Release 0.2.0

- new language: go
- new shops: cybertek.fr, mediamarkt.ch
- deprecated shops: alternate.be, minershop.eu
- improved database transaction management
- better web parsing library (ferret, requires headless chrome browser)
- include or exclude products by applying regex on their names
- check for PID file to avoid running the bot twice
- hastags are now configurable

Signed-off-by: Julien Riou <julien@riou.xyz>

config.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"path/filepath"
+)
+
+// Config to store JSON configuration
+type Config struct {
+	TwitterConfig `json:"twitter"`
+	URLs          []string `json:"urls"`
+	IncludeRegex  string   `json:"include_regex"`
+	ExcludeRegex  string   `json:"exclude_regex"`
+}
+
+// TwitterConfig to store Twitter API secrets
+type TwitterConfig struct {
+	ConsumerKey       string            `json:"consumer_key"`
+	ConsumerSecret    string            `json:"consumer_secret"`
+	AccessToken       string            `json:"access_token"`
+	AccessTokenSecret string            `json:"access_token_secret"`
+	Hashtags          map[string]string `json:"hashtags"`
+}
+
+// NewConfig creates a Config struct
+func NewConfig() *Config {
+	return &Config{}
+}
+
+// Read Config from configuration file
+func (c *Config) Read(file string) error {
+	file, err := filepath.Abs(file)
+	if err != nil {
+		return err
+	}
+
+	jsonFile, err := ioutil.ReadFile(file)
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(jsonFile, &c)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// HasTwitter returns true when Twitter has been configured
+func (c *Config) HasTwitter() bool {
+	return (c.TwitterConfig.AccessToken != "" && c.TwitterConfig.AccessTokenSecret != "" && c.TwitterConfig.ConsumerKey != "" && c.TwitterConfig.ConsumerSecret != "")
+}