Improve config file structure by combining multiple recipients into lists (breaking)

README.md

@@ -34,27 +34,28 @@ Example:
 ```json
 {
   "api_fetch_interval": 600,
-  "datafile": "data.json",
   "enabled_api_endpoints": [
     "bay",
     "bund"
   ],
+  "datafile": "data.json",
   "loglevel": 2,
-  "recipients": [
+  "lists": [
     {
-      "address": "guenther@example.org",
-      "include": [
-        {"classification": "kritisch"},
-        {"title_contains": "jQuery"}
+      "name": "Example List",
+      "recipients": ["someone@example.org"],
+      "filter": [
+        {"classification": "hoch", "title_contains": "Microsoft"},
+        {"classification": "kritisch"}
       ]
     }
   ],
   "smtp": {
-    "from": "from@example.org",
-    "host": "example.org",
+    "from": "user@localhost",
+    "host": "127.0.0.1",
     "port": 587,
-    "user": "from@example.org",
-    "password": "SiEhAbEnMiChInSgEsIcHtGeFiLmTdAsDüRfEnSiEnIcHt"
+    "user": "user@localhost",
+    "password": "change me :)"
   },
   "template": {
     "subject": "",

config.go

@@ -11,7 +11,7 @@ type Config struct {
 	EnabledApiEndpoints []string `json:"enabled_api_endpoints"`
 	PersistentDataFilePath string `json:"datafile"`
 	LogLevel int `json:"loglevel"`
-	Recipients []Recipient `json:"recipients"`
+	Lists *[]NotifyList `json:"lists"`
 	SmtpConfiguration SmtpSettings `json:"smtp"`
 	Template MailTemplateConfig `json:"template"`
 }
@@ -23,12 +23,16 @@ func NewConfig() Config {
 		EnabledApiEndpoints: []string{"bay", "bund"},
 		PersistentDataFilePath: "data.json",
 		LogLevel: 2,
-		Recipients: []Recipient{},
+		Lists: &[]NotifyList{
+			{ Name: "Example List",
+			  Recipients: []string{},
+			  Filter: []Filter{},},
+		},
 		SmtpConfiguration: SmtpSettings{
-			From: "from@example.org",
-			User: "from@example.org",
-			Password: "SiEhAbEnMiChInSgEsIcHtGeFiLmTdAsDüRfEnSiEnIcHt",
-			ServerHost: "example.org",
+			From: "user@localhost",
+			User: "user@localhost",
+			Password: "change me :)",
+			ServerHost: "127.0.0.1",
 			ServerPort: 587},
 		Template: MailTemplateConfig{
 			SubjectTemplate: "",
@@ -39,18 +43,20 @@ func NewConfig() Config {
 }
 
 func checkConfig(config Config) {
-	if len(config.Recipients) < 1 {
+	if len(*config.Lists) < 1 {
 		logger.error("Configuration is incomplete")
-		panic(errors.New("no recipients are configured"))
+		panic(errors.New("no lists are configured"))
 	}
-	for _, r := range config.Recipients {
-		if !mailAddressIsValid(r.Address) {
+	for _, l := range *config.Lists {
+		if len(l.Filter) < 1 {
+			logger.error("Configuration is incomplete")
+			panic(errors.New("list " + l.Name + " has no filter defined - at least [{'any': true/false}] should be configured"))
+		}
+		for _, r := range l.Recipients {
+			if !mailAddressIsValid(r) {
 				logger.error("Configuration includes invalid data")
-			panic(errors.New("'" + r.Address + "' is not a valid e-mail address"))
+				panic(errors.New("'" + r + "' is not a valid e-mail address"))
 			}
-		if len(r.Filters) < 1 {
-			logger.error("Configuration is incomplete")
-			panic(errors.New("recipient " + r.Address + " has no filter defined - at least {'any': true/false} should be configured"))
 		}
 	}
 	if !mailAddressIsValid(config.SmtpConfiguration.From) {

mail.go

@@ -23,21 +23,22 @@ func (c MailContent) serializeValidMail(from string, to string) []byte {
 	// and I'm too lazy to encode ä into =E4 and so on
 	subjectEncoded := base64.StdEncoding.EncodeToString([]byte(c.Subject))
 	bodyEncoded := base64.StdEncoding.EncodeToString([]byte(c.Body))
-	data := []byte(fmt.Sprintf(
+	data := fmt.Appendf(nil, 
 		"Content-Type: text/plain; charset=\"utf-8\"\r\nContent-Transfer-Encoding: base64\r\nFrom: %v%vTo: %v%vSubject: =?utf-8?b?%v?=%v%v%v",
 		from, MAIL_LINE_SEP,
 		to, MAIL_LINE_SEP,
 		subjectEncoded, MAIL_LINE_SEP,
 		MAIL_LINE_SEP,
-		bodyEncoded))
+		bodyEncoded)
 	// done, I guess
 	return data
 }
 
-type Recipient struct {
-	Address string `json:"address"`
+type NotifyList struct {
+	Name string `json:"name"`
+	Recipients []string `json:"recipients"`
 	// Must be a configured filter id
-	Filters []Filter `json:"include"`
+	Filter []Filter `json:"filter"`
 }
 
 type SmtpSettings struct {
@@ -48,8 +49,8 @@ type SmtpSettings struct {
 	Password string `json:"password"`
 }
 
-func (r Recipient) sendNotices(notices []WidNotice, template MailTemplate, auth smtp.Auth, smtpConfig SmtpSettings, cache *map[string][]byte) error {
-	logger.debug("Generating and sending mails to " + r.Address + " ...")
+func sendNotices(recipient string, notices []WidNotice, template MailTemplate, auth smtp.Auth, smtpConfig SmtpSettings, cache *map[string][]byte) error {
+	logger.debug("Generating and sending mails for recipient " + recipient + " ...")
 	cacheHits := 0
 	cacheMisses := 0
 	mails := [][]byte{}
@@ -67,7 +68,7 @@ func (r Recipient) sendNotices(notices []WidNotice, template MailTemplate, auth
 				logger.error(err)
 			}
 			// serialize mail
-			data = mailContent.serializeValidMail(smtpConfig.From, r.Address)
+			data = mailContent.serializeValidMail(smtpConfig.From, recipient)
 			// add to cache
 			(*cache)[n.Uuid] = data
 		}
@@ -77,11 +78,11 @@ func (r Recipient) sendNotices(notices []WidNotice, template MailTemplate, auth
 	err := sendMails(
 		smtpConfig,
 		auth,
-		r.Address,
+		recipient,
 		mails,
 	)
 	if err != nil { return err }
-	logger.debug("Successfully sent all mails to " + r.Address)
+	logger.debug("Successfully sent all mails to " + recipient)
 	return nil
 }
 

main.go

@@ -120,22 +120,35 @@ func main() {
 		logger.debug(fmt.Sprintf("Got %v new notices", len(newNotices)))
 		if len(newNotices) > 0 {
 			logger.info("Sending email notifications ...")
+			// mail recipient : pointer to slice of wid notices to be sent
+			noticesToBeSent := map[string][]WidNotice{}
 			recipientsNotified := 0
 			var err error
-			for _, r := range config.Recipients {
-				// Filter notices for this recipient
-				filteredNotices := []WidNotice{}
-				for _, f := range r.Filters {
+			for _, l := range *config.Lists {
+				// Filter notices for this list
+				for _, f := range l.Filter {
 					for _, n := range f.filter(newNotices) {
-						if !noticeSliceContains(filteredNotices, n) {
-							filteredNotices = append(filteredNotices, n)
+						for _, r := range l.Recipients {
+							if !noticeSliceContains(noticesToBeSent[r], n) {
+								noticesToBeSent[r] = append(noticesToBeSent[r], n)
 							}
 						}
 					}
-				slices.Reverse(filteredNotices)
-				logger.debug(fmt.Sprintf("Including %v of %v notices for recipient %v", len(filteredNotices), len(newNotices), r.Address))
-				// Send notices
-				err = r.sendNotices(filteredNotices, mailTemplate, mailAuth, config.SmtpConfiguration, &cache)
+				}
+			}
+			for r, notices := range noticesToBeSent {
+				// sort by publish date
+				slices.SortFunc(notices, func(a WidNotice, b WidNotice) int {
+					if a.Published == b.Published {
+						return 0
+					} else if a.Published.After(b.Published) {
+						return 1
+					} else {
+						return -1
+					}
+				})
+				// send
+				err = sendNotices(r, notices, mailTemplate, mailAuth, config.SmtpConfiguration, &cache)
 				if err != nil {
 					logger.error(err)
 				} else {
@@ -149,7 +162,7 @@ func main() {
 					persistent.data.(PersistentData).LastPublished[id] = t
 					persistent.save()
 				}
-				logger.info(fmt.Sprintf("Email notifications sent to %v of %v recipients", recipientsNotified, len(config.Recipients)))
+				logger.info(fmt.Sprintf("Email notifications sent to %v of %v recipients", recipientsNotified, len(noticesToBeSent)))
 			}
 		}
 		dt := int(time.Now().UnixMilli() - t1)