~gjabell/mfn

ref: 2e65bde5555018cd5cdfc4a704c9da335fe38668 mfn/config.go -rw-r--r-- 2.8 KiB View raw
2e65bde5Galen Abell Add email notifier 2 months ago
                                                                                
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package main

import (
	"fmt"
	"html/template"

	"github.com/BurntSushi/toml"
)

type EmailConfig struct {
	SubjectTemplate    *template.Template `toml:"-"`
	SubjectTemplateStr string             `toml:"subject_template"`
	BodyTemplate       *template.Template `toml:"-"`
	BodyTemplateStr    string             `toml:"body_template"`
	EmailTo            string             `toml:"to"`
	EmailFrom          string             `toml:"from"`
	Username           string             `toml:"username"`
	Password           string             `toml:"password"`
	Server             string             `toml:"server"`
}

func (c *EmailConfig) validate() error {
	for k, v := range map[string]string{
		"subject template": c.SubjectTemplateStr,
		"body template":    c.BodyTemplateStr,
		"\"to\" email":     c.EmailTo,
		"\"from\" email":   c.EmailFrom,
		"username":         c.Username,
		"password":         c.Password,
		"server":           c.Server,
	} {
		if v == "" {
			return fmt.Errorf("you must provide a valid %s", k)
		}
	}

	// parse the templates
	subjTmpl, err := template.New("subject_template").Parse(c.SubjectTemplateStr)
	if err != nil {
		return err
	}
	c.SubjectTemplate = subjTmpl

	bodyTmpl, err := template.New("body_template").Parse(c.BodyTemplateStr)
	if err != nil {
		return err
	}
	c.BodyTemplate = bodyTmpl

	return nil
}

type WebhookConfig struct {
	Template    *template.Template `toml:"-"`
	TemplateStr string             `toml:"template"`
	Endpoint    string             `toml:"endpoint"`
}

func (c *WebhookConfig) validate() error {
	for k, v := range map[string]string{
		"template": c.TemplateStr,
		"endpoint": c.Endpoint,
	} {
		if v == "" {
			return fmt.Errorf("you must provide a valid %s", k)
		}
	}

	// parse the template
	tmpl, err := template.New("webhook").Parse(c.TemplateStr)
	if err != nil {
		return err
	}
	c.Template = tmpl

	return nil
}

type Config struct {
	Server   string `toml:"server"`
	Username string `toml:"username"`
	Password string `toml:"password"`
	DbPath   string `toml:"db_path"`

	EmailConfig   EmailConfig   `toml:"email"`
	WebHookConfig WebhookConfig `toml:"webhook"`
}

func LoadConfig(configPath string) (*Config, error) {
	var c Config

	if _, err := toml.DecodeFile(configPath, &c); err != nil {
		return nil, err
	}

	if err := c.validate(); err != nil {
		return nil, err
	}

	return &c, nil
}

func (c *Config) validate() error {
	for k, v := range map[string]string{
		"server url":    c.Server,
		"username":      c.Username,
		"password":      c.Password,
		"database path": c.DbPath,
	} {
		if v == "" {
			return fmt.Errorf("you must provide a valid %s", k)
		}
	}

	if err := c.EmailConfig.validate(); err != nil {
		return fmt.Errorf("invalid email config: %s", err)
	}

	if err := c.WebHookConfig.validate(); err != nil {
		return fmt.Errorf("invalid webhook config: %s", err)
	}

	return nil
}