feat(invoice): add send route

internal/api/httpinvoce/controller.go

@@ -0,0 +1,99 @@
+package httpinvoce
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"time"
+
+	"git.schreifuchs.ch/lou-taylor/accounting/internal/email"
+)
+
+const bufSize = 1024 * 1024 // 1Mib
+
+func (s Service) createInvoice(w http.ResponseWriter, r *http.Request) {
+	var req invoiceReq
+
+	err := json.NewDecoder(r.Body).Decode(&req)
+	if err != nil {
+		s.sendErrf(w, http.StatusBadRequest, "cannot read body: %v", err)
+		return
+	}
+
+	repos, err := req.GetRepos()
+	if err != nil {
+		s.sendErr(w, 500, err.Error())
+		return
+	}
+
+	invoice, err := s.invoice.Generate(req.Creditor, req.Debtor, req.DurationThreshold, req.HourlyRate, repos)
+	if err != nil {
+		log.Println("error while processing invoice:", err)
+		fmt.Fprint(w, "internal server error")
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Content-type", "application/pdf")
+	w.Header().Set(
+		"Content-Disposition",
+		fmt.Sprintf("attachment; filename=\"%s\"", invoiceName()),
+	)
+
+	_, err = io.Copy(w, invoice)
+	if err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+}
+
+func (s Service) sendInvoice(w http.ResponseWriter, r *http.Request) {
+	var req sendReq
+
+	err := json.NewDecoder(r.Body).Decode(&req)
+	if err != nil {
+		s.sendErrf(w, http.StatusBadRequest, "cannot read body: %v", err)
+		return
+	}
+
+	repos, err := req.Invoice.GetRepos()
+	if err != nil {
+		s.sendErr(w, 500, err.Error())
+		return
+	}
+	invoice, err := s.invoice.Generate(req.Invoice.Creditor, req.Invoice.Debtor, req.Invoice.DurationThreshold, req.Invoice.HourlyRate, repos)
+	if err != nil {
+		s.sendErr(w, http.StatusInternalServerError, "error while processing invoice:", err)
+		return
+	}
+
+	invoiceData, err := io.ReadAll(invoice)
+	if err != nil {
+		s.sendErrf(w, http.StatusInternalServerError, "error while creating pdf: %v", err)
+		return
+	}
+
+	mail := req.ToEMail()
+	mail.Attachments = append(mail.Attachments, email.Attachment{
+		Name:     invoiceName(),
+		MimeType: "application/pdf",
+		Content:  bytes.NewReader(invoiceData),
+	})
+
+	err = s.mail.Send(mail)
+	if err != nil {
+		s.sendErrf(w, http.StatusInternalServerError, "error while sending mail: %v", err)
+		return
+	}
+
+	_, err = w.Write(invoiceData)
+	if err != nil {
+		s.sendErr(w, http.StatusInternalServerError, "")
+	}
+}
+
+func invoiceName() string {
+	return fmt.Sprintf("%s_invoice.pdf", time.Now().Format("20060102"))
+}