feat: better debug logs

.gitignore

@@ -1,2 +1,5 @@
 config.json
 lou-taylor.json
+index.html
+invoice.pdf
+

AGENTS.md

@@ -25,6 +25,22 @@ Alternatively, you can use Docker for a containerized environment:
 docker-compose up --build
 ```
 
+## Writing Tests
+
+All tests are written using the go standard library and are table driven.
+In this application no libraries like testify are used. Mocks are written in
+the test file using this schema:
+
+```go
+type Mock struct {
+	Foo func (string) string
+}
+
+func (m Mock) Foo(in string) string {
+	return m.Foo(in)
+}
+```
+
 ## Running Tests
 
 To run all tests for the project, use the following command:

go.mod

@@ -6,22 +6,26 @@ require (
 	code.gitea.io/sdk/gitea v0.21.0
 	github.com/caarlos0/env/v10 v10.0.0
 	github.com/gomarkdown/markdown v0.0.0-20250810172220-2e2c11897d1a
+	github.com/itzg/go-flagsfiller v1.16.0
 	github.com/jedib0t/go-pretty/v6 v6.6.8
 	github.com/jordan-wright/email v4.0.1-0.20210109023952-943e75fe5223+incompatible
 	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
 	github.com/starwalkn/gotenberg-go-client/v8 v8.11.0
-	github.com/itzg/go-flagsfiller v1.16.0
 )
 
 require (
 	github.com/42wim/httpsig v1.2.3 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/davidmz/go-pageant v1.0.2 // indirect
 	github.com/go-fed/httpsig v1.1.0 // indirect
 	github.com/hashicorp/go-version v1.7.0 // indirect
 	github.com/iancoleman/strcase v0.3.0 // indirect
 	github.com/mattn/go-runewidth v0.0.16 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/stretchr/objx v0.5.2 // indirect
 	golang.org/x/crypto v0.41.0 // indirect
 	golang.org/x/sys v0.35.0 // indirect
 	golang.org/x/text v0.28.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -31,8 +31,12 @@ github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e h1:MRM5ITcdelLK2j1vwZ3Je0FKVCfqOLp5zO6trqMLYs0=
 github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e/go.mod h1:XV66xRDqSt+GTGFMVlhk3ULuV0y9ZmzeVGR4mloJI3M=
+github.com/spf13/pflag v1.0.6 h1:jFzHGLGAlb3ruxLB8MhbI6A8+AQX/2eW4qeyNZXNp2o=
+github.com/spf13/pflag v1.0.6/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/starwalkn/gotenberg-go-client/v8 v8.11.0 h1:9hKCcoWegZ0yrZ0tEl5gKlMyH2YraYO0R7zDyL0ZL/U=
 github.com/starwalkn/gotenberg-go-client/v8 v8.11.0/go.mod h1:5q9nAJ3/lub4hSCT6QYl8cOjnfQ/B+spEzC4TAPVXd8=
+github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -55,5 +59,7 @@ golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
 golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/api/httpinvoce/controller.go

@@ -31,6 +31,7 @@ func (s Service) createInvoice(w http.ResponseWriter, r *http.Request) {
 
 	opts := invoice.DefaultOptions
 	opts.Mindur = time.Duration(req.DurationThreshold)
+	opts.CustomTemplate = req.CustomTemplate
 	invoice, report, err := s.invoice.Generate(req.Creditor, &req.Debtor, req.HourlyRate, repos, &opts)
 	if err != nil {
 		s.sendErr(w, http.StatusInternalServerError, "internal server error")
@@ -71,6 +72,7 @@ func (s Service) sendInvoice(w http.ResponseWriter, r *http.Request) {
 
 	opts := invoice.DefaultOptions
 	opts.Mindur = time.Duration(req.Invoice.DurationThreshold)
+	opts.CustomTemplate = req.Invoice.CustomTemplate
 	invoice, report, err := s.invoice.Generate(req.Invoice.Creditor, &req.Invoice.Debtor, req.Invoice.HourlyRate, repos, &opts)
 	if err != nil {
 		s.sendErr(w, http.StatusInternalServerError, "error while processing invoice:", err)

internal/api/httpinvoce/controller_test.go

@@ -65,14 +65,14 @@ func (s SendReq) ToEMail() email.Mail {
 
 // MockInvoiceService mocks the invoice.Service interface
 type MockInvoiceService struct {
-	GenerateFunc func(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, *report.Report, error)
+	GenerateFunc func(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, report.Report, error)
 }
 
-func (m *MockInvoiceService) Generate(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, *report.Report, error) {
+func (m *MockInvoiceService) Generate(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, report.Report, error) {
 	if m.GenerateFunc != nil {
 		return m.GenerateFunc(creditor, debtor, hourlyRate, repos, opts)
 	}
-	return nil, &report.Report{}, nil
+	return nil, report.Report{}, nil
 }
 
 // MockEmailService mocks the email.Service interface
@@ -94,7 +94,7 @@ func TestCreateInvoice(t *testing.T) {
 	tests := []struct {
 		name           string
 		requestBody    InvoiceReq
-		mockGenerate   func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error)
+		mockGenerate   func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error)
 		expectedStatus int
 		expectedBody   string // For error messages or specific content
 	}{
@@ -107,7 +107,7 @@ func TestCreateInvoice(t *testing.T) {
 				HourlyRate:        100,
 				Repos:             []string{"owner/repo1"},
 			},
-			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error) {
+			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error) {
 				pdfContent := "mock PDF content"
 				// Create a report with a positive total duration
 				mockReport := report.New([]issue.Issue{{Duration: time.Hour}}, model.Entity{}, &model.Entity{}, 0)
@@ -138,8 +138,8 @@ func TestCreateInvoice(t *testing.T) {
 				HourlyRate:        100,
 				Repos:             []string{"owner/repo1"},
 			},
-			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error) {
+			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error) {
-				return nil, nil, errors.New("failed to generate invoice")
+				return nil, report.Report{}, errors.New("failed to generate invoice")
 			},
 			expectedStatus: http.StatusInternalServerError,
 			expectedBody:   "internal server error",
@@ -153,7 +153,7 @@ func TestCreateInvoice(t *testing.T) {
 				HourlyRate:        100,
 				Repos:             []string{"owner/repo1"},
 			},
-			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error) {
+			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error) {
 				// Create a report with zero total duration
 				mockReport := report.New([]issue.Issue{}, model.Entity{}, &model.Entity{}, 0)
 				return io.NopCloser(bytes.NewReader([]byte("mock PDF content"))), mockReport, nil
@@ -166,7 +166,7 @@ func TestCreateInvoice(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			mockInvoiceService := &MockInvoiceService{
-				GenerateFunc: func(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, *report.Report, error) {
+				GenerateFunc: func(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, report.Report, error) {
 					if opts == nil {
 						opts = &invoice.DefaultOptions
 					}
@@ -201,7 +201,7 @@ func TestSendInvoice(t *testing.T) {
 	tests := []struct {
 		name           string
 		requestBody    SendReq
-		mockGenerate   func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error)
+		mockGenerate   func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error)
 		mockSend       func(mail email.Mail) error
 		expectedStatus int
 		expectedBody   string
@@ -220,7 +220,7 @@ func TestSendInvoice(t *testing.T) {
 					Repos:             []string{"owner/repo1"},
 				},
 			},
-			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error) {
+			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error) {
 				pdfContent := "mock PDF content for send"
 				mockReport := report.New([]issue.Issue{{Duration: time.Hour}}, model.Entity{}, &model.Entity{}, 0)
 				return io.NopCloser(bytes.NewReader([]byte(pdfContent))), mockReport, nil
@@ -245,8 +245,8 @@ func TestSendInvoice(t *testing.T) {
 					Repos:             []string{"owner/repo1"},
 				},
 			},
-			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error) {
+			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error) {
-				return nil, nil, errors.New("failed to generate invoice for send")
+				return nil, report.Report{}, errors.New("failed to generate invoice for send")
 			},
 			mockSend:       nil, // Not called
 			expectedStatus: http.StatusInternalServerError,
@@ -266,7 +266,7 @@ func TestSendInvoice(t *testing.T) {
 					Repos:             []string{"owner/repo1"},
 				},
 			},
-			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error) {
+			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error) {
 				pdfContent := "mock PDF content for send"
 				mockReport := report.New([]issue.Issue{{Duration: time.Hour}}, model.Entity{}, &model.Entity{}, 0)
 				return io.NopCloser(bytes.NewReader([]byte(pdfContent))), mockReport, nil
@@ -291,7 +291,7 @@ func TestSendInvoice(t *testing.T) {
 					Repos:             []string{"owner/repo1"},
 				},
 			},
-			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, *report.Report, error) {
+			mockGenerate: func(creditor model.Entity, debtor *model.Entity, durationThreshold time.Duration, hourlyRate float64, repos []invoice.Repo) (io.ReadCloser, report.Report, error) {
 				mockReport := report.New([]issue.Issue{}, model.Entity{}, &model.Entity{}, 0)
 				return io.NopCloser(bytes.NewReader([]byte("mock PDF content"))), mockReport, nil
 			},
@@ -303,7 +303,7 @@ func TestSendInvoice(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			mockInvoiceService := &MockInvoiceService{
-				GenerateFunc: func(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, *report.Report, error) {
+				GenerateFunc: func(creditor model.Entity, debtor *model.Entity, hourlyRate float64, repos []invoice.Repo, opts *invoice.Options) (io.ReadCloser, report.Report, error) {
 					if opts == nil {
 						opts = &invoice.DefaultOptions
 					}

internal/api/httpinvoce/model.go

@@ -18,6 +18,7 @@ type invoiceReq struct {
 	DurationThreshold jtype.Duration `json:"durationThreshold"`
 	HourlyRate        float64        `json:"hourlyRate"`
 	Repos             []string       `json:"repositories"`
+	CustomTemplate    string         `json:"template,omitempty"`
 }
 
 func (i invoiceReq) GetRepos() (repos []invoice.Repo, err error) {

internal/api/httpinvoce/resource.go

@@ -21,7 +21,7 @@ func New(log *slog.Logger, invoice invoicer, mail mailer) *Service {
 }
 
 type invoicer interface {
-	Generate(creditor model.Entity, deptor *model.Entity, rate float64, repos []invoice.Repo, opts *invoice.Options) (document io.ReadCloser, report *report.Report, err error)
+	Generate(creditor model.Entity, deptor *model.Entity, rate float64, repos []invoice.Repo, opts *invoice.Options) (document io.ReadCloser, report report.Report, err error)
 }
 
 type mailer interface {

pkg/invoice/invoice.go

@@ -9,7 +9,7 @@ import (
 	"git.schreifuchs.ch/lou-taylor/accounting/pkg/invoice/report"
 )
 
-func (s *Service) Generate(creditor model.Entity, deptor *model.Entity, rate float64, repos []Repo, config *Options) (document io.ReadCloser, r *report.Report, err error) {
+func (s *Service) Generate(creditor model.Entity, debtor *model.Entity, rate float64, repos []Repo, config *Options) (document io.ReadCloser, r report.Report, err error) {
 	if config == nil {
 		config = &DefaultOptions
 	}
@@ -26,20 +26,33 @@ func (s *Service) Generate(creditor model.Entity, deptor *model.Entity, rate flo
 			},
 		)
 		if err != nil {
-			return nil, nil, err
+			return nil, r, err
 		}
 
 		is = append(is, iss...)
 	}
 
-	is = filter(is, config.IssueFilter)
+	{
+		issueURLs := make([]string, 0, len(is))
+		for _, issue := range is {
+			issueURLs = append(issueURLs, issue.HTMLURL)
+		}
+		s.log.Debug("loaded all issues", "issueURLs", issueURLs)
+	}
+
+	is = s.filterIssues(is, config.IssueFilter)
+
 	issues := issue.FromGiteas(is, config.Mindur)
 	r = report.New(
 		issues,
 		creditor,
-		deptor,
+		debtor,
 		rate,
 	)
+
+	if len(config.CustomTemplate) > 1 {
+		r = r.WithTemplate(config.CustomTemplate)
+	}
 	html, err := r.ToHTML()
 	if err != nil {
 		return document, r, err
@@ -49,12 +62,14 @@ func (s *Service) Generate(creditor model.Entity, deptor *model.Entity, rate flo
 	return document, r, err
 }
 
-func filter[T any](slice []T, ok func(T) bool) []T {
+func (s *Service) filterIssues(slice []*gitea.Issue, ok func(*gitea.Issue) bool) []*gitea.Issue {
-	out := make([]T, 0, len(slice))
+	out := make([]*gitea.Issue, 0, len(slice))
 
-	for _, item := range slice {
+	for _, issue := range slice {
-		if ok(item) {
+		if ok(issue) {
-			out = append(out, item)
+			out = append(out, issue)
+		} else {
+			s.log.Debug("filter out issue", "issueURL", issue.HTMLURL)
 		}
 	}
 

pkg/invoice/invoice_test.go

@@ -0,0 +1,163 @@
+package invoice
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"log/slog"
+	"strings"
+	"testing"
+	"time"
+
+	"code.gitea.io/sdk/gitea"
+	"git.schreifuchs.ch/lou-taylor/accounting/pkg/invoice/model"
+)
+
+// MockGiteaClient is a mock implementation of the GiteaClient interface.
+type MockGiteaClient struct {
+	ListRepoIssuesFunc func(owner, repo string, opt gitea.ListIssueOption) ([]*gitea.Issue, *gitea.Response, error)
+}
+
+func (m *MockGiteaClient) ListRepoIssues(owner, repo string, opt gitea.ListIssueOption) ([]*gitea.Issue, *gitea.Response, error) {
+	if m.ListRepoIssuesFunc != nil {
+		return m.ListRepoIssuesFunc(owner, repo, opt)
+	}
+	return nil, nil, errors.New("ListRepoIssuesFunc not implemented")
+}
+
+// MockPdfGenerator is a mock implementation of the PdfGenerator interface.
+type MockPdfGenerator struct {
+	HtmlToPdfFunc func(html string) (io.ReadCloser, error)
+}
+
+func (m *MockPdfGenerator) HtmlToPdf(html string) (io.ReadCloser, error) {
+	if m.HtmlToPdfFunc != nil {
+		return m.HtmlToPdfFunc(html)
+	}
+	return nil, errors.New("HtmlToPdfFunc not implemented")
+}
+
+func TestGenerate(t *testing.T) {
+	creditor := model.Entity{
+		Name: "creditor",
+	}
+	debtor := model.Entity{
+		Name: "deptor",
+	}
+	rate := 100.0
+	repos := []Repo{
+		{Owner: "owner", Repo: "repo"},
+	}
+
+	testCases := []struct {
+		name          string
+		setupMocks    func(*MockGiteaClient, *MockPdfGenerator)
+		config        *Options
+		expectedError string
+	}{
+		{
+			name: "successful generation",
+			setupMocks: func(g *MockGiteaClient, p *MockPdfGenerator) {
+				g.ListRepoIssuesFunc = func(owner, repo string, opt gitea.ListIssueOption) ([]*gitea.Issue, *gitea.Response, error) {
+					return []*gitea.Issue{
+						{ID: 1, Title: "Test Issue", Body: "```info\nduration: 1h\n```"},
+					}, &gitea.Response{}, nil
+				}
+				p.HtmlToPdfFunc = func(html string) (io.ReadCloser, error) {
+					return io.NopCloser(bytes.NewReader([]byte("pdf"))), nil
+				}
+			},
+			config:        &DefaultOptions,
+			expectedError: "",
+		},
+		{
+			name: "gitea error",
+			setupMocks: func(g *MockGiteaClient, p *MockPdfGenerator) {
+				g.ListRepoIssuesFunc = func(owner, repo string, opt gitea.ListIssueOption) ([]*gitea.Issue, *gitea.Response, error) {
+					return nil, nil, errors.New("gitea error")
+				}
+			},
+			config:        &DefaultOptions,
+			expectedError: "gitea error",
+		},
+		{
+			name: "pdf error",
+			setupMocks: func(g *MockGiteaClient, p *MockPdfGenerator) {
+				g.ListRepoIssuesFunc = func(owner, repo string, opt gitea.ListIssueOption) ([]*gitea.Issue, *gitea.Response, error) {
+					return []*gitea.Issue{
+						{ID: 1, Title: "Test Issue", Body: "```info\nduration: 1h\n```"},
+					}, &gitea.Response{}, nil
+				}
+				p.HtmlToPdfFunc = func(html string) (io.ReadCloser, error) {
+					return nil, errors.New("pdf error")
+				}
+			},
+			config:        &DefaultOptions,
+			expectedError: "pdf error",
+		},
+		{
+			name: "no issues",
+			setupMocks: func(g *MockGiteaClient, p *MockPdfGenerator) {
+				g.ListRepoIssuesFunc = func(owner, repo string, opt gitea.ListIssueOption) ([]*gitea.Issue, *gitea.Response, error) {
+					return []*gitea.Issue{}, &gitea.Response{}, nil
+				}
+				p.HtmlToPdfFunc = func(html string) (io.ReadCloser, error) {
+					return io.NopCloser(bytes.NewReader([]byte("pdf"))), nil
+				}
+			},
+			config:        &DefaultOptions,
+			expectedError: "",
+		},
+		{
+			name: "custom template",
+			setupMocks: func(g *MockGiteaClient, p *MockPdfGenerator) {
+				g.ListRepoIssuesFunc = func(owner, repo string, opt gitea.ListIssueOption) ([]*gitea.Issue, *gitea.Response, error) {
+					return []*gitea.Issue{
+						{ID: 1, Title: "Test Issue", Body: "```info\nduration: 1h\n```"},
+					}, &gitea.Response{}, nil
+				}
+				p.HtmlToPdfFunc = func(html string) (io.ReadCloser, error) {
+					return io.NopCloser(bytes.NewReader([]byte("pdf"))), nil
+				}
+			},
+			config: &Options{
+				Mindur:         time.Minute * 15,
+				Since:          time.Now().AddDate(0, -1, 0),
+				Before:         time.Now(),
+				IssueState:     gitea.StateClosed,
+				IssueFilter:    func(i *gitea.Issue) bool { return true },
+				CustomTemplate: "custom template",
+			},
+			expectedError: "",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			giteaClient := new(MockGiteaClient)
+
+			pdfGenerator := new(MockPdfGenerator)
+			tc.setupMocks(giteaClient, pdfGenerator)
+
+			service := New(slog.Default(), giteaClient, pdfGenerator)
+			doc, _, err := service.Generate(creditor, &debtor, rate, repos, tc.config)
+
+			if tc.expectedError != "" {
+				if err == nil {
+					t.Fatalf("expected an error, but got none")
+				}
+				if !strings.Contains(err.Error(), tc.expectedError) {
+					t.Errorf("expected error to contain '%s', but got '%s'", tc.expectedError, err.Error())
+				}
+			} else {
+				if err != nil {
+					t.Fatalf("expected no error, but got: %v", err)
+				}
+				if doc == nil {
+					t.Fatal("expected a document, but got nil")
+				}
+			}
+		})
+	}
+}
+

pkg/invoice/report/assets/style.css

@@ -1,86 +1,141 @@
-@page {
+.markdown h1 {
-  size: A4;
+  font-size: 2.25em; /* relative to base 12pt */
-  padding: 2cm;
+  font-weight: 700; /* font-bold */
-}
+  margin-top: 1.5em;
-@page:first {
+  margin-bottom: 1em;
-  padding: 0;
-}
-@media print {
-  .page,
-  .page-break {
-    break-after: page;
-  }
 }
 
-.first-page {
+.markdown h2 {
-  margin-left: 2cm;
+  font-size: 1.875em;
-  margin-right: 2cm;
+  font-weight: 600;
+  margin-top: 1.25em;
+  margin-bottom: 0.75em;
 }
 
-body {
+.markdown h3 {
-  font-family: sans-serif;
+  font-size: 1.5em;
-  font-size: 12pt;
+  font-weight: 600;
-  color: #333;
+  margin-top: 1em;
-}
-
-section {
-  margin-bottom: 3em;
-}
-p {
-  margin-top: 0.25em;
   margin-bottom: 0.5em;
 }
 
-header {
+.markdown h4 {
-  display: flex;
+  font-size: 1.25em;
-  justify-content: space-between;
+  font-weight: 500;
-  margin-bottom: 40px;
+  margin-top: 0.75em;
+  margin-bottom: 0.5em;
+}
 
-  h2 {
+.markdown p {
+  margin-bottom: 1em;
+}
+
+.markdown a {
+  color: #2563eb;
+  text-decoration: none;
+}
+.markdown a:hover {
+  text-decoration: underline;
+}
+
+.markdown strong {
+  font-weight: 600;
+  color: #111827;
+}
+
+.markdown em {
+  font-style: italic;
+}
+
+.markdown code {
+  background-color: #f3f4f6;
+  font-family:
+    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
+    "Courier New", monospace;
+  font-size: 0.875em; /* relative to base 12pt */
+  padding: 0.125em 0.25em;
+  border-radius: 0.25em;
+}
+
+.markdown pre {
+  background-color: #111827;
+  color: #f3f4f6;
+  font-family:
+    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
+    "Courier New", monospace;
+  font-size: 0.875em;
+  padding: 1em;
+  border-radius: 0.5em;
+  overflow-x: auto;
+  margin-bottom: 1em;
+}
+
+.markdown blockquote {
+  border-left: 4px solid #d1d5db;
+  padding-left: 1em;
+  font-style: italic;
+  color: #4b5563;
+  margin-bottom: 1em;
+}
+
+.markdown ul {
+  list-style-type: disc;
+  padding-left: 1.5em;
+  margin-bottom: 1em;
   margin-top: 0;
-  }
-}
-h1 {
-  margin: 0;
-  font-size: 2em;
-}
-h2 {
-  margin-top: 0.5em;
 }
 
-table {
+.markdown ol {
+  list-style-type: decimal;
+  padding-left: 1.5em;
+  margin-bottom: 1em;
+  margin-top: 0;
+}
+
+.markdown li {
+  margin-bottom: 0.25em;
+  line-height: 1.625;
+}
+
+.markdown hr {
+  border: none;
+  border-top: 1px solid #d1d5db;
+  margin: 1.5em 0;
+}
+
+.markdown img {
+  max-width: 100%;
+  border-radius: 0.5em;
+  margin: 1em 0;
+}
+
+.markdown table {
   width: 100%;
   border-collapse: collapse;
-  margin-bottom: 20px;
+  margin: 1em 0;
-}
+  font-size: 0.875em; /* relative to base 12pt */
-table,
-th,
-td {
-  border: 1px solid #ccc;
-}
-th,
-td {
-  padding: 0.25em 0.5em;
-  text-align: left;
-}
-th {
-  background-color: #f2f2f2;
 }
 
-article {
+.markdown th,
-  margin-bottom: 20px;
+.markdown td {
+  border: 1px solid #d1d5db;
+  padding: 0.5em 0.25em;
 }
 
-.issue-title {
+.markdown th {
-  display: flex;
+  background-color: #f3f4f6;
-  justify-content: space-between;
+  font-weight: 600;
-  align-items: end;
+}
-
+
-  margin-top: 2em;
+/* Nested lists */
-  margin-bottom: 0.5em;
+.markdown ul ul {
-
+  list-style-type: circle;
-  h3,
+  padding-left: 1.5em;
-  p {
+  margin-top: 0.25em;
-    margin: 0;
+}
-  }
+
+.markdown ol ol {
+  list-style-type: lower-alpha;
+  padding-left: 1.5em;
+  margin-top: 0.25em;
 }

pkg/invoice/report/assets/template.html

@@ -5,93 +5,138 @@
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>Rechnung vom {{ .Date | date }}</title>
     <!-- <link href="css/style.css" rel="stylesheet" /> -->
+    <script>
+      {{ .Tailwind }}
+    </script>
+    <style>
+      @page {
+        size: A4;
+        padding: 2cm;
+      }
+      @page:first {
+        padding: 0;
+      }
+      @media print {
+        .page,
+        .page-break {
+          break-after: page;
+        }
+      }
+    </style>
     <style>
       {{ .Style }}
     </style>
-    <style>
-
-      {{.Invoice.CSS}}
-    </style>
   </head>
-  <body>
+  <body class="font-sans text-gray-800 text-[12pt]">
-    <header class="first-page" style="margin-top: 2cm">
+    <!-- Header -->
+    <header class="mx-[2cm] flex justify-between mb-10 mt-8">
       <div class="company">
-        <h2>{{ .Company.Name }}</h2>
+        <h2 class="text-2xl font-semibold">{{ .Company.Name }}</h2>
-        <p>
+        <p class="mt-2">
-          {{ .Company.Address.Street}} {{.Company.Address.Number}} <br />
+          {{ .Company.Address.Street }} {{ .Company.Address.Number }} <br />
           {{ .Company.Address.ZIPCode }} {{ .Company.Address.Place }} <br />
           {{ .Company.Contact }}
         </p>
-
-        <p></p>
       </div>
-      <div class="invoice-info">
+      <div class="invoice-info text-right">
         <p>
-          <strong>Rechnung:</strong> {{ .Invoice.Reference }} <br />
+          <span class="font-semibold">Rechnung:</span> {{ .Invoice.Reference }}
-          <strong>Datum:</strong> {{ .Date | date }} <br />
+          <br />
+          <span class="font-semibold">Datum:</span> {{ .Date | date }} <br />
         </p>
       </div>
     </header>
-    <section class="client first-page">
+
-      <h2>Rechnung an:</h2>
+    <!-- Client Info -->
+    <section class="client mx-[2cm] mb-12">
+      <h2 class="text-xl font-semibold mb-2">Rechnung an:</h2>
       <p>
         {{ .Client.Name }} <br />
-        {{ .Client.Address.Street}} {{.Client.Address.Number}} <br />
+        {{ .Client.Address.Street }} {{ .Client.Address.Number }} <br />
         {{ .Client.Address.ZIPCode }} {{ .Client.Address.Place }} <br />
         {{ .Client.Contact }}
       </p>
     </section>
 
-    <section class="page p1 first-page">
+    <!-- Invoice Table -->
-      <article>
+    <section class="page mb-12">
-        <table>
+      <article class="mx-[2cm] overflow-x-auto">
-          <thead>
+        <table class="w-full border border-gray-300 border-collapse mb-5">
+          <thead class="bg-gray-200">
             <tr>
-              <th style="min-width: 3.5em">FID</th>
+              <th
-              <th>Name</th>
+                class="border border-gray-300 px-2 py-0.5 min-w-[3.5em] text-left"
-              <th>Aufwand</th>
+              >
-              <th style="min-width: 5.5em">Preis</th>
+                FID
+              </th>
+              <th class="border border-gray-300 px-2 py-0.5 text-left">Name</th>
+              <th class="border border-gray-300 px-2 py-0.5 text-left">
+                Aufwand
+              </th>
+              <th
+                class="border border-gray-300 px-2 py-0.5 min-w-[5.5em] text-left"
+              >
+                Preis
+              </th>
             </tr>
           </thead>
           <tbody>
             {{ range .Issues }}
             <tr>
-              <td style="font-family: monospace">{{ .Shorthand }}</td>
+              <td class="border border-gray-300 px-2 py-0.5 font-mono">
-              <td>{{ .Title }}</td>
+                {{ .Shorthand }}
-              <td>{{ .Duration | duration }}</td>
+              </td>
-              <td>{{ .Duration | price }} CHF</td>
+              <td class="border border-gray-300 px-2 py-0.5">{{ .Title }}</td>
+              <td class="border border-gray-300 px-2 py-0.5">
+                {{ .Duration | duration }}
+              </td>
+              <td class="border border-gray-300 px-2 py-0.5">
+                {{ .Duration | price }} CHF
+              </td>
             </tr>
             {{ end }}
           </tbody>
           <tfoot>
             <tr>
-              <th colspan="2" style="text-align: right">Summe:</th>
+              <th
-
+                colspan="2"
-              <td>{{ .Total | duration }}</td>
+                class="border border-gray-300 px-2 py-0.5 text-right"
-              <td>{{ .Total | price}}</td>
+              >
+                Summe:
+              </th>
+              <td class="border border-gray-300 px-2 py-0.5">
+                {{ .Total | duration }}
+              </td>
+              <td class="border border-gray-300 px-2 py-0.5">
+                {{ .Total | price }}
+              </td>
             </tr>
           </tfoot>
         </table>
       </article>
+
       {{ .Invoice.HTML }}
     </section>
-    <section>
-      <h2 style="margin-top: 0">Details zu den Features</h2>
 
+    <!-- Issue Details -->
+    <section>
+      <h2 class="font-semibold mb-4 text-2xl">Details zu den Features</h2>
       {{ range .Issues }}
-      <article>
+      <article class="mb-6">
-        <div class="issue-title">
+        <div class="flex justify-between items-end mb-2">
-          <h3>
+          <h3 class="font-semibold text-xl pt-5">
-            <a href="{{ .HTMLURL }}" style="font-family: monospace"
+            <a
+              href="{{ .HTMLURL }}"
+              class="font-mono text-blue-600 hover:underline"
               >{{ .Shorthand }}</a
             >: {{ .Title }}
           </h3>
-          <p>
+          <p class="text-sm text-gray-600">
-            {{ if .Closed }} Fertiggestellt: {{ .Closed | time }} {{else}} not
+            {{ if .Closed }} Fertiggestellt: {{ .Closed | time }} {{ else }} not
             closed {{ end }}
           </p>
         </div>
-        {{ .CleanBody | md | oh 3 }}
+        <div class="text-sm markdown">{{ .CleanBody | md | oh 3 }}</div>
       </article>
       {{ end }}
     </section>

pkg/invoice/report/qrbill/assets/style.css

@@ -1,111 +0,0 @@
-.c6ee15365-8f47-4dab-8bee-2a56a7916c57 {
-  position: absolute;
-  bottom: 0;
-  left: 0;
-  width: 100%;
-  display: grid;
-  grid-template-columns: 240px 1px 1fr;
-  grid-template-rows: 1px 1fr;
-
-  .separator-h {
-    grid-row: 1;
-    grid-column: 1 / span 3;
-
-    border-top: 1px solid black;
-    svg {
-      transform: rotate(-90deg);
-      margin-top: -52px;
-    }
-  }
-
-  .separator-v {
-    grid-row: 2;
-    grid-column: 2;
-
-    border-right: 1px solid black;
-    svg {
-      margin-left: -32px;
-    }
-  }
-
-  .receiver {
-    grid-row: 2;
-    grid-column: 1;
-
-    font-size: 12pt;
-    padding: 1em;
-
-    h2 {
-      margin: 0;
-      margin-bottom: 0.5em;
-    }
-    h4 {
-      margin-bottom: 0.1em;
-    }
-  }
-
-  .payer {
-    grid-row: 2;
-    grid-column: 3;
-    display: grid;
-    grid-template-columns: 250px 1fr;
-    grid-template-rows: 2em 1fr;
-    padding: 1em;
-    gap: 1em;
-
-    width: 100%;
-
-    h2 {
-      grid-row: 1;
-      grid-column: 1 / 2;
-      margin: 0;
-    }
-
-    h4 {
-      margin-bottom: 0.1em;
-    }
-
-    .qr-code {
-      grid-row: 2;
-      grid-column: 1;
-      display: flex;
-      flex-direction: column;
-      justify-content: space-between;
-
-      .qr-section-img {
-        position: relative;
-        width: 100%;
-        img {
-          width: 100%;
-        }
-        svg {
-          position: absolute;
-          top: 50%;
-          left: 50%;
-          transform: translate(-50%, -50%);
-          z-index: 1;
-          width: 40px;
-        }
-      }
-
-      .qr-section-info {
-        display: grid;
-        grid-template-columns: 1fr 1fr;
-        grid-template-rows: 1fr 1fr;
-        justify-items: center;
-
-        p,
-        h4 {
-          margin: 0;
-        }
-      }
-    }
-
-    .payment-details {
-      grid-row: 2;
-      grid-column: 2;
-      font-size: 0.9rem;
-      line-height: 1.4;
-    }
-  }
-}

pkg/invoice/report/qrbill/assets/template.html

@@ -1,70 +1,96 @@
-<article class="c6ee15365-8f47-4dab-8bee-2a56a7916c57">
+<article
-  <div class="separator-h">{{ .Scissors }}</div>
+  class="absolute bottom-0 left-0 w-full grid [grid-template-columns:240px_1px_1fr] [grid-template-rows:1px_1fr]"
-  <div class="receiver">
+>
-    <div class="payment-details">
+  <!-- Horizontal Separator -->
-      <div>
+  <div
-        <h2>Empfangsschein</h2>
+    class="separator-h row-start-1 col-span-3 border-t border-black relative"
-        <h4 style="margin-top: 0">Konto / Zahlbar an</h4>
+  >
-        <p>
+    <div class="absolute left-10 top-[-52px] rotate-[-90deg]">
-          {{ .ReceiverIBAN }} <br />
+      {{ .Scissors }}
-          {{ .ReceiverName }} <br />
-          {{ .ReceiverStreet}} {{.ReceiverNumber}} <br />
-          {{ .ReceiverZIPCode }} {{ .ReceiverPlace }}
-        </p>
     </div>
-      <div>
-        <h4>Referenz</h4>
-        <p>{{ .Reference }}</p>
-      </div>
-      <div>
-        <h4>Zahlbar durch</h4>
-        <p>
-          {{ .PayeeName }} <br />
-          {{ .PayeeStreet}} {{.PayeeNumber}} <br />
-          {{ .PayeeZIPCode }} {{ .PayeePlace }}
-        </p>
-      </div>
-    </div>
-  </div>
-  <div class="separator-v">{{ .Scissors }}</div>
-  <div class="payer">
-    <h2>Zahlteil</h2>
-    <div class="qr-code">
-      <!-- Replace with your QR code image or generated SVG -->
-      <div class="qr-section-img">
-        <image src="{{ .GetQR }}"></image>
-        {{ .Cross }}
   </div>
 
-      <div class="qr-section-info">
+  <!-- Receiver Section -->
-        <h4>Währung</h4>
+  <div class="receiver row-start-2 col-start-1 text-[12pt] p-4">
-        <h4>Betrag</h4>
+    <h2 class="m-0 mb-2 text-2xl font-bold">Empfangsschein</h2>
-        <p>CHF</p>
+    <div class="payment-details text-[0.9rem] leading-[1.4]">
-        <p>{{ .Amount }}</p>
+      <h4 class="mt-0 mb-[0.1em] font-bold">Konto / Zahlbar an</h4>
-      </div>
-    </div>
-    <div class="payment-details">
-      <div>
-        <h4 style="margin-top: 0">Konto / Zahlbar an</h4>
       <p>
         {{ .ReceiverIBAN }} <br />
         {{ .ReceiverName }} <br />
-          {{ .ReceiverStreet}} {{.ReceiverNumber}} <br />
+        {{ .ReceiverStreet }} {{ .ReceiverNumber }} <br />
         {{ .ReceiverZIPCode }} {{ .ReceiverPlace }}
       </p>
-      </div>
+
-      <div>
+      <h4 class="mt-2 mb-[0.1em] font-bold">Referenz</h4>
-        <h4>Referenz</h4>
       <p>{{ .Reference }}</p>
-      </div>
+
-      <div>
+      <h4 class="mt-2 mb-[0.1em] font-bold">Zahlbar durch</h4>
-        <h4>Zahlbar durch</h4>
       <p>
         {{ .PayeeName }} <br />
-          {{ .PayeeStreet}} {{.PayeeNumber}} <br />
+        {{ .PayeeStreet }} {{ .PayeeNumber }} <br />
         {{ .PayeeZIPCode }} {{ .PayeePlace }}
       </p>
     </div>
   </div>
+
+  <!-- Vertical Separator -->
+  <div
+    class="separator-v row-start-2 col-start-2 border-r border-black relative"
+  >
+    <div class="-ml-8">{{ .Scissors }}</div>
+  </div>
+
+  <!-- Payer Section -->
+  <div
+    class="payer row-start-2 col-start-3 grid [grid-template-columns:250px_1fr] [grid-template-rows:2em_1fr] p-4 gap-4 w-full"
+  >
+    <h2 class="row-start-1 col-span-1 m-0 text-2xl font-bold">Zahlteil</h2>
+
+    <!-- QR Code Section -->
+    <div class="qr-code row-start-2 col-start-1 flex flex-col justify-between">
+      <div class="qr-section-img relative w-full">
+        <img src="{{ .GetQR }}" class="w-full" />
+        <div
+          class="absolute top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 z-[1] scale-36"
+        >
+          <!-- cross gets replaced with svg-->
+          {{ .Cross }}
+        </div>
+      </div>
+
+      <div
+        class="qr-section-info grid grid-cols-2 grid-rows-2 justify-items-center"
+      >
+        <h4 class="m-0 font-bold">Währung</h4>
+        <h4 class="m-0 font-bold">Betrag</h4>
+        <p class="m-0">CHF</p>
+        <p class="m-0">{{ .Amount }}</p>
+      </div>
+    </div>
+
+    <!-- Payment Details -->
+    <div
+      class="payment-details row-start-2 col-start-2 text-[0.9rem] leading-[1.4]"
+    >
+      <h4 class="mt-0 mb-[0.1em] font-bold">Konto / Zahlbar an</h4>
+      <p>
+        {{ .ReceiverIBAN }} <br />
+        {{ .ReceiverName }} <br />
+        {{ .ReceiverStreet }} {{ .ReceiverNumber }} <br />
+        {{ .ReceiverZIPCode }} {{ .ReceiverPlace }}
+      </p>
+
+      <h4 class="mt-2 mb-[0.1em] font-bold">Referenz</h4>
+
+      <p>{{ .Reference }}</p>
+
+      <h4 class="mt-2 mb-[0.1em] font-bold">Zahlbar durch</h4>
+      <p>
+        {{ .PayeeName }} <br />
+        {{ .PayeeStreet }} {{ .PayeeNumber }} <br />
+        {{ .PayeeZIPCode }} {{ .PayeePlace }}
+      </p>
+    </div>
   </div>
 </article>

pkg/invoice/report/qrbill/html.go

@@ -16,19 +16,12 @@ var scissors template.HTML
 //go:embed assets/template.html
 var htmlTemplate string
 
-//go:embed assets/style.css
-var style template.CSS
-
 type tmpler struct {
 	Invoice
 	Cross    template.HTML
 	Scissors template.HTML
 }
 
-func (i Invoice) CSS() template.CSS {
-	return style
-}
-
 func (i Invoice) HTML() (html template.HTML, err error) {
 	tmpl := template.Must(template.New("invoice").Parse(htmlTemplate))
 

pkg/invoice/report/resource.go

@@ -3,11 +3,16 @@ package report
 import (
 	"time"
 
+	_ "embed"
+
 	"git.schreifuchs.ch/lou-taylor/accounting/pkg/invoice/issue"
 	"git.schreifuchs.ch/lou-taylor/accounting/pkg/invoice/model"
 	"git.schreifuchs.ch/lou-taylor/accounting/pkg/invoice/report/qrbill"
 )
 
+//go:embed assets/template.html
+var htmlTemplate string
+
 type Report struct {
 	Date     time.Time
 	Issues   []issue.Issue
@@ -15,17 +20,24 @@ type Report struct {
 	Rate     float64
 	Company  model.Entity
 	Client   *model.Entity
+	template string
 }
 
-func New(issues []issue.Issue, company model.Entity, client *model.Entity, rate float64) *Report {
+func New(issues []issue.Issue, company model.Entity, client *model.Entity, rate float64) Report {
-	r := &Report{
+	r := Report{
 		Date:     time.Now(),
 		Issues:   issues,
 		Rate:     rate,
 		Company:  company,
 		Client:   client,
+		template: htmlTemplate,
 	}
 	r.Invoice = qrbill.New(r.applyRate(r.Total()), r.Company, r.Client)
 
 	return r
 }
+
+func (r Report) WithTemplate(template string) Report {
+	r.template = template
+	return r
+}

pkg/invoice/report/template.go

@@ -9,14 +9,15 @@ import (
 	"time"
 )
 
-//go:embed assets/template.html
-var htmlTemplate string
-
 //go:embed assets/style.css
 var style template.CSS
 
+//go:embed assets/tailwind.js
+var tailwind template.JS
+
 type tmpler struct {
 	Report
+	Tailwind template.JS
 	Style    template.CSS
 }
 
@@ -29,11 +30,11 @@ func (r Report) ToHTML() (html string, err error) {
 			"time":     fmtDateTime,
 			"date":     fmtDate,
 			"duration": fmtDuration,
-		}).Parse(htmlTemplate))
+		}).Parse(r.template))
 
 	buf := new(bytes.Buffer)
 
-	err = tmpl.Execute(buf, tmpler{r, style})
+	err = tmpl.Execute(buf, tmpler{r, tailwind, style})
 	if err != nil {
 		return html, err
 	}

pkg/invoice/resource.go

@@ -16,6 +16,7 @@ var DefaultOptions = Options{
 	IssueFilter: func(i *gitea.Issue) bool {
 		return i.Closed != nil && i.Closed.After(time.Now().AddDate(0, -1, 0))
 	},
+	CustomTemplate: "",
 }
 
 type Options struct {
@@ -24,6 +25,7 @@ type Options struct {
 	Before         time.Time
 	IssueState     gitea.StateType
 	IssueFilter    func(i *gitea.Issue) bool
+	CustomTemplate string // if the length of the CustomTemplate is longer than 0, it get's used
 }
 
 type Repo struct {