Merge branch 'interactions'

app/entry_register.go

@@ -1,58 +1,11 @@
 package app
 
 import (
-	"errors"
 	"owl-blogs/domain/model"
-	"reflect"
 )
 
-type EntryTypeRegistry struct {
-	types map[string]model.Entry
-}
+type EntryTypeRegistry = TypeRegistry[model.Entry]
 
 func NewEntryTypeRegistry() *EntryTypeRegistry {
-	return &EntryTypeRegistry{types: map[string]model.Entry{}}
-}
-
-func (r *EntryTypeRegistry) entryType(entry model.Entry) string {
-	return reflect.TypeOf(entry).Elem().Name()
-}
-
-func (r *EntryTypeRegistry) Register(entry model.Entry) error {
-	t := r.entryType(entry)
-	if _, ok := r.types[t]; ok {
-		return errors.New("entry type already registered")
-	}
-	r.types[t] = entry
-	return nil
-}
-
-func (r *EntryTypeRegistry) Types() []model.Entry {
-	types := []model.Entry{}
-	for _, t := range r.types {
-		types = append(types, t)
-	}
-	return types
-}
-
-func (r *EntryTypeRegistry) TypeName(entry model.Entry) (string, error) {
-	t := r.entryType(entry)
-	if _, ok := r.types[t]; !ok {
-		return "", errors.New("entry type not registered")
-	}
-	return t, nil
-}
-
-func (r *EntryTypeRegistry) Type(name string) (model.Entry, error) {
-	if _, ok := r.types[name]; !ok {
-		return nil, errors.New("entry type not registered")
-	}
-
-	val := reflect.ValueOf(r.types[name])
-	if val.Kind() == reflect.Ptr {
-		val = reflect.Indirect(val)
-	}
-	newEntry := reflect.New(val.Type()).Interface().(model.Entry)
-
-	return newEntry, nil
+	return NewTypeRegistry[model.Entry]()
 }

app/generic_register.go

@@ -0,0 +1,57 @@
+package app
+
+import (
+	"errors"
+	"reflect"
+)
+
+type TypeRegistry[T any] struct {
+	types map[string]T
+}
+
+func NewTypeRegistry[T any]() *TypeRegistry[T] {
+	return &TypeRegistry[T]{types: map[string]T{}}
+}
+
+func (r *TypeRegistry[T]) entryType(entry T) string {
+	return reflect.TypeOf(entry).Elem().Name()
+}
+
+func (r *TypeRegistry[T]) Register(entry T) error {
+	t := r.entryType(entry)
+	if _, ok := r.types[t]; ok {
+		return errors.New("entry type already registered")
+	}
+	r.types[t] = entry
+	return nil
+}
+
+func (r *TypeRegistry[T]) Types() []T {
+	types := []T{}
+	for _, t := range r.types {
+		types = append(types, t)
+	}
+	return types
+}
+
+func (r *TypeRegistry[T]) TypeName(entry T) (string, error) {
+	t := r.entryType(entry)
+	if _, ok := r.types[t]; !ok {
+		return "", errors.New("entry type not registered")
+	}
+	return t, nil
+}
+
+func (r *TypeRegistry[T]) Type(name string) (T, error) {
+	if _, ok := r.types[name]; !ok {
+		return *new(T), errors.New("entry type not registered")
+	}
+
+	val := reflect.ValueOf(r.types[name])
+	if val.Kind() == reflect.Ptr {
+		val = reflect.Indirect(val)
+	}
+	newEntry := reflect.New(val.Type()).Interface().(T)
+
+	return newEntry, nil
+}

app/interaction_register.go

@@ -0,0 +1,11 @@
+package app
+
+import (
+	"owl-blogs/domain/model"
+)
+
+type InteractionTypeRegistry = TypeRegistry[model.Interaction]
+
+func NewInteractionTypeRegistry() *InteractionTypeRegistry {
+	return NewTypeRegistry[model.Interaction]()
+}

app/owlhttp/interface.go

@@ -0,0 +1,13 @@
+package owlhttp
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+)
+
+type HttpClient interface {
+	Get(url string) (resp *http.Response, err error)
+	Post(url, contentType string, body io.Reader) (resp *http.Response, err error)
+	PostForm(url string, data url.Values) (resp *http.Response, err error)
+}

app/repository/interfaces.go

@@ -36,3 +36,11 @@ type ConfigRepository interface {
 	Get(name string, config interface{}) error
 	Update(name string, siteConfig interface{}) error
 }
+
+type InteractionRepository interface {
+	Create(interaction model.Interaction) error
+	Update(interaction model.Interaction) error
+	Delete(interaction model.Interaction) error
+	FindById(id string) (model.Interaction, error)
+	FindAll(entryId string) ([]model.Interaction, error)
+}

app/utils.go

@@ -2,6 +2,7 @@ package app
 
 import (
 	"math/rand"
+	"strings"
 )
 
 var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
@@ -13,3 +14,12 @@ func RandStringRunes(n int) string {
 	}
 	return string(b)
 }
+
+func UrlToEntryId(url string) string {
+	parts := strings.Split(url, "/")
+	if parts[len(parts)-1] == "" {
+		return parts[len(parts)-2]
+	} else {
+		return parts[len(parts)-1]
+	}
+}

app/webmention_service.go

@@ -0,0 +1,166 @@
+package app
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"net/http"
+	"owl-blogs/app/owlhttp"
+	"owl-blogs/app/repository"
+	"owl-blogs/interactions"
+	"strings"
+	"time"
+
+	"golang.org/x/net/html"
+)
+
+type WebmentionService struct {
+	InteractionRepository repository.InteractionRepository
+	EntryRepository       repository.EntryRepository
+	Http                  owlhttp.HttpClient
+}
+
+type ParsedHEntry struct {
+	Title string
+}
+
+func NewWebmentionService(
+	interactionRepository repository.InteractionRepository,
+	entryRepository repository.EntryRepository,
+	http owlhttp.HttpClient,
+) *WebmentionService {
+	return &WebmentionService{
+		InteractionRepository: interactionRepository,
+		EntryRepository:       entryRepository,
+		Http:                  http,
+	}
+}
+
+func readResponseBody(resp *http.Response) (string, error) {
+	defer resp.Body.Close()
+	bodyBytes, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+	return string(bodyBytes), nil
+}
+
+func collectText(n *html.Node, buf *bytes.Buffer) {
+
+	if n.Type == html.TextNode {
+		buf.WriteString(n.Data)
+	}
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		collectText(c, buf)
+	}
+}
+
+func (WebmentionService) ParseHEntry(resp *http.Response) (ParsedHEntry, error) {
+	htmlStr, err := readResponseBody(resp)
+	if err != nil {
+		return ParsedHEntry{}, err
+	}
+	doc, err := html.Parse(strings.NewReader(htmlStr))
+	if err != nil {
+		return ParsedHEntry{}, err
+	}
+
+	var interpretHFeed func(*html.Node, *ParsedHEntry, bool) (ParsedHEntry, error)
+	interpretHFeed = func(n *html.Node, curr *ParsedHEntry, parent bool) (ParsedHEntry, error) {
+		attrs := n.Attr
+		for _, attr := range attrs {
+			if attr.Key == "class" && strings.Contains(attr.Val, "p-name") {
+				buf := &bytes.Buffer{}
+				collectText(n, buf)
+				curr.Title = buf.String()
+				return *curr, nil
+			}
+		}
+
+		for c := n.FirstChild; c != nil; c = c.NextSibling {
+			interpretHFeed(c, curr, false)
+		}
+		return *curr, nil
+	}
+
+	var findHFeed func(*html.Node) (ParsedHEntry, error)
+	findHFeed = func(n *html.Node) (ParsedHEntry, error) {
+		attrs := n.Attr
+		for _, attr := range attrs {
+			if attr.Key == "class" && strings.Contains(attr.Val, "h-entry") {
+				return interpretHFeed(n, &ParsedHEntry{}, true)
+			}
+		}
+		for c := n.FirstChild; c != nil; c = c.NextSibling {
+			entry, err := findHFeed(c)
+			if err == nil {
+				return entry, nil
+			}
+		}
+		return ParsedHEntry{}, errors.New("no h-entry found")
+	}
+	return findHFeed(doc)
+}
+
+func (s *WebmentionService) GetExistingWebmention(entryId string, source string, target string) (*interactions.Webmention, error) {
+	inters, err := s.InteractionRepository.FindAll(entryId)
+	if err != nil {
+		return nil, err
+	}
+	for _, interaction := range inters {
+		if webm, ok := interaction.(*interactions.Webmention); ok {
+			m := webm.MetaData().(*interactions.WebmentionMetaData)
+			if m.Source == source && m.Target == target {
+				return webm, nil
+			}
+		}
+	}
+	return nil, nil
+}
+
+func (s *WebmentionService) ProcessWebmention(source string, target string) error {
+	resp, err := s.Http.Get(source)
+	if err != nil {
+		return err
+	}
+
+	hEntry, err := s.ParseHEntry(resp)
+	if err != nil {
+		return err
+	}
+
+	entryId := UrlToEntryId(target)
+	_, err = s.EntryRepository.FindById(entryId)
+	if err != nil {
+		return err
+	}
+
+	webmention, err := s.GetExistingWebmention(entryId, source, target)
+	if err != nil {
+		return err
+	}
+	if webmention != nil {
+		data := interactions.WebmentionMetaData{
+			Source: source,
+			Target: target,
+			Title:  hEntry.Title,
+		}
+		webmention.SetMetaData(&data)
+		webmention.SetEntryID(entryId)
+		webmention.SetCreatedAt(time.Now())
+		err = s.InteractionRepository.Update(webmention)
+		return err
+	} else {
+		webmention = &interactions.Webmention{}
+		data := interactions.WebmentionMetaData{
+			Source: source,
+			Target: target,
+			Title:  hEntry.Title,
+		}
+		webmention.SetMetaData(&data)
+		webmention.SetEntryID(entryId)
+		webmention.SetCreatedAt(time.Now())
+		err = s.InteractionRepository.Create(webmention)
+		return err
+	}
+}

app/webmention_test.go

@@ -0,0 +1,222 @@
+package app_test
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"owl-blogs/app"
+	"owl-blogs/infra"
+	"owl-blogs/interactions"
+	"owl-blogs/test"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// func constructResponse(html []byte) *http.Response {
+// 	url, _ := url.Parse("http://example.com/foo/bar")
+// 	return &http.Response{
+// 		Request: &http.Request{
+// 			URL: url,
+// 		},
+// 		Body: io.NopCloser(bytes.NewReader([]byte(html))),
+// 	}
+// }
+
+type MockHttpClient struct {
+	PageContent string
+}
+
+// Post implements owlhttp.HttpClient.
+func (MockHttpClient) Post(url string, contentType string, body io.Reader) (resp *http.Response, err error) {
+	panic("unimplemented")
+}
+
+// PostForm implements owlhttp.HttpClient.
+func (MockHttpClient) PostForm(url string, data url.Values) (resp *http.Response, err error) {
+	panic("unimplemented")
+}
+
+func (c *MockHttpClient) Get(url string) (*http.Response, error) {
+	return &http.Response{
+		Body: io.NopCloser(bytes.NewReader([]byte(c.PageContent))),
+	}, nil
+}
+
+func getWebmentionService() *app.WebmentionService {
+	db := test.NewMockDb()
+	entryRegister := app.NewEntryTypeRegistry()
+	entryRegister.Register(&test.MockEntry{})
+	entryRepo := infra.NewEntryRepository(db, entryRegister)
+
+	interactionRegister := app.NewInteractionTypeRegistry()
+	interactionRegister.Register(&interactions.Webmention{})
+
+	interactionRepo := infra.NewInteractionRepo(db, interactionRegister)
+
+	http := infra.OwlHttpClient{}
+	return app.NewWebmentionService(
+		interactionRepo, entryRepo, &http,
+	)
+}
+
+//
+// https://www.w3.org/TR/webmention/#h-webmention-verification
+//
+
+func TestParseValidHEntry(t *testing.T) {
+	service := getWebmentionService()
+	html := []byte("<div class=\"h-entry\"><div class=\"p-name\">Foo</div></div>")
+	entry, err := service.ParseHEntry(&http.Response{Body: io.NopCloser(bytes.NewReader(html))})
+
+	require.NoError(t, err)
+	require.Equal(t, entry.Title, "Foo")
+}
+
+func TestParseValidHEntryWithoutTitle(t *testing.T) {
+	service := getWebmentionService()
+	html := []byte("<div class=\"h-entry\"></div><div class=\"p-name\">Foo</div>")
+	entry, err := service.ParseHEntry(&http.Response{Body: io.NopCloser(bytes.NewReader(html))})
+
+	require.NoError(t, err)
+	require.Equal(t, entry.Title, "")
+}
+
+func TestCreateNewWebmention(t *testing.T) {
+	service := getWebmentionService()
+	service.Http = &MockHttpClient{
+		PageContent: "<div class=\"h-entry\"><div class=\"p-name\">Foo</div></div>",
+	}
+	entry := test.MockEntry{}
+	service.EntryRepository.Create(&entry)
+
+	err := service.ProcessWebmention(
+		"http://example.com/foo",
+		fmt.Sprintf("https.//example.com/posts/%s/", entry.ID()),
+	)
+	require.NoError(t, err)
+
+	inters, err := service.InteractionRepository.FindAll(entry.ID())
+	require.NoError(t, err)
+	require.Equal(t, len(inters), 1)
+	webm := inters[0].(*interactions.Webmention)
+	meta := webm.MetaData().(*interactions.WebmentionMetaData)
+	require.Equal(t, meta.Source, "http://example.com/foo")
+	require.Equal(t, meta.Target, fmt.Sprintf("https.//example.com/posts/%s/", entry.ID()))
+	require.Equal(t, meta.Title, "Foo")
+}
+
+// func TestGetWebmentionEndpointLink(t *testing.T) {
+// 	service := getWebmentionService()
+// 	html := []byte("<link rel=\"webmention\" href=\"http://example.com/webmention\" />")
+// 	endpoint, err := service.GetWebmentionEndpoint(constructResponse(html))
+
+// 	require.NoError(t, err)
+
+// 	require.Equal(t, endpoint, "http://example.com/webmention")
+// }
+
+// func TestGetWebmentionEndpointLinkA(t *testing.T) {
+// 	service := getWebmentionService()
+// 	html := []byte("<a rel=\"webmention\" href=\"http://example.com/webmention\" />")
+// 	endpoint, err := service.GetWebmentionEndpoint(constructResponse(html))
+
+// 	require.NoError(t, err)
+// 	require.Equal(t, endpoint, "http://example.com/webmention")
+// }
+
+// func TestGetWebmentionEndpointLinkAFakeWebmention(t *testing.T) {
+// 	service := getWebmentionService()
+// 	html := []byte("<a rel=\"not-webmention\" href=\"http://example.com/foo\" /><a rel=\"webmention\" href=\"http://example.com/webmention\" />")
+// 	endpoint, err := service.GetWebmentionEndpoint(constructResponse(html))
+
+// 	require.NoError(t, err)
+// 	require.Equal(t, endpoint, "http://example.com/webmention")
+// }
+
+// func TestGetWebmentionEndpointLinkHeader(t *testing.T) {
+// 	service := getWebmentionService()
+// 	html := []byte("")
+// 	resp := constructResponse(html)
+// 	resp.Header = http.Header{"Link": []string{"<http://example.com/webmention>; rel=\"webmention\""}}
+// 	endpoint, err := service.GetWebmentionEndpoint(resp)
+
+// 	require.NoError(t, err)
+// 	require.Equal(t, endpoint, "http://example.com/webmention")
+// }
+
+// func TestGetWebmentionEndpointLinkHeaderCommas(t *testing.T) {
+// 	service := getWebmentionService()
+// 	html := []byte("")
+// 	resp := constructResponse(html)
+// 	resp.Header = http.Header{
+// 		"Link": []string{"<https://webmention.rocks/test/19/webmention/error>; rel=\"other\", <https://webmention.rocks/test/19/webmention>; rel=\"webmention\""},
+// 	}
+// 	endpoint, err := service.GetWebmentionEndpoint(resp)
+
+// 	require.NoError(t, err)
+// 	require.Equal(t, endpoint, "https://webmention.rocks/test/19/webmention")
+// }
+
+// func TestGetWebmentionEndpointRelativeLink(t *testing.T) {
+// 	service := getWebmentionService()
+// 	html := []byte("<link rel=\"webmention\" href=\"/webmention\" />")
+// 	endpoint, err := service.GetWebmentionEndpoint(constructResponse(html))
+
+// 	require.NoError(t, err)
+// 	require.Equal(t, endpoint, "http://example.com/webmention")
+// }
+
+// func TestGetWebmentionEndpointRelativeLinkInHeader(t *testing.T) {
+// 	service := getWebmentionService()
+// 	html := []byte("<link rel=\"webmention\" href=\"/webmention\" />")
+// 	resp := constructResponse(html)
+// 	resp.Header = http.Header{"Link": []string{"</webmention>; rel=\"webmention\""}}
+// 	endpoint, err := service.GetWebmentionEndpoint(resp)
+
+// 	require.NoError(t, err)
+// 	require.Equal(t, endpoint, "http://example.com/webmention")
+// }
+
+// func TestRealWorldWebmention(t *testing.T) {
+//  service := getWebmentionService()
+// 	links := []string{
+// 		"https://webmention.rocks/test/1",
+// 		"https://webmention.rocks/test/2",
+// 		"https://webmention.rocks/test/3",
+// 		"https://webmention.rocks/test/4",
+// 		"https://webmention.rocks/test/5",
+// 		"https://webmention.rocks/test/6",
+// 		"https://webmention.rocks/test/7",
+// 		"https://webmention.rocks/test/8",
+// 		"https://webmention.rocks/test/9",
+// 		// "https://webmention.rocks/test/10", // not supported
+// 		"https://webmention.rocks/test/11",
+// 		"https://webmention.rocks/test/12",
+// 		"https://webmention.rocks/test/13",
+// 		"https://webmention.rocks/test/14",
+// 		"https://webmention.rocks/test/15",
+// 		"https://webmention.rocks/test/16",
+// 		"https://webmention.rocks/test/17",
+// 		"https://webmention.rocks/test/18",
+// 		"https://webmention.rocks/test/19",
+// 		"https://webmention.rocks/test/20",
+// 		"https://webmention.rocks/test/21",
+// 		"https://webmention.rocks/test/22",
+// 		"https://webmention.rocks/test/23/page",
+// 	}
+
+// 	for _, link := range links {
+//
+// 		client := &owl.OwlHttpClient{}
+// 		html, _ := client.Get(link)
+// 		_, err := service.GetWebmentionEndpoint(html)
+
+// 		if err != nil {
+// 			t.Errorf("Unable to find webmention: %v for link %v", err, link)
+// 		}
+// 	}
+
+// }

cmd/owl/main.go

@@ -6,6 +6,7 @@ import (
 	"owl-blogs/app"
 	entrytypes "owl-blogs/entry_types"
 	"owl-blogs/infra"
+	"owl-blogs/interactions"
 	"owl-blogs/web"
 
 	"github.com/spf13/cobra"
@@ -26,29 +27,44 @@ func Execute() {
 }
 
 func App(db infra.Database) *web.WebApp {
-	registry := app.NewEntryTypeRegistry()
-	registry.Register(&entrytypes.Image{})
-	registry.Register(&entrytypes.Article{})
-	registry.Register(&entrytypes.Page{})
-	registry.Register(&entrytypes.Recipe{})
-	registry.Register(&entrytypes.Note{})
-	registry.Register(&entrytypes.Bookmark{})
-	registry.Register(&entrytypes.Reply{})
+	// Register Types
+	entryRegister := app.NewEntryTypeRegistry()
+	entryRegister.Register(&entrytypes.Image{})
+	entryRegister.Register(&entrytypes.Article{})
+	entryRegister.Register(&entrytypes.Page{})
+	entryRegister.Register(&entrytypes.Recipe{})
+	entryRegister.Register(&entrytypes.Note{})
+	entryRegister.Register(&entrytypes.Bookmark{})
+	entryRegister.Register(&entrytypes.Reply{})
 
-	entryRepo := infra.NewEntryRepository(db, registry)
-	binRepo := infra.NewBinaryFileRepo(db)
-	authorRepo := infra.NewDefaultAuthorRepo(db)
-	siteConfigRepo := infra.NewConfigRepo(db)
-
-	entryService := app.NewEntryService(entryRepo)
-	binaryService := app.NewBinaryFileService(binRepo)
-	authorService := app.NewAuthorService(authorRepo, siteConfigRepo)
+	interactionRegister := app.NewInteractionTypeRegistry()
+	interactionRegister.Register(&interactions.Webmention{})
 
 	configRegister := app.NewConfigRegister()
 
+	// Create Repositories
+	entryRepo := infra.NewEntryRepository(db, entryRegister)
+	binRepo := infra.NewBinaryFileRepo(db)
+	authorRepo := infra.NewDefaultAuthorRepo(db)
+	siteConfigRepo := infra.NewConfigRepo(db)
+	interactionRepo := infra.NewInteractionRepo(db, interactionRegister)
+
+	// Create External Services
+	httpClient := &infra.OwlHttpClient{}
+
+	// Create Services
+	entryService := app.NewEntryService(entryRepo)
+	binaryService := app.NewBinaryFileService(binRepo)
+	authorService := app.NewAuthorService(authorRepo, siteConfigRepo)
+	webmentionService := app.NewWebmentionService(
+		interactionRepo, entryRepo, httpClient,
+	)
+
+	// Create WebApp
 	return web.NewWebApp(
-		entryService, registry, binaryService,
+		entryService, entryRegister, binaryService,
 		authorService, siteConfigRepo, configRegister,
+		webmentionService, interactionRepo,
 	)
 
 }

domain/model/interaction.go

@@ -0,0 +1,53 @@
+package model
+
+import "time"
+
+type InteractionContent string
+
+// Interaction is a generic interface for all interactions with entries
+// These interactions can be:
+// - Webmention, Pingback, Trackback
+// - Likes, Comments on third party sites
+// - Comments on the site itself
+type Interaction interface {
+	ID() string
+	EntryID() string
+	Content() InteractionContent
+	CreatedAt() time.Time
+	MetaData() interface{}
+
+	SetID(id string)
+	SetEntryID(entryID string)
+	SetCreatedAt(createdAt time.Time)
+	SetMetaData(metaData interface{})
+}
+
+type InteractionBase struct {
+	id        string
+	entryID   string
+	createdAt time.Time
+}
+
+func (i *InteractionBase) ID() string {
+	return i.id
+}
+
+func (i *InteractionBase) EntryID() string {
+	return i.entryID
+}
+
+func (i *InteractionBase) CreatedAt() time.Time {
+	return i.createdAt
+}
+
+func (i *InteractionBase) SetID(id string) {
+	i.id = id
+}
+
+func (i *InteractionBase) SetEntryID(entryID string) {
+	i.entryID = entryID
+}
+
+func (i *InteractionBase) SetCreatedAt(createdAt time.Time) {
+	i.createdAt = createdAt
+}

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/spf13/cobra v1.7.0
 	github.com/stretchr/testify v1.8.4
 	github.com/yuin/goldmark v1.5.4
-	golang.org/x/crypto v0.11.0
+	golang.org/x/crypto v0.12.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
@@ -37,6 +37,7 @@ require (
 	github.com/valyala/fasthttp v1.47.0 // indirect
 	github.com/valyala/fastjson v1.6.4 // indirect
 	github.com/valyala/tcplisten v1.0.0 // indirect
-	golang.org/x/sys v0.10.0 // indirect
+	golang.org/x/net v0.14.0 // indirect
+	golang.org/x/sys v0.11.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -76,6 +76,8 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
 golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=
+golang.org/x/crypto v0.12.0 h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=
+golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.7.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
@@ -85,6 +87,8 @@ golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
 golang.org/x/net v0.3.0/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
+golang.org/x/net v0.14.0 h1:BONx9s002vGdD9umnlX1Po8vOZmrgH34qlHcD1MfK14=
+golang.org/x/net v0.14.0/go.mod h1:PpSgVXXLK0OxS0F31C1/tv6XNguvCrnXIDrFMspZIUI=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -101,6 +105,8 @@ golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
+golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.3.0/go.mod h1:q750SLmJuPmVoN1blW3UFBPREJfb1KmY3vwxfr+nFDA=

infra/entry_repository.go

@@ -28,6 +28,26 @@ type DefaultEntryRepo struct {
 	db           *sqlx.DB
 }
 
+func NewEntryRepository(db Database, register *app.EntryTypeRegistry) repository.EntryRepository {
+	sqlxdb := db.Get()
+
+	// Create tables if not exists
+	sqlxdb.MustExec(`
+		CREATE TABLE IF NOT EXISTS entries (
+			id TEXT PRIMARY KEY,
+			type TEXT NOT NULL,
+			published_at DATETIME,
+			author_id TEXT NOT NULL,
+			meta_data TEXT NOT NULL
+		);
+	`)
+
+	return &DefaultEntryRepo{
+		db:           sqlxdb,
+		typeRegistry: register,
+	}
+}
+
 // Create implements repository.EntryRepository.
 func (r *DefaultEntryRepo) Create(entry model.Entry) error {
 	t, err := r.typeRegistry.TypeName(entry)
@@ -50,6 +70,9 @@ func (r *DefaultEntryRepo) Create(entry model.Entry) error {
 
 // Delete implements repository.EntryRepository.
 func (r *DefaultEntryRepo) Delete(entry model.Entry) error {
+	if entry.ID() == "" {
+		return errors.New("entry not found")
+	}
 	_, err := r.db.Exec("DELETE FROM entries WHERE id = ?", entry.ID())
 	return err
 }
@@ -123,26 +146,6 @@ func (r *DefaultEntryRepo) Update(entry model.Entry) error {
 	return err
 }
 
-func NewEntryRepository(db Database, register *app.EntryTypeRegistry) repository.EntryRepository {
-	sqlxdb := db.Get()
-
-	// Create tables if not exists
-	sqlxdb.MustExec(`
-		CREATE TABLE IF NOT EXISTS entries (
-			id TEXT PRIMARY KEY,
-			type TEXT NOT NULL,
-			published_at DATETIME,
-			author_id TEXT NOT NULL,
-			meta_data TEXT NOT NULL
-		);
-	`)
-
-	return &DefaultEntryRepo{
-		db:           sqlxdb,
-		typeRegistry: register,
-	}
-}
-
 func (r *DefaultEntryRepo) sqlEntryToEntry(entry sqlEntry) (model.Entry, error) {
 	e, err := r.typeRegistry.Type(entry.Type)
 	if err != nil {

infra/http.go

@@ -0,0 +1,5 @@
+package infra
+
+import "net/http"
+
+type OwlHttpClient = http.Client

infra/interaction_repository.go

@@ -0,0 +1,158 @@
+package infra
+
+import (
+	"encoding/json"
+	"errors"
+	"owl-blogs/app"
+	"owl-blogs/app/repository"
+	"owl-blogs/domain/model"
+	"reflect"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/jmoiron/sqlx"
+)
+
+type sqlInteraction struct {
+	Id        string    `db:"id"`
+	Type      string    `db:"type"`
+	EntryId   string    `db:"entry_id"`
+	CreatedAt time.Time `db:"created_at"`
+	MetaData  *string   `db:"meta_data"`
+}
+
+type DefaultInteractionRepo struct {
+	typeRegistry *app.InteractionTypeRegistry
+	db           *sqlx.DB
+}
+
+func NewInteractionRepo(db Database, register *app.InteractionTypeRegistry) repository.InteractionRepository {
+	sqlxdb := db.Get()
+
+	// Create tables if not exists
+	sqlxdb.MustExec(`
+		CREATE TABLE IF NOT EXISTS interactions (
+			id TEXT PRIMARY KEY,
+			type TEXT NOT NULL,
+			entry_id TEXT NOT NULL,
+			created_at DATETIME NOT NULL,
+			meta_data TEXT NOT NULL
+		);
+	`)
+
+	return &DefaultInteractionRepo{
+		db:           sqlxdb,
+		typeRegistry: register,
+	}
+}
+
+// Create implements repository.InteractionRepository.
+func (repo *DefaultInteractionRepo) Create(interaction model.Interaction) error {
+	t, err := repo.typeRegistry.TypeName(interaction)
+	if err != nil {
+		return errors.New("interaction type not registered")
+	}
+
+	if interaction.ID() == "" {
+		interaction.SetID(uuid.New().String())
+	}
+
+	var metaDataJson []byte
+	if interaction.MetaData() != nil {
+		metaDataJson, _ = json.Marshal(interaction.MetaData())
+	}
+	metaDataStr := string(metaDataJson)
+
+	_, err = repo.db.NamedExec(`
+		INSERT INTO interactions (id, type, entry_id, created_at, meta_data)
+		VALUES (:id, :type, :entry_id, :created_at, :meta_data)
+	`, sqlInteraction{
+		Id:        interaction.ID(),
+		Type:      t,
+		EntryId:   interaction.EntryID(),
+		CreatedAt: interaction.CreatedAt(),
+		MetaData:  &metaDataStr,
+	})
+
+	return err
+}
+
+// Delete implements repository.InteractionRepository.
+func (repo *DefaultInteractionRepo) Delete(interaction model.Interaction) error {
+	if interaction.ID() == "" {
+		return errors.New("interaction not found")
+	}
+	_, err := repo.db.Exec("DELETE FROM interactions WHERE id = ?", interaction.ID())
+	return err
+}
+
+// FindAll implements repository.InteractionRepository.
+func (repo *DefaultInteractionRepo) FindAll(entryId string) ([]model.Interaction, error) {
+	data := []sqlInteraction{}
+	err := repo.db.Select(&data, "SELECT * FROM interactions WHERE entry_id = ?", entryId)
+	if err != nil {
+		return nil, err
+	}
+
+	interactions := []model.Interaction{}
+	for _, d := range data {
+		i, err := repo.sqlInteractionToInteraction(d)
+		if err != nil {
+			return nil, err
+		}
+		interactions = append(interactions, i)
+	}
+
+	return interactions, nil
+}
+
+// FindById implements repository.InteractionRepository.
+func (repo *DefaultInteractionRepo) FindById(id string) (model.Interaction, error) {
+	data := sqlInteraction{}
+	err := repo.db.Get(&data, "SELECT * FROM interactions WHERE id = ?", id)
+	if err != nil {
+		return nil, err
+	}
+	if data.Id == "" {
+		return nil, errors.New("interaction not found")
+	}
+	return repo.sqlInteractionToInteraction(data)
+}
+
+// Update implements repository.InteractionRepository.
+func (repo *DefaultInteractionRepo) Update(interaction model.Interaction) error {
+	exInter, _ := repo.FindById(interaction.ID())
+	if exInter == nil {
+		return errors.New("interaction not found")
+	}
+
+	_, err := repo.typeRegistry.TypeName(interaction)
+	if err != nil {
+		return errors.New("interaction type not registered")
+	}
+
+	var metaDataJson []byte
+	if interaction.MetaData() != nil {
+		metaDataJson, _ = json.Marshal(interaction.MetaData())
+	}
+
+	_, err = repo.db.Exec("UPDATE interactions SET entry_id = ?, meta_data = ? WHERE id = ?", interaction.EntryID(), metaDataJson, interaction.ID())
+
+	return err
+}
+
+func (repo *DefaultInteractionRepo) sqlInteractionToInteraction(interaction sqlInteraction) (model.Interaction, error) {
+	i, err := repo.typeRegistry.Type(interaction.Type)
+	if err != nil {
+		return nil, errors.New("interaction type not registered")
+	}
+	metaData := reflect.New(reflect.TypeOf(i.MetaData()).Elem()).Interface()
+	json.Unmarshal([]byte(*interaction.MetaData), metaData)
+	i.SetID(interaction.Id)
+	i.SetEntryID(interaction.EntryId)
+	i.SetCreatedAt(interaction.CreatedAt)
+	i.SetMetaData(metaData)
+
+	return i, nil
+
+}

interactions/webmention.go

@@ -0,0 +1,34 @@
+package interactions
+
+import (
+	"fmt"
+	"owl-blogs/domain/model"
+	"owl-blogs/render"
+)
+
+type Webmention struct {
+	model.InteractionBase
+	meta WebmentionMetaData
+}
+
+type WebmentionMetaData struct {
+	Source string
+	Target string
+	Title  string
+}
+
+func (i *Webmention) Content() model.InteractionContent {
+	str, err := render.RenderTemplateToString("interaction/Webmention", i)
+	if err != nil {
+		fmt.Println(err)
+	}
+	return model.InteractionContent(str)
+}
+
+func (i *Webmention) MetaData() interface{} {
+	return &i.meta
+}
+
+func (i *Webmention) SetMetaData(metaData interface{}) {
+	i.meta = *metaData.(*WebmentionMetaData)
+}

render/templates/base.tmpl

@@ -6,6 +6,7 @@
         <meta http-equiv="X-UA-Compatible" content="IE=edge">
         <title>{{template "title" .Data}} - {{ .SiteConfig.Title }}</title>
         <meta property="og:title" content="{{template "title" .Data}}" />
+        <link rel="webmention" href="/webmention/" />
         
         <link rel='stylesheet' href='/static/pico.min.css'>
         <style>

render/templates/interaction/Webmention.tmpl

@@ -0,0 +1,7 @@
+<a href="{{.MetaData.Source}}">
+    {{if .MetaData.Title}}
+        {{.MetaData.Title}}
+    {{else}}
+        {{.MetaData.Source}}
+    {{end}}
+</a>

render/templates/views/entry.tmpl

@@ -39,6 +39,34 @@
 
 </div>
 
+{{if .Interactions}}
+<br>
+<br>
+<br>
+<hr>
+<h4>
+    Interactions
+</h4>
+<ul>
+    {{range .Interactions}}
+    <li>
+        {{ .Content }}
+        {{ if $.LoggedIn }}
+            <form method="post" action="/admin/interactions/{{.ID}}/delete/" class="grid">
+                <label for="confirm">
+                    Confirm deletion
+                    <input type="checkbox" name="confirm" id="confirm" required />
+                </label>
+                <input type="submit" class="secondary outline" value="Delete" />
+            </form>
+        {{ end }}
+    </li>
+    {{end}}
+</ul>
+{{end}}
+
+
+
 {{ if .LoggedIn }}
 <br>
 <br>

web/admin_interaction_handler.go

@@ -0,0 +1,41 @@
+package web
+
+import (
+	"owl-blogs/app/repository"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+type AdminInteractionHandler struct {
+	interactionRepo repository.InteractionRepository
+	configRepo      repository.ConfigRepository
+}
+
+func NewAdminInteractionHandler(configRepo repository.ConfigRepository, interactionRepo repository.InteractionRepository) *AdminInteractionHandler {
+	return &AdminInteractionHandler{
+		interactionRepo: interactionRepo,
+		configRepo:      configRepo,
+	}
+}
+
+func (h *AdminInteractionHandler) HandleDelete(c *fiber.Ctx) error {
+	c.Set(fiber.HeaderContentType, fiber.MIMETextHTML)
+
+	id := c.Params("id")
+	inter, err := h.interactionRepo.FindById(id)
+	entryId := inter.EntryID()
+	if err != nil {
+		return err
+	}
+
+	confirm := c.FormValue("confirm")
+	if confirm != "on" {
+		return c.Redirect("/posts/" + inter.ID() + "/")
+	}
+
+	err = h.interactionRepo.Delete(inter)
+	if err != nil {
+		return err
+	}
+	return c.Redirect("/posts/" + entryId + "/")
+}

web/app.go

@@ -34,17 +34,20 @@ func NewWebApp(
 	authorService *app.AuthorService,
 	configRepo repository.ConfigRepository,
 	configRegister *app.ConfigRegister,
+	webmentionService *app.WebmentionService,
+	interactionRepo repository.InteractionRepository,
 ) *WebApp {
 	app := fiber.New()
 	app.Use(middleware.NewUserMiddleware(authorService).Handle)
 
 	indexHandler := NewIndexHandler(entryService, configRepo)
 	listHandler := NewListHandler(entryService, configRepo)
-	entryHandler := NewEntryHandler(entryService, typeRegistry, authorService, configRepo)
+	entryHandler := NewEntryHandler(entryService, typeRegistry, authorService, configRepo, interactionRepo)
 	mediaHandler := NewMediaHandler(binService)
 	rssHandler := NewRSSHandler(entryService, configRepo)
 	loginHandler := NewLoginHandler(authorService, configRepo)
 	editorHandler := NewEditorHandler(entryService, typeRegistry, binService, configRepo)
+	webmentionHandler := NewWebmentionHandler(webmentionService, configRepo)
 
 	// Login
 	app.Get("/auth/login", loginHandler.HandleGet)
@@ -54,6 +57,7 @@ func NewWebApp(
 	adminHandler := NewAdminHandler(configRepo, configRegister, typeRegistry)
 	draftHandler := NewDraftHandler(entryService, configRepo)
 	binaryManageHandler := NewBinaryManageHandler(configRepo, binService)
+	adminInteractionHandler := NewAdminInteractionHandler(configRepo, interactionRepo)
 	admin := app.Group("/admin")
 	admin.Use(middleware.NewAuthMiddleware(authorService).Handle)
 	admin.Get("/", adminHandler.Handle)
@@ -63,6 +67,7 @@ func NewWebApp(
 	admin.Get("/binaries/", binaryManageHandler.Handle)
 	admin.Post("/binaries/new/", binaryManageHandler.HandleUpload)
 	admin.Post("/binaries/delete", binaryManageHandler.HandleDelete)
+	admin.Post("/interactions/:id/delete/", adminInteractionHandler.HandleDelete)
 
 	// Editor
 	editor := app.Group("/editor")
@@ -111,6 +116,8 @@ func NewWebApp(
 	app.Get("/index.xml", rssHandler.Handle)
 	// Posts
 	app.Get("/posts/:post/", entryHandler.Handle)
+	// Webmention
+	app.Post("/webmention/", webmentionHandler.Handle)
 	// robots.txt
 	app.Get("/robots.txt", func(c *fiber.Ctx) error {
 		siteConfig := model.SiteConfig{}

web/entry_handler.go

@@ -14,12 +14,14 @@ type EntryHandler struct {
 	entrySvc        *app.EntryService
 	authorSvc       *app.AuthorService
 	registry        *app.EntryTypeRegistry
+	interactionRepo repository.InteractionRepository
 }
 
 type entryData struct {
 	Entry        model.Entry
 	Author       *model.Author
 	LoggedIn     bool
+	Interactions []model.Interaction
 }
 
 func NewEntryHandler(
@@ -27,12 +29,14 @@ func NewEntryHandler(
 	registry *app.EntryTypeRegistry,
 	authorService *app.AuthorService,
 	configRepo repository.ConfigRepository,
+	interactionRepo repository.InteractionRepository,
 ) *EntryHandler {
 	return &EntryHandler{
 		entrySvc:        entryService,
 		authorSvc:       authorService,
 		registry:        registry,
 		configRepo:      configRepo,
+		interactionRepo: interactionRepo,
 	}
 }
 
@@ -58,6 +62,8 @@ func (h *EntryHandler) Handle(c *fiber.Ctx) error {
 		author = &model.Author{}
 	}
 
+	inters, _ := h.interactionRepo.FindAll(entry.ID())
+
 	return render.RenderTemplateWithBase(
 		c,
 		getSiteConfig(h.configRepo),
@@ -66,6 +72,7 @@ func (h *EntryHandler) Handle(c *fiber.Ctx) error {
 			Entry:        entry,
 			Author:       author,
 			LoggedIn:     loggedIn,
+			Interactions: inters,
 		},
 	)
 }

web/webmention_handler.go

@@ -0,0 +1,59 @@
+package web
+
+import (
+	"owl-blogs/app"
+	"owl-blogs/app/repository"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+type WebmentionHandler struct {
+	configRepo        repository.ConfigRepository
+	webmentionService *app.WebmentionService
+}
+
+func NewWebmentionHandler(
+	webmentionService *app.WebmentionService,
+	configRepo repository.ConfigRepository,
+) *WebmentionHandler {
+	return &WebmentionHandler{
+		webmentionService: webmentionService,
+		configRepo:        configRepo,
+	}
+}
+
+func (h *WebmentionHandler) Handle(c *fiber.Ctx) error {
+	target := c.FormValue("target")
+	source := c.FormValue("source")
+
+	println("Incoming webmention")
+	println("target", target)
+	println("source", source)
+
+	if target == "" {
+		return c.Status(400).SendString("target is required")
+	}
+	if source == "" {
+		return c.Status(400).SendString("source is required")
+	}
+
+	if len(target) < 7 || (target[:7] != "http://" && target[:8] != "https://") {
+		return c.Status(400).SendString("target must be a valid URL")
+	}
+
+	if len(source) < 7 || (source[:7] != "http://" && source[:8] != "https://") {
+		return c.Status(400).SendString("source must be a valid URL")
+	}
+
+	if source == target {
+		return c.Status(400).SendString("source and target must be different")
+	}
+
+	err := h.webmentionService.ProcessWebmention(source, target)
+	if err != nil {
+		return err
+	}
+
+	return c.SendString("ok")
+
+}