From 9eddb7da321753d65cc508f279433a8df5a85c1b Mon Sep 17 00:00:00 2001
From: SwayKh <khatrisumit712@gmail.com>
Date: Sun, 8 Sep 2024 23:01:30 +0530
Subject: [PATCH] Create a Config package, that handles initialising a basic
 empty config, loading the config for use in other pacakge.

Will add function to append data to the record field in yaml config
---
 go.mod               |   2 +
 go.sum               |   3 ++
 pkg/config/config.go | 102 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 107 insertions(+)
 create mode 100644 go.sum
 create mode 100644 pkg/config/config.go

diff --git a/go.mod b/go.mod
index c1eaa43..0ab8313 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
 module github.com/SwayKh/linksym
 
 go 1.23.0
+
+require gopkg.in/yaml.v3 v3.0.1 // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..4bc0337
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,3 @@
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/pkg/config/config.go b/pkg/config/config.go
new file mode 100644
index 0000000..af4fe33
--- /dev/null
+++ b/pkg/config/config.go
@@ -0,0 +1,102 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+// This package should, create the default config with the initialised directory
+// Read the config for every other command to work and use the variable vales
+// Add data under the "Links" variable whenever a new config is add via the
+// project.
+// The config file can be either .json .ini .toml .yaml
+// I think yaml is a good file format for this
+
+type Config struct {
+	InitDirectory string     `yaml:"init_directory"`
+	Record        [][]string `yaml:"record"`
+}
+
+var (
+	homeDirectory           string
+	currentWorkingDirectory string
+)
+
+func setupDirectories() error {
+	var err error
+	homeDirectory, err = os.UserHomeDir()
+	if err != nil {
+		return errors.New("Couldn't get the home directory")
+	}
+
+	currentWorkingDirectory, err = os.Getwd()
+	if err != nil {
+		return errors.New("Couldn't get the current working directory")
+	}
+	return nil
+}
+
+// Create a init function, that create the config files, stores the working
+// directory, and other stuff, every other command needs to check if the config
+// file exists, before it works.
+// The config package will be separates, that adds and reads config, the init
+// function should probably call that package
+
+func Initialise() error {
+	err := setupDirectories()
+	if err != nil {
+		return err
+	}
+
+	cfg := Config{
+		InitDirectory: currentWorkingDirectory,
+		Record:        [][]string{},
+	}
+
+	configPath := currentWorkingDirectory + "/.linksym.yaml"
+	data, err := yaml.Marshal(&cfg)
+	if err != nil {
+		return err
+	}
+
+	err = os.WriteFile(configPath, data, 0o644)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func LoadConfig(configPath string) (*Config, error) {
+	// Check if config file exists
+	_, err := os.Stat(configPath)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return nil, errors.New("Config file doesn't exist")
+		} else {
+			return nil, err
+		}
+	}
+
+	file, err := os.Open(configPath)
+	if err != nil {
+		return nil, fmt.Errorf("error opening config file: %s, %w", configPath, err)
+	}
+	defer file.Close()
+
+	data, err := io.ReadAll(file)
+	if err != nil {
+		return nil, err
+	}
+
+	config := Config{}
+
+	err = yaml.Unmarshal(data, &config)
+	if err != nil {
+		return nil, err
+	}
+	return &config, nil
+}