Initial implementation

.gitignore

@@ -1,3 +1,3 @@
 .idea/**
-template
+holiday-api
 .env

README.md

@@ -1,22 +1,96 @@
-# go-web-app-template
+# Holiday api
 
-Basic template for creating go applications
+Simple api used for tracking holidays
 
-Includes:
+## Endpoints
- * dotenv
- * pq
- * sqlx
- * chi
- * google.uuid
 
-To start using make sure to setup either environment variables listed
+Fetching is done via `GET /api/v1/holidays` endpoint
-below, or create .env file and copy variables below
+
+That endpoint accepts a list of required and optional parameters
+
+### Required parameters
+`country`
+  - determines for which country holidays are fetched, uses ISO 3166-1 Alpha-2 codes [more info here](https://en.wikipedia.org/wiki/ISO_3166-1)
+  - eg. `country=US`
+
+### Optional parameters
+`year`
+  - returns only holidays for given year
+  - eg. `year=2023`
+  - only used if no more important parameters are defined
+
+`date`
+  - returns only holidays for given date
+  - date must be formatted in ISO 8601 format [more info here](https://www.iso.org/iso-8601-date-and-time-format.html)
+  - eg. `date=2021-12-25`
+  - if defined year and rangeStart|rangeEnd parameters are ignored
+
+
+`rangeStart|rangeEnd`
+  - returns holidays in given range with both ends being inclusive
+  - if either limit isn't defined it is assumed to be up to or all from given limit (if rangeStart isn't defined all holidays before rangeEnd are returned and vice-verse)
+  - dates must be formatted in ISO 8601 format [more info here](https://www.iso.org/iso-8601-date-and-time-format.html)
+  - eg. `rangeStart=2021-12-25&rangeEnd=2023-01-23`, `rangeStart=2023-01-20`
+  - if defined year parameter is ignored
+
+`stateHoliday`
+  - if set true only holidays that are tagged as state holidays are returned, similar for if set false, if not set all holidays are returned
+  - eg. `stateHoliday=true`, `stateHoliday=false`
+
+`religiousHoliday`
+  - if set true only holidays that are tagged as religious holidays are returned, similar for if set false, if not set all holidays are returned
+  - eg. `religiousHoliday=true`, `religiousHoliday=false`
+
+#### Paging
+`pageSize`
+  - returns at most pageSize number of holidays
+  - eg. `pageSize=20`
+  - only applied if page is defined as well, by default set to 20
+
+`page`
+  - returns nth page of holidays, paging starts at 0
+  - eg. `page=0`
+
+## Response
+
+By default, responses are returned as a json array 
 ```
-PSQL_HOST=localhost
+[{
-PSQL_PORT=5432
+  id: string;
-PSQL_USER=template
+  date: string(ISO 8601);
-PSQL_PASSWORD=templatePassword
+  name: string;
-PSQL_DB=template
+  description: string;
+  isStateHoliday: boolean;
+  isReligiousHoliday: boolean;
+},...]
+```
+eg.
+```
+[{
+    "id": "74a2a769-abf2-45d4-bdc4-442bbcc89138",
+    "date": "2023-12-25",
+    "name": "Christmas",
+    "description": "TBD",
+    "isStateHoliday": true,
+    "isReligiousHoliday": true
+}]
 ```
 
-Also, database is required for template to start, so you can start it with `docker compose up -d`
+But can be returned as XML or CSV by setting appropriate `Accept` header (application/xml, text/xml or text/csv)
+
+XML Response 
+```
+<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
+<Holidays>
+    <Holiday id="74a2a769-abf2-45d4-bdc4-442bbcc89138" date="2023-12-25" isReligious="true" isState="true">
+        <name>Christmas</name>
+        <description>TBD</description>
+    </Holiday>
+</Holidays>
+```
+
+CSV Response
+```
+id,date,name,description,is_state_holiday,is_religious_holiday
+74a2a769-abf2-45d4-bdc4-442bbcc89138,2023-12-25,Christmas,TBD,true,true
+```

db/dev/v1_0.sql

@@ -0,0 +1,30 @@
+CREATE TABLE IF NOT EXISTS "holiday"
+(
+    id uuid,
+    country char(2),
+    date date,
+    name varchar(64),
+    description varchar(512),
+    is_state boolean,
+    is_religious boolean
+);
+
+INSERT INTO "holiday" (id, country, date, name, description, is_state, is_religious)
+VALUES
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b671', 'HR', '2023-01-01', 'Nova godina', '', true, false),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b672', 'HR', '2023-01-06', 'Sveta tri kralja', '', true, true),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b673', 'HR', '2023-04-09', 'Uskrs', '', true, true),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b674', 'HR', '2023-04-10', 'Uskrsni ponedjeljak', '', true, true),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b675', 'HR', '2023-05-01', 'Praznik rada', '', true, false),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b676', 'HR', '2023-05-30', 'Dan državnosti', '', true, false),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b677', 'HR', '2023-06-08', 'Tijelovo', '', true, true),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b678', 'HR', '2023-06-22', 'Dan antifašističke borbe', '', true, false),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b679', 'HR', '2023-08-05', 'Dan pobjede i domovinske zahvalnost', '', true, false),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b680', 'HR', '2023-08-15', 'Velika gospa', '', true, true),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b681', 'HR', '2023-11-01', 'Dan svih svetih', '', true, true),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b682', 'HR', '2023-11-18', 'Dan sjećanja na žrtve Domovinskog rata', '', true, false),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b683', 'HR', '2023-12-25', 'Božić', '', true, true),
+    ('096ca6c4-5c04-47a4-b363-4b4cc6f6b684', 'HR', '2023-12-26', 'Štefanje', '', true, true);
+
+
+

docker-compose-deploy.yml

@@ -2,14 +2,14 @@ version: '3.1'
 
 services:
     backend:
-        image: registry.bbr-dev.info/template/backend:latest
+        image: registry.bbr-dev.info/holiday-api/backend:latest
         restart: on-failure
         depends_on:
             - database
         ports:
             - "5281:5281"
         networks:
-            - template
+            - holiday
         env_file:
             - .env.docker
 
@@ -18,11 +18,11 @@ services:
         ports:
             - "5432:5432"
         environment:
-            - POSTGRES_USER=template
+            - POSTGRES_USER=holiday
-            - POSTGRES_PASSWORD=templatePassword
+            - POSTGRES_PASSWORD=holidayPassword
-            - POSTGRES_DB=template
+            - POSTGRES_DB=holiday
         networks:
-            - template
+            - holiday
 
 networks:
-    template:
+    holiday:

docker-compose.yml

@@ -6,6 +6,6 @@ services:
         ports:
             - "5432:5432"
         environment:
-            - POSTGRES_USER=template
+            - POSTGRES_USER=holiday
-            - POSTGRES_PASSWORD=templatePassword
+            - POSTGRES_PASSWORD=holidayPassword
-            - POSTGRES_DB=template
+            - POSTGRES_DB=holiday

dockerfile

@@ -10,10 +10,10 @@ COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
 ENV CGO_ENABLED=0
-RUN go build -tags timetzdata template
+RUN go build -tags timetzdata holiday-api
 
 ### Stage 2: Run ###
 FROM scratch
 COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
-COPY --from=go-build /root/template /usr/bin/template
+COPY --from=go-build /root/holiday-api /usr/bin/holiday-api
-ENTRYPOINT ["template"]
+ENTRYPOINT ["holiday-api"]

go.mod

@@ -1,4 +1,4 @@
-module template
+module holiday-api
 
 go 1.19
 

handlers.go

@@ -0,0 +1,159 @@
+package main
+
+import (
+	"encoding/xml"
+	"fmt"
+	"github.com/google/uuid"
+	"holiday-api/holiday"
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+)
+
+func getHolidays(service holiday.Service) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if err := r.ParseForm(); err != nil {
+			log.Printf("Failed parsing params: %v", err)
+		}
+		paging := holiday.Paging{
+			PageSize: readInt(r, "pageSize", 1000),
+			Page:     readInt(r, "page", 0),
+		}
+		search := holiday.Search{
+			Country:          r.Form.Get("country"),
+			Year:             readIntNullable(r, "year"),
+			Date:             readDateNullable(r, "date"),
+			RangeStart:       readDateNullable(r, "rangeStart"),
+			RangeEnd:         readDateNullable(r, "rangeEnd"),
+			StateHoliday:     readBoolNullable(r, "stateHoliday"),
+			ReligiousHoliday: readBoolNullable(r, "religiousHoliday"),
+		}
+		holidays, err := service.Find(search, paging)
+		if err != nil {
+			render(w, r, 404, ErrorResponse{Created: time.Now(), Message: "failed fetching holidays"})
+		} else {
+			render(w, r, 200, mapHolidays(holidays))
+		}
+	}
+}
+
+type DateResponse struct{ time.Time }
+
+func (d DateResponse) MarshalJSON() ([]byte, error) {
+	return []byte("\"" + d.String() + "\""), nil
+}
+func (d DateResponse) String() string {
+	return fmt.Sprintf(`%04d-%02d-%02d`, d.Year(), d.Month(), d.Day())
+}
+
+type ErrorResponse struct {
+	XMLName xml.Name  `json:"-" xml:"Error"`
+	Created time.Time `json:"created" xml:"created"`
+	Message string    `json:"message" xml:"message"`
+	Code    int       `json:"-" xml:"-"`
+}
+
+type HolidayResponse struct {
+	XMLName  xml.Name              `json:"-" xml:"Holidays"`
+	Holidays []HolidayItemResponse `json:"holidays"`
+}
+
+type HolidayItemResponse struct {
+	XMLName            xml.Name     `json:"-" xml:"Holiday"`
+	Id                 uuid.UUID    `json:"id" xml:"id,attr"`
+	Date               DateResponse `json:"date" xml:"date,attr"`
+	Name               string       `json:"name" xml:"name"`
+	Description        string       `json:"description" xml:"description,omitempty"`
+	IsStateHoliday     bool         `json:"isStateHoliday" xml:"isState,attr"`
+	IsReligiousHoliday bool         `json:"isReligiousHoliday" xml:"isReligious,attr"`
+}
+
+type HolidaySingleResponse struct {
+	Id                 *uuid.UUID
+	Country            string
+	Date               DateResponse
+	Name               string
+	Description        string
+	IsStateHoliday     bool
+	IsReligiousHoliday bool
+}
+
+type HolidaySingleRequest struct {
+	Id                 *uuid.UUID
+	Country            string
+	Date               DateResponse
+	Name               string
+	Description        string
+	IsStateHoliday     bool
+	IsReligiousHoliday bool
+}
+
+func mapHolidays(holidays []holiday.Holiday) HolidayResponse {
+	var response = make([]HolidayItemResponse, 0, len(holidays))
+	for _, h := range holidays {
+		response = append(response, HolidayItemResponse{
+			Id:                 h.Id,
+			Date:               DateResponse{h.Date},
+			Name:               h.Name,
+			Description:        h.Description,
+			IsStateHoliday:     h.IsStateHoliday,
+			IsReligiousHoliday: h.IsReligiousHoliday,
+		})
+	}
+	return HolidayResponse{
+		Holidays: response,
+	}
+}
+
+func readDateNullable(r *http.Request, param string) *time.Time {
+	if r.Form.Has(param) {
+		var year, month, date int
+		count, err := fmt.Sscanf(r.Form.Get(param), "%d-%d-%d", &year, &month, &date)
+		if count < 3 {
+			log.Printf("failed reading %s: %v", param, err)
+			return nil
+		} else {
+			readDate := time.Date(year, time.Month(month), date, 0, 0, 0, 0, time.UTC)
+			return &readDate
+		}
+	} else {
+		return nil
+	}
+}
+
+func readIntNullable(r *http.Request, param string) *int {
+	if r.Form.Has(param) {
+		if value, err := strconv.Atoi(r.Form.Get(param)); err == nil {
+			return &value
+		} else {
+			return nil
+		}
+	} else {
+		return nil
+	}
+}
+
+func readBoolNullable(r *http.Request, param string) *bool {
+	if r.Form.Has(param) {
+		if value, err := strconv.ParseBool(r.Form.Get(param)); err == nil {
+			return &value
+		} else {
+			return nil
+		}
+	} else {
+		return nil
+	}
+}
+
+func readInt(r *http.Request, param string, defaultValue int) int {
+	if r.Form.Has(param) {
+		if value, err := strconv.Atoi(r.Form.Get(param)); err == nil {
+			return value
+		} else {
+			return defaultValue
+		}
+	} else {
+		return defaultValue
+	}
+}

holiday/model.go

@@ -0,0 +1,31 @@
+package holiday
+
+import (
+	"github.com/google/uuid"
+	"time"
+)
+
+type Holiday struct {
+	Id                 uuid.UUID `db:"id"`
+	Country            string    `db:"country"`
+	Date               time.Time `db:"date"`
+	Name               string    `db:"name"`
+	Description        string    `db:"description"`
+	IsStateHoliday     bool      `db:"is_state"`
+	IsReligiousHoliday bool      `db:"is_religious"`
+}
+
+type Paging struct {
+	PageSize int
+	Page     int
+}
+
+type Search struct {
+	Country          string
+	Year             *int
+	Date             *time.Time
+	RangeStart       *time.Time
+	RangeEnd         *time.Time
+	StateHoliday     *bool
+	ReligiousHoliday *bool
+}

holiday/service.go

@@ -0,0 +1,111 @@
+package holiday
+
+import (
+	"github.com/google/uuid"
+	"github.com/jmoiron/sqlx"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Service struct {
+	DB *sqlx.DB
+}
+
+func (s *Service) Find(search Search, paging Paging) ([]Holiday, error) {
+	var holidays []Holiday
+	var err error
+	if search.Date != nil {
+		holidays, err = s.findByDate(*search.Date, search.StateHoliday, search.ReligiousHoliday, search.Country)
+	} else if search.RangeStart != nil || search.RangeEnd != nil {
+		holidays, err = s.findForRange(getDateOrDefault(search.RangeStart, 1000), getDateOrDefault(search.RangeEnd, 3000), search.StateHoliday, search.ReligiousHoliday, search.Country)
+	} else if search.Year != nil {
+		holidays, err = s.findByYear(*search.Year, search.StateHoliday, search.ReligiousHoliday, search.Country)
+	} else {
+		holidays, err = s.find(search.StateHoliday, search.ReligiousHoliday, search.Country)
+	}
+	if err != nil {
+		return nil, err
+	}
+	return s.paginate(holidays, paging), err
+}
+
+func (s *Service) FindById(id uuid.UUID) (Holiday, error) {
+	var holiday Holiday
+	return holiday, s.DB.Get(&holiday, `SELECT * FROM "holiday" WHERE "id" = $1;`, id)
+}
+
+func (s *Service) findByDate(date time.Time, isState *bool, isReligious *bool, country string) ([]Holiday, error) {
+	var holidays []Holiday
+	return holidays, s.DB.Select(&holidays, `SELECT * FROM "holiday" WHERE "date" = $1 AND country = $2 `+s.filter(isState, isReligious)+";", date, country)
+}
+
+func (s *Service) findForRange(rangeStart time.Time, rangeEnd time.Time, isState *bool, isReligious *bool, country string) ([]Holiday, error) {
+	var holidays []Holiday
+	return holidays, s.DB.Select(&holidays, `SELECT * FROM "holiday" WHERE "date" BETWEEN $1 AND $2 AND country = $3`+s.filter(isState, isReligious)+";", rangeStart, rangeEnd, country)
+}
+
+func (s *Service) findByYear(year int, isState *bool, isReligious *bool, country string) ([]Holiday, error) {
+	var holidays []Holiday
+	return holidays, s.DB.Select(&holidays, `SELECT * FROM "holiday" WHERE extract(year from "date") = $1 AND country = $2 `+s.filter(isState, isReligious)+";", year, country)
+}
+
+func (s *Service) find(isState *bool, isReligious *bool, country string) ([]Holiday, error) {
+	var holidays []Holiday
+	return holidays, s.DB.Select(&holidays, `SELECT * FROM "holiday" WHERE country = $1 `+s.filter(isState, isReligious)+";", country)
+}
+
+func (s *Service) paginate(holidays []Holiday, paging Paging) []Holiday {
+	start := paging.Page * paging.PageSize
+	end := (paging.Page + 1) * paging.PageSize
+	if end < len(holidays) {
+		return holidays[start:end]
+	} else if start < len(holidays) {
+		return holidays[start:]
+	} else {
+		return []Holiday{}
+	}
+}
+
+func (s *Service) filter(isState *bool, isReligious *bool) string {
+	var filters []string
+	if isState != nil {
+		filters = append(filters, "is_state = "+strconv.FormatBool(*isState))
+	}
+	if isReligious != nil {
+		filters = append(filters, "is_religious = "+strconv.FormatBool(*isReligious))
+	}
+	if len(filters) > 0 {
+		return " AND " + strings.Join(filters, " AND ")
+	} else {
+		return ""
+	}
+}
+
+func (s *Service) Update(holiday Holiday) (Holiday, error) {
+	_, err := s.DB.Exec(`UPDATE holiday SET "country" = $1, "name" = $2, "description" = $3, "date" = $4, "is_state"=$5, "is_religious"=$6 WHERE "id" = $7`,
+		&holiday.Country, &holiday.Name, &holiday.Description, &holiday.Date, &holiday.IsStateHoliday, &holiday.IsReligiousHoliday, &holiday.Id,
+	)
+	return holiday, err
+}
+
+func (s *Service) Create(holiday Holiday) (Holiday, error) {
+	holiday.Id = uuid.Must(uuid.NewRandom())
+	_, err := s.DB.Exec(`INSERT INTO holiday (id, country, name, description, date, is_state, is_religious) values ($1, $2, $3, $4, $5, $6, $7)`,
+		&holiday.Id, &holiday.Country, &holiday.Name, &holiday.Description, &holiday.Date, &holiday.IsStateHoliday, &holiday.IsReligiousHoliday,
+	)
+	return holiday, err
+}
+
+func (s *Service) Delete(id uuid.UUID) error {
+	_, err := s.DB.Exec(`DELETE FROM holiday WHERE "id" = $1`, &id)
+	return err
+}
+
+func getDateOrDefault(date *time.Time, year int) time.Time {
+	if date == nil {
+		return time.Date(year, 1, 1, 0, 0, 0, 0, time.UTC)
+	} else {
+		return *date
+	}
+}

main.go

@@ -2,19 +2,36 @@ package main
 
 import (
 	"embed"
+	"fmt"
 	"github.com/go-chi/chi"
 	"github.com/go-chi/chi/middleware"
+	"github.com/google/uuid"
 	"github.com/joho/godotenv"
+	_ "github.com/lib/pq"
+	"holiday-api/holiday"
+	"holiday-api/migration"
+	"html/template"
 	"log"
 	"net/http"
-	"template/migration"
+	"os"
+	"strconv"
+	"strings"
+	"time"
 )
 
 //go:embed db/dev/*.sql
 var devMigrations embed.FS
 
+//go:embed db/prod/*.sql
+var prodMigrations embed.FS
+
+var isDev = false
+
 func init() {
 	godotenv.Load()
+	if strings.Contains(os.Getenv("PROFILE"), "dev") {
+		isDev = true
+	}
 	log.SetPrefix("")
 	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
 }
@@ -24,7 +41,11 @@ func main() {
 	if err != nil {
 		log.Fatalf("couldn't connect to db: %v", err)
 	}
-	if err := migration.InitializeMigrations(client, devMigrations); err != nil {
+	migrationFolder := prodMigrations
+	if isDev {
+		migrationFolder = devMigrations
+	}
+	if err := migration.InitializeMigrations(client, migrationFolder); err != nil {
 		log.Fatalf("couldn't execute migrations: %v", err)
 	}
 
@@ -34,16 +55,183 @@ func main() {
 	r.Use(middleware.Logger)
 	r.Use(middleware.Recoverer)
 
-	r.Get("/", helloWorld)
+	holidayService := holiday.Service{client}
+
+	r.Get("/api/v1/holidays", getHolidays(holidayService))
+
+	r.Mount("/admin", adminDashboard(holidayService))
 
 	log.Fatal(http.ListenAndServe(":5281", r))
 }
 
-func helloWorld(w http.ResponseWriter, r *http.Request) {
+func adminDashboard(service holiday.Service) http.Handler {
-	response := struct {
+	r := chi.NewRouter()
-		Title   string `json:"title"`
-		Message string `json:"message"`
-	}{Title: "hello world", Message: "this is an example of response"}
 
-	render(w, r, http.StatusOK, response)
+	credentials := loadCredentials()
+	templates, err := template.New("").Funcs(template.FuncMap{
+		"boolcmp": func(value *bool, expected string) bool {
+			if value == nil {
+				return expected == "nil"
+			} else {
+				return (*value && expected == "true") || (!(*value) && expected == "false")
+			}
+		},
+		"deferint": func(value *int) int { return *value },
+	}).ParseFiles("templates/index.gohtml", "templates/holiday.gohtml", "templates/error.gohtml")
+	if err != nil {
+		log.Fatalf("couldn't load templates: %v", err)
+	}
+
+	r.Use(middleware.BasicAuth("/admin", credentials))
+
+	r.Get("/holiday", func(w http.ResponseWriter, r *http.Request) {
+		r.ParseForm()
+		id := r.FormValue("id")
+
+		response := HolidaySingleResponse{
+			Id:                 nil,
+			Country:            "",
+			Date:               DateResponse{time.Now()},
+			Name:               "",
+			Description:        "",
+			IsStateHoliday:     true,
+			IsReligiousHoliday: false,
+		}
+
+		if id != "" {
+			if h, err := service.FindById(uuid.Must(uuid.Parse(id))); err == nil {
+				response = HolidaySingleResponse{
+					Id:                 &h.Id,
+					Country:            h.Country,
+					Date:               DateResponse{h.Date},
+					Name:               h.Name,
+					Description:        h.Description,
+					IsStateHoliday:     h.IsStateHoliday,
+					IsReligiousHoliday: h.IsReligiousHoliday,
+				}
+			}
+		}
+		renderTemplate(w, r, 200, templates, "holiday.gohtml", response)
+	})
+
+	r.Post("/holiday/delete", func(w http.ResponseWriter, r *http.Request) {
+		r.ParseForm()
+		var id uuid.UUID
+		if i := r.FormValue("id"); i != "" {
+			id = uuid.MustParse(i)
+		} else {
+			log.Printf("Failed deleting holiday: missing id", err)
+			w.WriteHeader(500)
+			w.Write([]byte("There was an error"))
+		}
+		err := service.Delete(id)
+		if err != nil {
+			log.Printf("Failed deleting holiday: %v", err)
+			w.WriteHeader(500)
+			w.Write([]byte("There was an error"))
+		} else {
+			w.Header().Add("Location", "/admin")
+			w.WriteHeader(http.StatusSeeOther)
+			w.Write([]byte{})
+		}
+	})
+
+	r.Post("/holiday", func(w http.ResponseWriter, r *http.Request) {
+		r.ParseForm()
+		var id *uuid.UUID = nil
+		if i := r.FormValue("id"); i != "" {
+			temp := uuid.MustParse(i)
+			id = &temp
+		}
+		name := strings.TrimSpace(r.FormValue("name"))
+		description := strings.TrimSpace(r.FormValue("description"))
+		isStateHoliday := parseCheckbox(r.FormValue("stateHoliday"))
+		isReligiousHoliday := parseCheckbox(r.FormValue("religiousHoliday"))
+		date := parseDate(r.FormValue("date"))
+		country := r.FormValue("country")
+
+		hol := holiday.Holiday{
+			Country:            country,
+			Date:               date,
+			Name:               name,
+			Description:        description,
+			IsStateHoliday:     isStateHoliday,
+			IsReligiousHoliday: isReligiousHoliday,
+		}
+
+		var err error
+		if id != nil {
+			hol.Id = *id
+			hol, err = service.Update(hol)
+		} else {
+			hol, err = service.Create(hol)
+		}
+		if err != nil {
+			log.Printf("Failed updating or creating holiday: %v", err)
+			w.WriteHeader(500)
+			w.Write([]byte("There was an error"))
+		} else {
+			w.Header().Add("Location", "/admin/holiday?id="+hol.Id.String())
+			w.WriteHeader(http.StatusSeeOther)
+			w.Write([]byte{})
+		}
+	})
+
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		r.ParseForm()
+		country := r.FormValue("country")
+		if country == "" {
+			country = "HR"
+		}
+		var stateHoliday *bool = nil
+		if h := r.FormValue("stateHoliday"); h != "" {
+			if hol, err := strconv.ParseBool(h); err == nil {
+				stateHoliday = &hol
+			}
+		}
+		var religiousHoliday *bool = nil
+		if h := r.FormValue("religiousHoliday"); h != "" {
+			if hol, err := strconv.ParseBool(h); err == nil {
+				religiousHoliday = &hol
+			}
+		}
+		year := time.Now().Year()
+		if y := r.FormValue("year"); y != "" {
+			if yr, err := strconv.ParseInt(y, 10, 64); err == nil {
+				year = int(yr)
+			}
+		}
+
+		search := holiday.Search{Year: &year, Country: country, StateHoliday: stateHoliday, ReligiousHoliday: religiousHoliday}
+
+		holidays, _ := service.Find(search, holiday.Paging{PageSize: 100})
+		holidayResponse := mapHolidays(holidays)
+
+		response := map[string]any{}
+		response["holidays"] = holidayResponse
+		response["search"] = search
+
+		renderTemplate(w, r, 200, templates, "index.gohtml", response)
+	})
+
+	return r
+}
+
+func parseDate(date string) time.Time {
+	var year, month, day int
+	fmt.Sscanf(date, "%d-%d-%d", &year, &month, &day)
+	return time.Date(year, time.Month(month), day, 0, 0, 0, 0, time.UTC)
+}
+
+func parseCheckbox(value string) bool {
+	if value != "" {
+		return true
+	}
+	return false
+}
+
+func loadCredentials() map[string]string {
+	credentials := envMustExist("AUTH_KEY")
+	values := strings.Split(credentials, ":")
+	return map[string]string{values[0]: values[1]}
 }

makefile

@@ -10,17 +10,17 @@ setup:
 	go get
 
 docker-dev:
-	docker image build -t registry.bbr-dev.info/template/backend:$(VERSION)-dev .
+	docker image build -t registry.bbr-dev.info/holiday-api/backend:$(VERSION)-dev .
-	docker tag registry.bbr-dev.info/template/backend:$(VERSION)-dev registry.bbr-dev.info/template/backend:latest-dev
+	docker tag registry.bbr-dev.info/holiday-api/backend:$(VERSION)-dev registry.bbr-dev.info/holiday-api/backend:latest-dev
-	docker image push registry.bbr-dev.info/template/backend:$(VERSION)-dev
+	docker image push registry.bbr-dev.info/holiday-api/backend:$(VERSION)-dev
-	docker image push registry.bbr-dev.info/template/backend:latest-dev
+	docker image push registry.bbr-dev.info/holiday-api/backend:latest-dev
 	
 
 docker-prod:
-	docker image build -t registry.bbr-dev.info/template/backend:$(VERSION) .
+	docker image build -t registry.bbr-dev.info/holiday-api/backend:$(VERSION) .
-	docker tag registry.bbr-dev.info/template/backend:$(VERSION) registry.bbr-dev.info/template/backend:latest
+	docker tag registry.bbr-dev.info/holiday-api/backend:$(VERSION) registry.bbr-dev.info/holiday-api/backend:latest
-	docker image push registry.bbr-dev.info/template/backend:$(VERSION)
+	docker image push registry.bbr-dev.info/holiday-api/backend:$(VERSION)
-	docker image push registry.bbr-dev.info/template/backend:latest
+	docker image push registry.bbr-dev.info/holiday-api/backend:latest
 
 release:
 	git tag $(VERSION)
@@ -30,4 +30,4 @@ test:
 	go test ./...
 
 clean:
-	rm -rf template
+	rm -rf holiday-api

render.go

@@ -1,21 +1,58 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
+	"encoding/xml"
+	"html/template"
 	"log"
 	"net/http"
 )
 
-func render[T any](w http.ResponseWriter, r *http.Request, status int, response T) error {
+func renderTemplate[T any](w http.ResponseWriter, r *http.Request, status int, templates *template.Template, template string, response T) error {
-	if body, err := json.MarshalIndent(response, "", "  "); err == nil {
+	buffer := bytes.Buffer{}
-		w.Header().Add("content-type", "application/json")
+	if err := templates.Lookup(template).Execute(&buffer, response); err == nil {
+		w.Header().Add("content-type", "text/html; charset=utf-8")
 		w.WriteHeader(status)
-		_, err = w.Write(body)
+		_, err = w.Write(buffer.Bytes())
 		return err
 	} else {
-		w.WriteHeader(http.StatusInternalServerError)
+		return onError(w, err)
-		log.Printf("couldn't parse response")
+	}
-		_, err = w.Write([]byte{})
+}
-		return err
+
+func onError(w http.ResponseWriter, err error) error {
+	w.WriteHeader(http.StatusInternalServerError)
+	log.Printf("failed writing response: %v", err)
+	_, _ = w.Write([]byte{})
+	return err
+}
+
+func render[T any](w http.ResponseWriter, r *http.Request, status int, response T) error {
+	switch r.Header.Get("accept") {
+	case "application/xml":
+		fallthrough
+	case "text/xml":
+		if body, err := xml.MarshalIndent(response, "", "  "); err == nil {
+			// we return the same type as requested
+			w.Header().Add("content-type", r.Header.Get("accept")+"; charset=utf-8")
+			w.WriteHeader(status)
+			_, err = w.Write([]byte(xml.Header))
+			_, err = w.Write(body)
+			return err
+		} else {
+			return onError(w, err)
+		}
+	case "application/json":
+		fallthrough
+	default:
+		if body, err := json.MarshalIndent(response, "", "  "); err == nil {
+			w.Header().Add("content-type", "application/json; charset=utf-8")
+			w.WriteHeader(status)
+			_, err = w.Write(body)
+			return err
+		} else {
+			return onError(w, err)
+		}
 	}
 }

templates/error.gohtml

@@ -0,0 +1,5 @@
+<html>
+<body>
+    <h1>Test for error</h1>
+</body>
+</html>

templates/holiday.gohtml

@@ -0,0 +1,44 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Holiday-api holiday</title>
+</head>
+<body>
+<h1>Holiday-api - {{if .Id}}Updating{{else}}Creating{{end}}</h1>
+<p>Page for creating or editing holidays</p>
+<a href="/admin">Back</a>
+<form method="post" action="/admin/holiday">
+    {{if .Id}}
+        <input type="hidden" id="id" name="id" value="{{.Id}}">
+    {{end}}
+
+    <label for="country">Country</label>
+    <select id="country" name="country">
+        <option value="HR" {{if eq .Country "HR"}}selected{{end}}>Croatia</option>
+        <option value="US" {{if eq .Country "US"}}selected{{end}}>USA</option>
+        <option value="GB" {{if eq .Country "GB"}}selected{{end}}>Great Britain</option>
+        <option value="FR" {{if eq .Country "FR"}}selected{{end}}>France</option>
+    </select>
+
+    <label for="name">Name</label>
+    <input type="text" id="name" name="name" value="{{.Name}}">
+
+    <label for="description">Description</label>
+    <textarea id="description" name="description">{{.Description}}</textarea>
+
+    <label for="date">Date</label>
+    <input type="date" id="date" name="date" value="{{.Date.String}}">
+
+    <label for="state-holiday">State holiday</label>
+    <input type="checkbox" id="state-holiday" name="stateHoliday" {{if .IsStateHoliday}}checked{{end}}>
+
+    <label for="religious-holiday">Religious holiday</label>
+    <input type="checkbox" id="religious-holiday" name="religiousHoliday" {{if .IsReligiousHoliday}}checked{{end}}>
+
+    <button type="submit">{{if .Id}}Update{{else}}Create{{end}}</button>
+</form>
+</body>
+</html>

templates/index.gohtml

@@ -0,0 +1,102 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Holiday-api</title>
+</head>
+<body>
+<h1>Holiday-api</h1>
+<p>Welcome to admin interface for holiday api</p>
+
+<div>
+    <a href="/admin/holiday">Add a holiday</a>
+</div>
+<div>
+    <form id="filter-holidays" action="/admin" method="get">
+        <label for="country">Country</label>
+        <select id="country" name="country">
+            <option value="HR" {{if eq .search.Country "HR"}}selected{{end}}>Croatia</option>
+            <option value="GB" {{if eq .search.Country "GB"}}selected{{end}}>Great Britain</option>
+            <option value="US" {{if eq .search.Country "US"}}selected{{end}}>USA</option>
+            <option value="FR" {{if eq .search.Country "FR"}}selected{{end}}>France</option>
+        </select>
+
+
+        <label for="year">Year</label>
+        <select id="year" name="year">
+            <option value="2020" {{if eq (deferint .search.Year) 2020}}selected{{end}}>2020</option>
+            <option value="2021" {{if eq (deferint .search.Year) 2021}}selected{{end}}>2021</option>
+            <option value="2022" {{if eq (deferint .search.Year) 2022}}selected{{end}}>2022</option>
+            <option value="2023" {{if eq (deferint .search.Year) 2023}}selected{{end}}>2023</option>
+            <option value="2024" {{if eq (deferint .search.Year) 2024}}selected{{end}}>2024</option>
+            <option value="2025" {{if eq (deferint .search.Year) 2025}}selected{{end}}>2025</option>
+            <option value="2026" {{if eq (deferint .search.Year) 2026}}selected{{end}}>2026</option>
+            <option value="2027" {{if eq (deferint .search.Year) 2027}}selected{{end}}>2027</option>
+        </select>
+
+        <div>
+            <label>State holiday</label>
+
+            <label for="state-holiday-true">True</label>
+            <input type="radio" value="true" {{if boolcmp .search.StateHoliday "true"}}checked{{end}} id="state-holiday-true" name="stateHoliday">
+
+            <label for="state-holiday-false">False</label>
+            <input type="radio" value="false" {{if boolcmp .search.StateHoliday "false"}}checked{{end}} id="state-holiday-false" name="stateHoliday">
+
+            <label for="state-holiday-any">Any</label>
+            <input type="radio" value="" {{if boolcmp .search.StateHoliday "nil"}}checked{{end}} id="state-holiday-any" name="stateHoliday">
+        </div>
+
+        <div>
+            <label>Religious holiday</label>
+
+            <label for="religious-holiday-true">True</label>
+            <input type="radio" value="true" {{if boolcmp .search.ReligiousHoliday "true"}}checked{{end}} id="religious-holiday-true" name="religiousHoliday">
+
+            <label for="religious-holiday-false">False</label>
+            <input type="radio" value="false" {{if boolcmp .search.ReligiousHoliday "false"}}checked{{end}} id="religious-holiday-false" name="religiousHoliday">
+
+            <label for="religious-holiday-any">Any</label>
+            <input type="radio" value="" {{if boolcmp .search.ReligiousHoliday "nil"}}checked{{end}} id="religious-holiday-any" name="religiousHoliday">
+
+        </div>
+
+        <button type="submit">Search</button>
+    </form>
+</div>
+<div>
+    <table>
+        <thead>
+            <tr>
+                <th>Name</th>
+                <th>Description</th>
+                <th>Date</th>
+                <th>State holiday</th>
+                <th>Religious holiday</th>
+                <th></th>
+            </tr>
+        </thead>
+        <tbody>
+        {{range $entry := .holidays.Holidays}}
+            <tr>
+                <td>{{$entry.Name}}</td>
+                <td>{{$entry.Description}}</td>
+                <td>{{$entry.Date.Format "2006-01-02"}}</td>
+                <td>{{$entry.IsStateHoliday}}</td>
+                <td>{{$entry.IsReligiousHoliday}}</td>
+                <td>
+                    <a href="/admin/holiday?id={{$entry.Id}}">Edit</a>
+                    <form action="/admin/holiday/delete" method="post">
+                        <input id="id" type="hidden" name="id" value="{{$entry.Id}}">
+                        <button type="submit">Delete</button>
+                    </form>
+                </td>
+            </tr>
+        {{end}}
+        </tbody>
+    </table>
+</div>
+</body>
+</html>