
usage := "ping"
description := "Returns pong"
return command.NewCommand("ping", usage, desc, func(args ...string) ([]byte, error) {
return []byte("pong"), nil
})
}Add the command to the Commands map with a pattern key that can be matched by golang/regexp.Match
import "github.com/micro/go-bot/command"
func init() {
command.Commands["^ping$"] = Ping()
}Build binary
cd github.com/micro/micro
// For local use
go build -i -o micro ./main.go
// For docker image
CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-w' -i -o micro ./main.goInputs are plugins for communication e.g Slack, HipChat, XMPP, IRC, SMTP, etc, etc.
New inputs can be added in the following way.
Write an input that satisfies the Input interface.
type Input interface {
// Provide cli flags
Flags() []cli.Flag
// Initialise input using cli context
Init(*cli.Context) error
// Stream events from the input
Stream() (Conn, error)
// Start the input
Start() error
// Stop the input
Stop() error
// name of the input
String() string
}Add the input to the Inputs map.
import "github.com/micro/micro/bot/input"
func init() {
input.Inputs["name"] = MyInput
}Build binary
cd github.com/micro/micro
// For local use
go build -i -o micro ./main.go
// For docker image
CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-w' -i -o micro ./main.goThe micro bot supports the ability to create commands as micro services.
The bot watches the service registry for services with it's namespace. The default namespace is go.micro.bot.
Any service within this namespace will automatically be added to the list of available commands. When a command
is executed, the bot will call the service with method Command.Exec. It also expects the method Command.Help
to exist for usage info.
The service interface is as follows and can be found at go-bot/proto
syntax = "proto3";
package go.micro.bot;
service Command {
rpc Help(HelpRequest) returns (HelpResponse) {};
rpc Exec(ExecRequest) returns (ExecResponse) {};
}
message HelpRequest {
}
message HelpResponse {
string usage = 1;
string description = 2;
}
message ExecRequest {
repeated string args = 1;
}
message ExecResponse {
bytes result = 1;
string error = 2;
}
Here's an example echo command as a microservice
package main
import (
"fmt"
"strings"
"github.com/micro/go-micro"
"golang.org/x/net/context"
proto "github.com/micro/go-bot/proto"
)
type Command struct{}
// Help returns the command usage
func (c *Command) Help(ctx context.Context, req *proto.HelpRequest, rsp *proto.HelpResponse) error {
// Usage should include the name of the command
rsp.Usage = "echo"
rsp.Description = "This is an example bot command as a micro service which echos the message"
return nil
}
// Exec executes the command
func (c *Command) Exec(ctx context.Context, req *proto.ExecRequest, rsp *proto.ExecResponse) error {
rsp.Result = []byte(strings.Join(req.Args, " "))
// rsp.Error could be set to return an error instead
// the function error would only be used for service level issues
return nil
}
func main() {
service := micro.NewService(
micro.Name("go.micro.bot.echo"),
)
service.Init()
proto.RegisterCommandHandler(service.Server(), new(Command))
if err := service.Run(); err != nil {
fmt.Println(err)
}
}
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