First Commit

2023-11-23 14:04:44 +01:00 · 2023-11-23 14:04:44 +01:00 · a76f6bfb0c
commit a76f6bfb0c
13 changed files with 452 additions and 0 deletions
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
--- a/.idea/mail-reminder.iml
+++ b/.idea/mail-reminder.iml
@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/mail-reminder.iml" filepath="$PROJECT_DIR$/.idea/mail-reminder.iml" />
+    </modules>
+  </component>
+</project>
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
--- a/30
+++ b/30
@ -0,0 +1,30 @@
+# syntax=docker/dockerfile:1
+
+# Build the application from source
+FROM golang:1.21.4 AS build-stage
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY *.go ./
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o /docker-mail-reminder
+
+# Run the tests in the container
+FROM build-stage AS run-test-stage
+RUN go test -v ./...
+
+# Deploy the application binary into a lean image
+FROM gcr.io/distroless/base-debian11 AS build-release-stage
+
+WORKDIR /
+
+COPY --from=build-stage /docker-mail-reminder /docker-mail-reminder
+
+#EXPOSE 8080
+
+USER nonroot:nonroot
+
+ENTRYPOINT ["/docker-mail-reminder"]
--- a/README.md
+++ b/README.md
@ -0,0 +1,58 @@
+# Your Go Application
+
+This is a simple Go application that does iCalendar files (.ics) analyzes and sends notifications by email based on the events in these iCalendar files.
+
+## Prerequisites
+
+Before you begin, ensure you have the following installed:
+
+- [Docker](https://docs.docker.com/get-docker/)
+- [Docker Compose](https://docs.docker.com/compose/install/)
+
+## Getting Started
+
+1. **Clone the repository:**
+
+    ```bash
+    git clone <repository-url>
+    ```
+
+2. **Create an environment variables file:**
+
+   Create a file named `.env` in your project directory. Fill this file with the required environment variables:
+
+    ```env
+    FROM_EMAIL=user@example.com
+    TO_EMAIL=recipient@example.com
+    EMAIL_PASSWORD=your_password
+    SMTP_HOST=smtp.example.com
+    SMTP_PORT=587
+    ICS_DIR=/path/to/ics/files
+    ```
+
+   Customize the values according to your application.
+
+3. **Build and run the Docker container:**
+
+    ```bash
+    docker-compose up --build
+    ```
+
+   This command uses Docker Compose to build and run the container, loading environment variables from the `.env` file.
+
+4. **Access your application:**
+
+   Open your web browser and go to [http://localhost:8080](http://localhost:8080).
+
+## Customizing the Docker Image
+
+- If your application uses additional environment variables, add them to the `.env` file.
+- Customize the Dockerfile or docker-compose.yml if needed.
+
+## Contributing
+
+If you'd like to contribute, please fork the repository and create a pull request. Feel free to open an issue if you encounter any problems or have suggestions.
+
+## License
+
+This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
--- a/cron-job.sh
+++ b/cron-job.sh
@ -0,0 +1,3 @@
+#!/bin/sh
+echo "0 6 * * * /usr/local/bin/docker-compose -f /opt/containers/mail-reminder/docker-compose.yml up --build --exit-code-from go-app" > /etc/crontabs/root
+crond -f -l 8
--- a/docker-compose.yml
+++ b/docker-compose.yml
@ -0,0 +1,15 @@
+version: '3'
+
+services:
+  go-app:
+    build:
+      context: .
+    env_file: .env
+    volumes:
+      - /opt/containers/mailu/dav/collection-root:/dav:ro
+
+  cron:
+    image: alpine:latest
+    volumes:
+      - ./cron-job.sh:/etc/periodic/daily/cron-job
+    command: ["crond", "-f", "-d", "8"]
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,16 @@
+module mail-reminder
+
+go 1.21
+
+require (
+	github.com/apognu/gocal v0.9.0
+	github.com/sirupsen/logrus v1.9.3
+	gopkg.in/mail.v2 v2.3.1
+)
+
+require (
+	github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 // indirect
+	golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect
+	gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc // indirect
+	gopkg.in/yaml.v3 v3.0.0 // indirect
+)
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,27 @@
+github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 h1:N5Vqww5QISEHsWHOWDEx4PzdIay3Cg0Jp7zItq2ZAro=
+github.com/ChannelMeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61/go.mod h1:GnKXcK+7DYNy/8w2Ex//Uql4IgfaU82Cd5rWKb7ah00=
+github.com/apognu/gocal v0.9.0 h1:2lGdZprjYs9A6l1RTEmapmpE1PiDbXNX8bUVqZt3vm4=
+github.com/apognu/gocal v0.9.0/go.mod h1:ZOJfNOqpz8aasi3uqzDu+eWTT6VuEa/TvQWiYYWlb80=
+github.com/channelmeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61 h1:o64h9XF42kVEUuhuer2ehqrlX8rZmvQSU0+Vpj1rF6Q=
+github.com/channelmeter/iso8601duration v0.0.0-20150204201828-8da3af7a2a61/go.mod h1:Rp8e0DCtEKwXFOC6JPJQVTz8tuGoGvw6Xfexggh/ed0=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.0/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 h1:0A+M6Uqn+Eje4kHMK80dtF3JCXC4ykBgQG4Fe06QRhQ=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc h1:2gGKlE2+asNV9m7xrywl36YYNnBG5ZQ0r/BOOxqPpmk=
+gopkg.in/alexcesaro/quotedprintable.v3 v3.0.0-20150716171945-2caba252f4dc/go.mod h1:m7x9LTH6d71AHyAX77c9yqWCCa3UKHcVEj9y7hAtKDk=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/mail.v2 v2.3.1 h1:WYFn/oANrAGP2C0dcV6/pbkPzv8yGzqTjPmTeO7qoXk=
+gopkg.in/mail.v2 v2.3.1/go.mod h1:htwXN1Qh09vZJ1NVKxQqHPBaCBbzKhp5GzuJEA4VJWw=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0 h1:hjy8E9ON/egN1tAYqKb61G10WtihqetD4sz2H+8nIeA=
+gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/ics/subdir/test.ics
+++ b/ics/subdir/test.ics
@ -0,0 +1,49 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//ical.marudot.com//iCal Event Maker
+CALSCALE:GREGORIAN
+BEGIN:VTIMEZONE
+TZID:Europe/Berlin
+LAST-MODIFIED:20230407T050750Z
+TZURL:https://www.tzurl.org/zoneinfo-outlook/Europe/Berlin
+X-LIC-LOCATION:Europe/Berlin
+BEGIN:DAYLIGHT
+TZNAME:CEST
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+DTSTART:19700329T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CET
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+DTSTART:19701025T030000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+DTSTAMP:20231123T113949Z
+UID:1700739536627-74911@ical.marudot.com
+DTSTART;TZID=Europe/Berlin:20231123T120000
+DTEND;TZID=Europe/Berlin:20231123T120000
+SUMMARY:test1
+DESCRIPTION:test1
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20231123T113949Z
+UID:1700739551336-72964@ical.marudot.com
+DTSTART;TZID=Europe/Berlin:20231123T120000
+DTEND;TZID=Europe/Berlin:20231124T120000
+SUMMARY:test2
+DESCRIPTION:test2
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20231123T113949Z
+UID:1700739565150-71554@ical.marudot.com
+DTSTART;TZID=Europe/Berlin:20231124T120000
+DTEND;TZID=Europe/Berlin:20231125T120000
+SUMMARY:test3
+DESCRIPTION:test3
+END:VEVENT
+END:VCALENDAR
--- a/ics/test.ics
+++ b/ics/test.ics
@ -0,0 +1,49 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//ical.marudot.com//iCal Event Maker
+CALSCALE:GREGORIAN
+BEGIN:VTIMEZONE
+TZID:Europe/Berlin
+LAST-MODIFIED:20230407T050750Z
+TZURL:https://www.tzurl.org/zoneinfo-outlook/Europe/Berlin
+X-LIC-LOCATION:Europe/Berlin
+BEGIN:DAYLIGHT
+TZNAME:CEST
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+DTSTART:19700329T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CET
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+DTSTART:19701025T030000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+DTSTAMP:20231123T113949Z
+UID:1700739536627-74911@ical.marudot.com
+DTSTART;TZID=Europe/Berlin:20231123T120000
+DTEND;TZID=Europe/Berlin:20231123T120000
+SUMMARY:test1
+DESCRIPTION:test1
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20231123T113949Z
+UID:1700739551336-72964@ical.marudot.com
+DTSTART;TZID=Europe/Berlin:20231123T120000
+DTEND;TZID=Europe/Berlin:20231124T120000
+SUMMARY:test2
+DESCRIPTION:test2
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20231123T113949Z
+UID:1700739565150-71554@ical.marudot.com
+DTSTART;TZID=Europe/Berlin:20231124T120000
+DTEND;TZID=Europe/Berlin:20231125T120000
+SUMMARY:test3
+DESCRIPTION:test3
+END:VEVENT
+END:VCALENDAR
--- a/main.go
+++ b/main.go
@ -0,0 +1,174 @@
+package main
+
+import (
+	"crypto/tls"
+	"fmt"
+	"github.com/apognu/gocal"
+	log "github.com/sirupsen/logrus"
+	gomail "gopkg.in/mail.v2"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	fromString     string
+	toAddresses    []string
+	passwordString string
+	hostString     string
+	hostPortString int
+)
+
+func main() {
+	// Configure logrus
+	log.SetFormatter(&log.TextFormatter{})
+	log.SetOutput(os.Stdout)
+	log.SetLevel(log.InfoLevel)
+
+	log.Info("Hello World!")
+
+	// Initialisiere err mit einem Fehlerwert
+	var err error
+
+	// Read environment variables
+	fromString = os.Getenv("FROM_EMAIL")
+	toAddresses = strings.Split(os.Getenv("TO_EMAIL"), ",")
+	passwordString = os.Getenv("EMAIL_PASSWORD")
+	hostString = os.Getenv("SMTP_HOST")
+	hostPortString, err = strconv.Atoi(os.Getenv("SMTP_PORT"))
+
+	// Überprüfung auf Fehler
+	if err != nil {
+		fmt.Println("Fehler bei der Umwandlung. Verwende Standardwert 587.")
+		// Setze einen Standardwert, zum Beispiel 0
+		hostPortString = 587
+	}
+
+	// Get the current working directory
+	dir, err := os.Getwd()
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Infof("Current Working Directory is = %s", dir)
+
+	// Read and split multiple folders
+	folderList := os.Getenv("ICS_DIR")
+	if folderList == "" || fromString == "" || len(toAddresses) == 0 || passwordString == "" || hostString == "" {
+		log.Fatal("Es fehlen noch einige Parameter!!!\nICS_DIR, FROM_EMAIL, TO_EMAIL, EMAIL_PASSWORD, SMTP_HOST")
+	}
+
+	folders := strings.Split(folderList, ",")
+	for _, folder := range folders {
+		log.Infof("folder: %s from: %s to: %s password: %s host: %s", folder, fromString, toAddresses, passwordString, hostString)
+		listFilesForFolder(folder)
+	}
+}
+
+func listFilesForFolder(folder string) {
+	// Öffne das Verzeichnis
+	dir, err := os.Open(folder)
+	if err != nil {
+		log.Fatal("Fehler beim Öffnen des Ordners:", err)
+		return
+	}
+	defer dir.Close()
+
+	// Lies alle Dateien im Verzeichnis
+	dateien, err := dir.Readdir(0)
+	if err != nil {
+		log.Fatal("Fehler beim Lesen des Verzeichnisses:", err)
+		return
+	}
+
+	// Durchlaufe die Liste der Dateien und gebe ihre Namen aus
+	for _, datei := range dateien {
+		// Überprüfe, ob es sich um ein Verzeichnis handelt. Wenn ja, ignoriere es.
+		if datei.IsDir() {
+			continue
+		}
+
+		// Hier kannst du die Dateinamen ausgeben oder damit arbeiten.
+		log.Println(datei.Name())
+
+		getNotifications(folder + "/" + datei.Name())
+	}
+}
+
+func getNotifications(file string) {
+	f, err := os.Open(file)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+
+	var tzMapping = map[string]string{
+		"My Super Zone": "Europe/Berlin",
+	}
+
+	gocal.SetTZMapper(func(s string) (*time.Location, error) {
+		if tzid, ok := tzMapping[s]; ok {
+			return time.LoadLocation(tzid)
+		}
+		return nil, fmt.Errorf("")
+	})
+
+	start, end := truncateToDay(time.Now()), truncateToDay(time.Now()).Add(24*60*time.Minute)
+
+	c := gocal.NewParser(f)
+	c.Start, c.End = &start, &end
+	c.Parse()
+
+	for _, e := range c.Events {
+		log.Infof("%s on %s", e.Summary, e.Start)
+
+		messageSubject := fmt.Sprintf("Es existiert für heute ein neuer Kalendereintrag Namens: %s", e.Summary)
+		log.Println(messageSubject)
+		messageText := fmt.Sprintf("Der Termin beginnt heute um: %s und endet um: %s.", e.Start, e.End)
+		if len(e.Location) != 0 {
+			messageText += fmt.Sprintf("\n\nEr findet in %s statt.", e.Location)
+		}
+		if len(e.Description) != 0 {
+			messageText += fmt.Sprintf("\n\nFolgende Notiz existiert in diesen Eintrag: \n%s", e.Description)
+		}
+		messageText += "\n\n This email is a service from mail-reminder Version 1.0 written in Golang. \n Delivered by Simon Rieger"
+
+		for _, toAddress := range toAddresses {
+			sendMail(messageSubject, messageText, toAddress)
+		}
+	}
+}
+
+func truncateToDay(t time.Time) time.Time {
+	return time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, t.Location())
+}
+
+func sendMail(messageSubject string, messageText string, toAddress string) {
+	m := gomail.NewMessage()
+
+	// Set E-Mail sender
+	m.SetHeader("From", fromString)
+
+	// Set E-Mail receivers
+	m.SetHeader("To", toAddress)
+
+	// Set E-Mail subject
+	m.SetHeader("Subject", messageSubject)
+
+	// Set E-Mail body. You can set plain text or html with text/html
+	m.SetBody("text/plain", messageText)
+
+	// Settings for SMTP server
+	d := gomail.NewDialer(hostString, hostPortString, fromString, passwordString)
+
+	// This is only needed when SSL/TLS certificate is not valid on server.
+	// In production this should be set to false.
+	d.TLSConfig = &tls.Config{InsecureSkipVerify: true}
+
+	// Now send E-Mail
+	if err := d.DialAndSend(m); err != nil {
+		log.Fatal(err)
+		panic(err)
+	}
+	log.Infof("Email Message Sent Successfully")
+}