Database Adapter Functions for blog API

db.go

package main

import (
        "fmt"
        "time"
        "encoding/json"
        "strconv"
	
        "github.com/garyburd/redigo/redis"
)

var currentPostId int
var currentUserId int

func RedisConnect() redis.Conn {
	c, err := redis.Dial("tcp", ":6379")
	HandleError(err)
	return c
}

// Give us some seed data
func init() {
	CreatePost(Post{
		User: User{
			Username: "pieohpah",
			Email: "[email protected]",
		},
		Topic: "My First Post",
		Text: "Hello everyone! This is awesome.",
	})
	
	CreatePost(Post{
		User: User{
			Username: "IronMan",
			Email: "[email protected]",
		},
		Topic: "My Fight with Thor Today",
		Text: "This is the third time I beat him.",
	})
}

func FindAll() Posts {
	
	var posts Post

	c := RedisConnect()
	defer c.Close()
	
	keys, err := c.Do("KEYS", "post:*")
	HandleError(err)
	
	for _, k := range keys.([]interface{}) {
		
		var post Post
		
		reply, err := c.Do("GET", k.([]byte))
		HandleError(err)
		
		if err := json.Unmarshal(reply.([]byte), &post); err != nil {
			panic(err)
		}
		posts = append(posts, post)
	}
	return posts
}

func FindPost(id int) Post {
	
	var post Post

	c := RedisConnect()
	defer c.Close()
	
	reply, err := c.Do("GET", "post:" + strconv.Itoa(id))
	HandleError(err)
	
	fmt.Println("GET OK")
	
	if err = json.Unmarshal(reply.([]byte), &post); err != nil {
		panic(err)
	}
	return post
}

func CreatePost(p Post) {
	
	currentPostId += 1
	currentUserId += 1
	
	p.Id = currentPostId
	p.User.Id = currentUserId
	p.Timestamp = time.Now()
	
	c := RedisConnect()
	defer c.Close()
	
	b, err := json.Marshal(p)
	HandleError(err)
	
	// Save JSON blob to Redis
	reply, err := c.Do("SET", "post:" + strconv.Itoa(p.Id), b)
	HandleError(err)
	
	fmt.Println("GET ", reply)
}