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email.go
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email.go
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package client
import (
"context"
"encoding/json"
"errors"
email "github.com/microapis/email-api"
"github.com/microapis/messages-core/message"
"github.com/microapis/messages-core/proto"
"google.golang.org/grpc"
)
// Client ...
type Client struct {
Client proto.SchedulerServiceClient
}
// New ...
func New(address string) (*Client, error) {
conn, err := grpc.Dial(address, grpc.WithInsecure())
if err != nil {
return nil, err
}
c := proto.NewSchedulerServiceClient(conn)
return &Client{
Client: c,
}, nil
}
// Send ...
func (c *Client) Send(e *email.Message, delay int64) (string, error) {
// validates email existence
if e == nil {
return "", errors.New("invalid email")
}
// validates email params
// TODO(ca): check how verify e.Text, e.HTML, e.ReplyTo and e.Status
if e.From == "" || e.FromName == "" || e.To[0] == "" || e.Subject == "" || e.Provider == "" {
return "", errors.New("invalid email params")
}
// validates delay param
if delay < 0 {
return "", errors.New("invalid delay")
}
// pase email struct
b, err := json.Marshal(e)
if err != nil {
return "", err
}
e.Status = message.Pending
gr, err := c.Client.Put(context.Background(), &proto.MessagePutRequest{
Channel: email.Channel,
Provider: e.Provider,
Content: string(b),
Delay: delay,
})
if err != nil {
return "", err
}
msg := gr.GetError().GetMessage()
if msg != "" {
return "", errors.New(msg)
}
data := gr.GetData()
id := data.GetId()
return id, nil
}
// Get ...
func (c *Client) Get(ID string) (*email.Message, error) {
// validates id param
if ID == "" {
return nil, errors.New("invalid ID")
}
gr, err := c.Client.Get(context.Background(), &proto.MessageGetRequest{
Id: ID,
})
if err != nil {
return nil, err
}
msg := gr.GetError().GetMessage()
if msg != "" {
return nil, errors.New(msg)
}
data := gr.GetData()
provider := data.GetProvider()
content := data.GetContent()
status := data.GetStatus()
m := &email.Message{}
err = json.Unmarshal([]byte(content), m)
if err != nil {
return nil, err
}
m.Provider = provider
m.Status = status
return m, nil
}
// Update ...
func (c *Client) Update(ID string, e *email.Message) error {
// validates email existence
if e == nil {
return errors.New("invalid email")
}
// validates email params
// TODO(ca): check how verify e.Text, e.HTML, e.ReplyTo and e.Status
if e.From == "" || e.FromName == "" || e.To[0] == "" || e.Subject == "" || e.Provider == "" {
return errors.New("invalid email params")
}
// pase email struct
b, err := json.Marshal(e)
if err != nil {
return err
}
gr, err := c.Client.Update(context.Background(), &proto.MessageUpdateRequest{
Id: ID,
Content: string(b),
})
if err != nil {
return err
}
msg := gr.GetError().GetMessage()
if msg != "" {
return errors.New(msg)
}
return nil
}
// Cancel ...
func (c *Client) Cancel(ID string) error {
// validates id param
if ID == "" {
return errors.New("invalid ID")
}
gr, err := c.Client.Cancel(context.Background(), &proto.MessageCancelRequest{
Id: ID,
})
if err != nil {
return err
}
msg := gr.GetError().GetMessage()
if msg != "" {
return errors.New(msg)
}
if err != nil {
return err
}
return nil
}