add cli tool to check for earlier available slots

.gitignore

@@ -1,3 +1,8 @@
+
+# Created by https://www.toptal.com/developers/gitignore/api/windows,linux,macos,go,jetbrains+iml
+# Edit at https://www.toptal.com/developers/gitignore?templates=windows,linux,macos,go,jetbrains+iml
+
+### Go ###
 # Binaries for programs and plugins
 *.exe
 *.exe~
@@ -13,3 +18,160 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
+
+### Go Patch ###
+/vendor/
+/Godeps/
+
+### JetBrains+iml ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### JetBrains+iml Patch ###
+# Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-249601023
+
+*.iml
+modules.xml
+.idea/misc.xml
+*.ipr
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.toptal.com/developers/gitignore/api/windows,linux,macos,go,jetbrains+iml

api.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+type slot struct {
+	StartDate time.Time
+}
+
+func getCovidVaccinationSlots(authority int) ([]slot, error) {
+	url := fmt.Sprintf("https://e-gov.ooe.gv.at/at.gv.ooe.cip/services/api/covid/slots?page=1&size=1000&orgUnitId=%d&birthdate=1990-01-01", authority)
+	response, err := http.Get(url)
+	if err != nil {
+		return nil, fmt.Errorf("http get slots failed: %w", err)
+	}
+	defer response.Body.Close()
+
+	var jsonSlots []map[string]interface{}
+	err = json.NewDecoder(response.Body).Decode(&jsonSlots)
+
+	slots, err := parseSlots(jsonSlots)
+	if err != nil {
+		return nil, err
+	}
+
+	return slots, err
+}
+
+// startDate of slots doesn't follow the ISO 8601 definition so we need to parse the dates by ourselves.
+func parseSlots(jsonSlots []map[string]interface{}) ([]slot, error) {
+	slots := make([]slot, len(jsonSlots))
+	for _, jsonSlot := range jsonSlots {
+		startDate, err := time.ParseInLocation("2006-01-02T15:04:05", jsonSlot["startDate"].(string), time.Local)
+		if err != nil {
+			return nil, fmt.Errorf("parse time failed: %w", err)
+		}
+		slots = append(slots, slot{startDate})
+	}
+	return slots, nil
+}

flags.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"golang.org/x/term"
+	"strconv"
+	"strings"
+	"syscall"
+	"time"
+)
+
+var (
+	authorities    []int
+	date           time.Time
+	iftttEventName string
+	iftttKey       string
+)
+
+func parseFlags() error {
+	authoritiesFlag := flag.String("authorities", "", "comma-separated list of authorities")
+	dateFlag := flag.String("date", "", "date in ISO format, e.g. 2021-06-30")
+	iftttEventNameFlag := flag.String("ifttt-event-name", "", "IFTTT event name of webhook")
+	flag.Parse()
+
+	if *authoritiesFlag == "" {
+		return errors.New("authorities flag missing")
+	}
+
+	if *dateFlag == "" {
+		return errors.New("date flag missing")
+	}
+
+	if *iftttEventNameFlag == "" {
+		return errors.New("ifttt-event-name flag missing")
+	}
+
+	err := parseAuthoritiesFlag(authoritiesFlag)
+	if err != nil {
+		return fmt.Errorf("parse authorities failed: %w", err)
+	}
+
+	err = parseDateFlag(dateFlag)
+	if err != nil {
+		return fmt.Errorf("parse date failed: %w", err)
+	}
+
+	parseIFTTTEventName(iftttEventNameFlag)
+
+	err = promptIFTTTKey()
+	if err != nil {
+		return fmt.Errorf("prompt for ifttt key failed: %w", err)
+	}
+
+	return nil
+}
+
+func parseAuthoritiesFlag(authoritiesFlag *string) error {
+	for _, authority := range strings.Split(*authoritiesFlag, ",") {
+		atoi, err := strconv.Atoi(authority)
+		if err != nil {
+			return fmt.Errorf("convert authority string to int failed: %w", err)
+		}
+		authorities = append(authorities, atoi)
+	}
+
+	return nil
+}
+
+func parseDateFlag(dateFlag *string) error {
+	var err error
+	date, err = time.Parse("2006-01-02", strings.TrimSpace(*dateFlag))
+	if err != nil {
+		return fmt.Errorf("parse date failed: %w", err)
+	}
+
+	return nil
+}
+
+func parseIFTTTEventName(iftttEventNameFlag *string) {
+	iftttEventName = strings.TrimSpace(*iftttEventNameFlag)
+}
+
+func promptIFTTTKey() error {
+	fmt.Println("Enter IFTTT Key: ")
+	iftttKeyBytes, err := term.ReadPassword(int(syscall.Stdin))
+	if err != nil {
+		return fmt.Errorf("read password prompt failed: %w", err)
+	}
+
+	iftttKey = string(iftttKeyBytes)
+	return nil
+}

go.mod

@@ -0,0 +1,5 @@
+module ooe-impf-alert
+
+go 1.16
+
+require golang.org/x/term v0.0.0-20210503060354-a79de5458b56

go.sum

@@ -0,0 +1,4 @@
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20210503060354-a79de5458b56 h1:b8jxX3zqjpqb2LklXPzKSGJhzyxCOZSz8ncv8Nv+y7w=
+golang.org/x/term v0.0.0-20210503060354-a79de5458b56/go.mod h1:tfny5GFUkzUvx4ps4ajbZsCe5lw1metzhBm9T3x7oIY=