Step by Step Guide to Building a Mailparser API Integration in Go

Aug 13, 2024 • 6 minute read

Introduction

Hey there, fellow Go enthusiast! Ready to supercharge your email parsing game? Let's dive into building a Mailparser API integration using Go. We'll be leveraging the awesome github.com/windvalley/go-mailparser package to make our lives easier. Buckle up, and let's get coding!

Prerequisites

Before we jump in, make sure you've got:

Go installed on your machine (you're a Go dev, so I'm sure you've got this covered!)
A Mailparser account and API key (if you don't have one, hop over to their website and grab it)

Setting up the project

Let's kick things off by creating a new Go module:

mkdir mailparser-integration && cd mailparser-integration
go mod init mailparser-integration

Now, let's grab the go-mailparser package:

go get github.com/windvalley/go-mailparser

Initializing the Mailparser client

Time to get our hands dirty! First, let's import the package and create a new client:

package main

import (
    "fmt"
    "github.com/windvalley/go-mailparser"
)

func main() {
    client := mailparser.NewClient("YOUR_API_KEY")
    // We're ready to rock!
}

Implementing core functionalities

Now for the fun part - let's implement some core Mailparser functionalities:

Fetching parsed results

results, err := client.GetParsedResults("INBOX_ID", nil)
if err != nil {
    // Handle error
}
fmt.Println(results)

Creating a new inbox

inbox, err := client.CreateInbox("My Awesome Inbox")
if err != nil {
    // Handle error
}
fmt.Printf("New inbox created with ID: %s\n", inbox.ID)

Updating inbox settings

settings := &mailparser.InboxSettings{
    Name: "Updated Inbox Name",
}
updatedInbox, err := client.UpdateInbox("INBOX_ID", settings)
if err != nil {
    // Handle error
}
fmt.Println(updatedInbox)

Deleting an inbox

err := client.DeleteInbox("INBOX_ID")
if err != nil {
    // Handle error
}
fmt.Println("Inbox deleted successfully")

Error handling and best practices

Always check for errors, folks! It's Go 101. Also, keep an eye on those rate limits - Mailparser might get grumpy if you hammer their API too hard.

Building a simple CLI tool

Let's wrap this up in a neat little CLI package:

package main

import (
    "flag"
    "fmt"
    "github.com/windvalley/go-mailparser"
    "os"
)

func main() {
    apiKey := flag.String("api-key", "", "Mailparser API key")
    action := flag.String("action", "", "Action to perform (fetch|create|update|delete)")
    inboxID := flag.String("inbox-id", "", "Inbox ID")
    flag.Parse()

    if *apiKey == "" {
        fmt.Println("API key is required")
        os.Exit(1)
    }

    client := mailparser.NewClient(*apiKey)

    switch *action {
    case "fetch":
        // Implement fetch logic
    case "create":
        // Implement create logic
    case "update":
        // Implement update logic
    case "delete":
        // Implement delete logic
    default:
        fmt.Println("Invalid action")
        os.Exit(1)
    }
}

Testing the integration

Don't forget to write some unit tests! And give it a whirl with some real API calls to make sure everything's working smoothly.

Conclusion

And there you have it! You've just built a slick Mailparser API integration in Go. Pretty cool, right? Feel free to expand on this foundation - maybe add some more advanced features or beef up the error handling.

Resources

Now go forth and parse those emails like a pro! Happy coding!