config Package

Overview

The config package provides a set of functions for working with JSON configuration files. It offers methods to retrieve different types of data (string, int, float, bool, etc.) from a JSON key. This is useful for applications that need to read and manage configurations stored in JSON format.

Installation

To install the config package, use the following command:

go get github.com/jgolang/config

Usage

Here’s a basic example of how to use the config package:

package main

import (
    "fmt"
    "log"
    "github.com/jgolang/config"
)

func main() {
    err := config.LoadConfigFile("config.json")
    if err != nil {
        log.Fatalf("Failed to open config file: %v", err)
    }

    appName := config.GetString("app.name")
    port := config.GetInt("server.port")
    debugMode := config.GetBool("debug")

    fmt.Printf("App Name: %s\n", appName)
    fmt.Printf("Port: %d\n", port)
    fmt.Printf("Debug Mode: %t\n", debugMode)
}

Functions

The config package provides several functions to retrieve data from a JSON configuration file.

GetString

func GetString(key string) string

Gets a string JSON node from a JSON key.

• key: The JSON key (e.g., foo.bar).
• Returns: The string value associated with the JSON key.

GetInt64

func GetInt64(key string) int64

Gets an integer 64 JSON node from a JSON key.

• key: The JSON key (e.g., foo.bar).
• Returns: The int64 value associated with the JSON key.

GetInt

func GetInt(key string) int

Gets an integer JSON node from a JSON key.

• key: The JSON key (e.g., foo.bar).
• Returns: The int value associated with the JSON key.

GetFloat64

func GetFloat64(key string) float64

Gets a float 64 JSON node from a JSON key.

• key: The JSON key (e.g., foo.bar).
• Returns: The float64 value associated with the JSON key.

GetBool

func GetBool(key string) bool

Gets a boolean JSON node from a JSON key.

• key: The JSON key (e.g., foo.bar).
• Returns: The boolean value associated with the JSON key.

Get

func Get(key string) interface{}

Gets a JSON node from a JSON key.

• key: The JSON key (e.g., foo.bar).
• Returns: The value associated with the JSON key as an interface{}.

GetArrayMaps

func GetArrayMaps(key string) []map[string]interface{}

Gets an array JSON node from a JSON key. Returns a JSON array as a map.

• key: The JSON key (e.g., foo.bar).
• Returns: The JSON array as a slice of maps.

LoadConfigFile

func LoadConfigFile(name string) error

Opens a file that contains a JSON object.

• name: The name of the JSON file.
• Returns: An error if the file cannot be opened.

Example

Here’s an example configuration file (config.json):

{
    "app": {
        "name": "MyApp"
    },
    "server": {
        "port": 8080
    },
    "debug": true
}

Using the configuration file:

package main

import (
    "fmt"
    "log"
    "github.com/jgolang/config"
)

func main() {
    err := config.LoadConfigFile("config.json")
    if err != nil {
        log.Fatalf("Failed to open config file: %v", err)
    }

    appName := config.GetString("app.name")
    port := config.GetInt("server.port")
    debugMode := config.GetBool("debug")

    fmt.Printf("App Name: %s\n", appName)
    fmt.Printf("Port: %d\n", port)
    fmt.Printf("Debug Mode: %t\n", debugMode)
}

This example demonstrates how to open a configuration file and retrieve different types of data from it using the config package.

Contributing

If you have suggestions for how We could be improved, or want to report a bug, open an issue! We'd love all and any contributions.

For more, check out the Contributing Guide.

License

This project is licensed under the MIT License.

Support

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Thank you for your support!