allow using templates to generate messages (#26)

Author: individual-it

teamup-rocketchat-bot/README.md

@@ -48,6 +48,30 @@ LOG_FILE_NAME: teamup-rocket-chat.log
 - `--config Point to the configuration (config) file. It overrides the default configuration file located at app directory`
 - `--logpath Set the custom logpath. It overrides the log path specified in configuration (config.yml) file`
 - `--help Show help and usage screen`
+
+#### templates
+Messages can be customized by calendar, for that Go-templates are used.
+1. get the ID of your calendar:
+   1. go to the settings page of teamup
+   2. go to the calendars list
+   3. click on the calendar you want to create a template for
+   4. copy the number at the end of the URL e.g. `123456` of `https://teamup.com/c/xdfesf/jankaritech/settings/calendars/edit/123456`, this is your calendar id
+2. copy `example.tmpl` to `<calendar-id>.tmpl`
+3. [adjust the template](https://pkg.go.dev/text/template).
+   - **functions** can be used inside the template to perform some operations.  
+    Available functions:
+     - all [sprig](https://masterminds.github.io/sprig/) functions
+     - `NotesInMarkdown` it returns the notes converted from HTML to Markdown
+   - **values** are used to display the actual data in the template. For that all fields of the `TeamupEvent` struct are available. Here are some specially useful ones:
+       1. `.Title`
+       2. `.Who`
+       3. `.Location`
+       4. `.Notes`
+       5. `.StartDt`
+       6. `.EndDt`
+4. repeat for every calendar for which you want to have a custom message for
+5. if there is no template found, a built-in default template will be used.
+
 ### Run locally
 
 *Note*: Make sure that the bot has already been added to channel or room

teamup-rocketchat-bot/config.yml.example

@@ -1,4 +1,4 @@
-# Copy this config.yml.example to config.yml 
+# Copy this config.yml.example to config.yml
 # and edit the following details
 #
 # Donot remove or add fields as the configuration is checked strictly
@@ -40,3 +40,6 @@ LOG_PATH: /var/log
 # name for the log file
 # default log file name is teamup-rocket-chat.log
 LOG_FILE_NAME: teamup-rocket-chat.log
+
+# where are the templates stored
+TEMPLATE_PATH: ./

teamup-rocketchat-bot/configuration.go

@@ -22,6 +22,7 @@ type Configuration struct {
 	RepeatIn     int    `yaml:"REPEAT_IN"`
 	LogPath      string `yaml:"LOG_PATH"`
 	LogFileName  string `yaml:"LOG_FILE_NAME"`
+	TemplatePath string `yaml:"TEMPLATE_PATH"`
 }
 
 // Prints beatiful

teamup-rocketchat-bot/example.tmpl

@@ -0,0 +1,5 @@
+{{ .Who }} **{{ .Title }}** will start soon
+Start-time: **{{ dateInZone "02 Jan 06 15:04" (toDate "2006-01-02T15:04:05Z07:00" (.StartDt)) "Asia/Kathmandu" }}**
+let's meet in {{ .Location }}
+
+{{ (NotesInMarkdown) }}

teamup-rocketchat-bot/go.mod

@@ -1,15 +1,33 @@
 module github.com/jankaritech/hubot/teamup-rocketchat-bot
 
-go 1.19
+go 1.23.0
+
+toolchain go1.24.1
 
 require (
-	github.com/badkaktus/gorocket v0.1.3
-	github.com/go-resty/resty/v2 v2.7.0
+	github.com/JohannesKaufmann/html-to-markdown/v2 v2.3.3
+	github.com/Masterminds/sprig/v3 v3.3.0
+	github.com/badkaktus/gorocket v0.1.4
+	github.com/go-resty/resty/v2 v2.16.5
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
+	dario.cat/mergo v1.0.1 // indirect
+	github.com/JohannesKaufmann/dom v0.2.0 // indirect
+	github.com/Masterminds/goutils v1.1.1 // indirect
+	github.com/Masterminds/semver/v3 v3.3.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
-	golang.org/x/net v0.0.0-20211029224645-99673261e6eb // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/huandu/xstrings v1.5.0 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/shopspring/decimal v1.4.0 // indirect
+	github.com/spf13/cast v1.7.0 // indirect
+	github.com/stretchr/testify v1.10.0 // indirect
+	golang.org/x/crypto v0.39.0 // indirect
+	golang.org/x/net v0.41.0 // indirect
 	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 )

teamup-rocketchat-bot/go.sum

@@ -1,26 +1,76 @@
-github.com/badkaktus/gorocket v0.1.3 h1:ON4YQeuHGYdV6CuD759bGUJ8oxTDdhL9PTVH6QYypFg=
-github.com/badkaktus/gorocket v0.1.3/go.mod h1:tR6QXhjPxNQGDGqmiQo+r5hyvw4lkhqx4C6KXiN8KHw=
-github.com/go-resty/resty/v2 v2.7.0 h1:me+K9p3uhSmXtrBZ4k9jcEAfJmuC8IivWHwaLZwPrFY=
-github.com/go-resty/resty/v2 v2.7.0/go.mod h1:9PWDzw47qPphMRFfhsyk0NnSgvluHcljSMVIq3w7q0I=
-github.com/google/go-cmp v0.5.2 h1:X2ev0eStA3AbceY54o37/0PQ/UWqKEiiO2dKL5OPaFM=
+dario.cat/mergo v1.0.1 h1:Ra4+bf83h2ztPIQYNP99R6m+Y7KfnARDfID+a+vLl4s=
+dario.cat/mergo v1.0.1/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
+github.com/JohannesKaufmann/dom v0.2.0 h1:1bragmEb19K8lHAqgFgqCpiPCFEZMTXzOIEjuxkUfLQ=
+github.com/JohannesKaufmann/dom v0.2.0/go.mod h1:57iSUl5RKric4bUkgos4zu6Xt5LMHUnw3TF1l5CbGZo=
+github.com/JohannesKaufmann/html-to-markdown/v2 v2.3.3 h1:r3fokGFRDk/8pHmwLwJ8zsX4qiqfS1/1TZm2BH8ueY8=
+github.com/JohannesKaufmann/html-to-markdown/v2 v2.3.3/go.mod h1:HtsP+1Fchp4dVvaiIsLHAl/yqL3H1YLwqLC9kNwqQEg=
+github.com/Masterminds/goutils v1.1.1 h1:5nUrii3FMTL5diU80unEVvNevw1nH4+ZV4DSLVJLSYI=
+github.com/Masterminds/goutils v1.1.1/go.mod h1:8cTjp+g8YejhMuvIA5y2vz3BpJxksy863GQaJW2MFNU=
+github.com/Masterminds/semver/v3 v3.3.0 h1:B8LGeaivUe71a5qox1ICM/JLl0NqZSW5CHyL+hmvYS0=
+github.com/Masterminds/semver/v3 v3.3.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
+github.com/Masterminds/sprig/v3 v3.3.0 h1:mQh0Yrg1XPo6vjYXgtf5OtijNAKJRNcTdOOGZe3tPhs=
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+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
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 github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
 github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
-github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/huandu/xstrings v1.5.0 h1:2ag3IFq9ZDANvthTwTiqSSZLjDc+BedvHPAp5tJy2TI=
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+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
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 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-golang.org/x/net v0.0.0-20211029224645-99673261e6eb h1:pirldcYWx7rx7kE5r+9WsOXPXK0+WH5+uZ7uPmJ44uM=
-golang.org/x/net v0.0.0-20211029224645-99673261e6eb/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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teamup-rocketchat-bot/main.go

@@ -1,19 +1,23 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"log"
 	"os"
 	"path"
-	"regexp"
+	"strconv"
 	"strings"
 	"sync"
+	"text/template"
 	"time"
 
 	"flag"
 
+	htmltomarkdown "github.com/JohannesKaufmann/html-to-markdown/v2"
+	"github.com/Masterminds/sprig/v3"
 	"github.com/badkaktus/gorocket"
 	"github.com/go-resty/resty/v2"
 )
@@ -229,7 +233,11 @@ func checkForMeetings(config *Configuration, chatClient *gorocket.Client) {
 			diff := timeDiffWithNow(event.StartDt)
 			if diff > 10 && diff < 21 {
 				toNotifyEventsIds = append(toNotifyEventsIds, EventIDWithStartTime{event.ID, event.StartDt})
-				toSendMsgs = append(toSendMsgs, prepareMeetingMsg(event))
+				message, err := prepareMeetingMsg(event, config)
+				if err != nil {
+					logger.Printf("failed to create message due to following error:\n%s", err.Error())
+				}
+				toSendMsgs = append(toSendMsgs, message)
 			}
 		}
 
@@ -529,50 +537,52 @@ func getFutureEvents(events *TeamupEvents, alreadyNotified []EventIDWithStartTim
 	return futureEvents
 }
 
-// prepareMeetingMsg prepares message to be
-// sent for the upcoming event
-// with following format
-//
-// @mentions *Event title* will start soon
-// Start-time: 10:00
-// let's meet in:
-// Some description
-// of the meeting
-func prepareMeetingMsg(event TeamupEvent) string {
-	title := event.Title
-	who := event.Who
-	locale, _ := time.LoadLocation("Asia/Kathmandu")
-	startTime, _ := time.Parse(time.RFC3339, event.StartDt) // Parse the time in locale time
-	location := event.Location
-	notes := event.Notes
-	description := strings.Split(notes, "\n")
-	descSlice := make([]string, 0)
-
-	// Catches the html tags present
-	removeTag := regexp.MustCompile(`<\/?[^>]+(>|$)`) // Create a global func for this
-	// Catches the whole line containing Who: @mention1 @mention2
-	removeMention := regexp.MustCompile(`^(Who|who):\s*@.*$`) // Create a global func for this
-
-	// Trim the white space, remove html tags, remove "Who: @"
-	for i := 0; i < len(description); i++ {
-		str := strings.TrimSpace(description[i])
-		str = removeTag.ReplaceAllString(str, "")
-		str = removeMention.ReplaceAllString(str, "")
-		// Only add the non-empty lines
-		if len(str) > 0 {
-			descSlice = append(descSlice, str)
+// prepareMeetingMsg reads a template with the name subcalendarID + .tmpl
+// renders it and returns a string of the message
+func prepareMeetingMsg(event TeamupEvent, config *Configuration) (string, error) {
+	templateFile := strconv.Itoa(event.SubcalendarID) + ".tmpl"
+	templateFullPath := path.Join(config.TemplatePath, templateFile)
+	funcMap := template.FuncMap{
+		"NotesInMarkdown": func() string {
+			markdown, _ := htmltomarkdown.ConvertString(event.Notes)
+			return markdown
+		},
+	}
+	// add all the functions from sprig
+	for i, f := range sprig.FuncMap() {
+		funcMap[i] = f
+	}
+
+	var tmpl *template.Template
+	// Check if the template file exists and is readable
+	if _, err := os.Stat(templateFullPath); err != nil {
+		logger.Printf("No template with filename '%s' not found, using default template\n", templateFullPath)
+		defaultTemplate := "**REMINDER**\n" +
+			"_{{ .Title }}_\n" +
+			"Who: {{ .Who }}\n" +
+			"Start-time: **{{ toDate \"2006-01-02T15:04:05Z07:00\" (.StartDt) | date \"02 Jan 06 15:04\"}}**\n" +
+			"End-time: **{{ toDate \"2006-01-02T15:04:05Z07:00\" (.EndDt) | date \"02 Jan 06 15:04\"}}**\n" +
+			"Location: {{ .Location }}\n" +
+			"Notes: {{ (NotesInMarkdown) }}"
+		tmpl, err = template.New("default").Funcs(funcMap).Parse(defaultTemplate)
+		if err != nil {
+			return "", err
 		}
+	} else {
+		tmpl, err = template.New(templateFile).Funcs(funcMap).ParseFiles(templateFullPath)
+		if err != nil {
+			return "", err
+		}
+
+	}
+	var buff bytes.Buffer
+
+	err := tmpl.Execute(&buff, event)
+	if err != nil {
+		return "", err
 	}
-	finalDesc := strings.Join(descSlice, "\n")
 
-	msg := fmt.Sprintf("%s *%s* will start soon\nStart-time: *%s*\nlet's meet in: %s\n%s",
-		who,
-		title,
-		strings.Split(startTime.In(locale).String(), "+")[0],
-		location,
-		finalDesc,
-	)
-	return msg
+	return buff.String(), nil
 }
 
 // Some struct definitions