Added rich tooltips for 7tv emote links

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Added link preview support for 7tv emote links. (#155)
 - Skip lilliput if image is below maxThumbnailSize. (#184)
 
 ## 1.2.0

internal/resolvers/default/resolver.go

@@ -12,6 +12,7 @@ import (
 	"github.com/Chatterino/api/internal/resolvers/imgur"
 	"github.com/Chatterino/api/internal/resolvers/livestreamfails"
 	"github.com/Chatterino/api/internal/resolvers/oembed"
+	"github.com/Chatterino/api/internal/resolvers/seventv"
 	"github.com/Chatterino/api/internal/resolvers/supinic"
 	"github.com/Chatterino/api/internal/resolvers/twitch"
 	"github.com/Chatterino/api/internal/resolvers/twitter"
@@ -106,6 +107,7 @@ func New(cfg config.APIConfig) *R {
 	r.customResolvers = append(r.customResolvers, twitter.New(cfg)...)
 	r.customResolvers = append(r.customResolvers, wikipedia.New(cfg)...)
 	r.customResolvers = append(r.customResolvers, youtube.New(cfg)...)
+	r.customResolvers = append(r.customResolvers, seventv.New(cfg)...)
 
 	return r
 }

internal/resolvers/seventv/check.go

@@ -0,0 +1,15 @@
+package seventv
+
+import (
+	"net/url"
+
+	"github.com/Chatterino/api/pkg/resolver"
+)
+
+func check(url *url.URL) bool {
+	if match, _ := resolver.MatchesHosts(url, domains); !match {
+		return false
+	}
+
+	return emotePathRegex.MatchString(url.Path)
+}

internal/resolvers/seventv/load.go

@@ -0,0 +1,133 @@
+package seventv
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/Chatterino/api/pkg/cache"
+	"github.com/Chatterino/api/pkg/resolver"
+	"github.com/Chatterino/api/pkg/utils"
+)
+
+func load(emoteHash string, r *http.Request) (interface{}, time.Duration, error) {
+	log.Println("[SevenTV] GET", emoteHash)
+
+	queryMap := map[string]interface{}{
+		"query": `
+query fetchEmote($id: String!) {
+	emote(id: $id) {
+		visibility
+		id
+		name
+		owner {
+			id
+			display_name
+		}
+	}
+}`,
+		"variables": map[string]string{
+			"id": emoteHash,
+		},
+	}
+
+	queryBytes, err := json.Marshal(queryMap)
+	if err != nil {
+		return &resolver.Response{
+			Status:  http.StatusInternalServerError,
+			Message: "SevenTV API request error" + resolver.CleanResponse(err.Error()),
+		}, cache.NoSpecialDur, nil
+	}
+
+	// Execute SevenTV API request
+	resp, err := resolver.RequestPOST(seventvAPIURL, string(queryBytes))
+	if err != nil {
+		return &resolver.Response{
+			Status:  http.StatusInternalServerError,
+			Message: "SevenTV API request error" + resolver.CleanResponse(err.Error()),
+		}, cache.NoSpecialDur, nil
+	}
+	defer resp.Body.Close()
+
+	// Read response into a string
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return &resolver.Response{
+			Status:  http.StatusInternalServerError,
+			Message: "SevenTV API http body read error " + resolver.CleanResponse(err.Error()),
+		}, cache.NoSpecialDur, nil
+	}
+
+	// Error out if the emote wasn't found or something else went wrong with the request
+	if resp.StatusCode < http.StatusOK || resp.StatusCode > http.StatusMultipleChoices {
+		return emoteNotFoundResponse, cache.NoSpecialDur, nil
+	}
+
+	var jsonResponse EmoteAPIResponse
+	if err := json.Unmarshal(body, &jsonResponse); err != nil {
+		return &resolver.Response{
+			Status:  http.StatusInternalServerError,
+			Message: "SevenTV API unmarshal error " + resolver.CleanResponse(err.Error()),
+		}, cache.NoSpecialDur, nil
+	}
+
+	// API returns Data.Emote as null if the emote wasn't found
+	if jsonResponse.Data.Emote == nil {
+		return emoteNotFoundResponse, cache.NoSpecialDur, nil
+	}
+
+	// Determine type of the emote based on visibility flags
+	visibility := jsonResponse.Data.Emote.Visibility
+	var emoteType []string
+
+	if utils.HasBits(visibility, EmoteVisibilityGlobal) {
+		emoteType = append(emoteType, "Global")
+	}
+
+	if utils.HasBits(visibility, EmoteVisibilityPrivate) {
+		emoteType = append(emoteType, "Private")
+	}
+
+	// Default to Shared emote
+	if len(emoteType) == 0 {
+		emoteType = append(emoteType, "Shared")
+	}
+
+	// Build tooltip data from the API response
+	data := TooltipData{
+		Code:     jsonResponse.Data.Emote.Name,
+		Type:     strings.Join(emoteType, " "),
+		Uploader: jsonResponse.Data.Emote.Owner.DisplayName,
+		Unlisted: utils.HasBits(visibility, EmoteVisibilityHidden),
+	}
+
+	// Build a tooltip using the tooltip template (see tooltipTemplate) with the data we massaged above
+	var tooltip bytes.Buffer
+	if err := seventvEmoteTemplate.Execute(&tooltip, data); err != nil {
+		return &resolver.Response{
+			Status:  http.StatusInternalServerError,
+			Message: "SevenTV emote template error " + resolver.CleanResponse(err.Error()),
+		}, cache.NoSpecialDur, nil
+	}
+
+	// Success
+	successTooltip := &resolver.Response{
+		Status:    http.StatusOK,
+		Tooltip:   url.PathEscape(tooltip.String()),
+		Thumbnail: utils.FormatThumbnailURL(baseURL, r, fmt.Sprintf(thumbnailFormat, emoteHash)),
+		Link:      fmt.Sprintf("https://7tv.app/emotes/%s", emoteHash),
+	}
+
+	// Hide thumbnail for unlisted or hidden emotes pajaS
+	if data.Unlisted {
+		successTooltip.Thumbnail = ""
+	}
+
+	return successTooltip, cache.NoSpecialDur, nil
+}

internal/resolvers/seventv/load_test.go

@@ -0,0 +1,136 @@
+package seventv
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/Chatterino/api/pkg/resolver"
+	"github.com/go-chi/chi/v5"
+
+	qt "github.com/frankban/quicktest"
+)
+
+var (
+	emotes = map[string]EmoteAPIResponse{}
+)
+
+func init() {
+	emotes["Pajawalk"] = EmoteAPIResponse{
+		Data: EmoteAPIResponseData{
+			Emote: &EmoteAPIEmote{
+				ID:         "604281c81ae70f000d47ffd9",
+				Name:       "Pajawalk",
+				Visibility: EmoteVisibilityPrivate,
+				Owner: EmoteAPIUser{
+					ID:          "603d10e496832ffa787ca53c",
+					DisplayName: "durado_",
+				},
+			},
+		},
+	}
+
+	emotes["Hidden"] = EmoteAPIResponse{
+		Data: EmoteAPIResponseData{
+			Emote: &EmoteAPIEmote{
+				ID:         "604281c81ae70f000d47ffd9",
+				Name:       "Hidden",
+				Visibility: EmoteVisibilityPrivate | EmoteVisibilityHidden,
+				Owner: EmoteAPIUser{
+					ID:          "603d10e496832ffa787ca53c",
+					DisplayName: "durado_",
+				},
+			},
+		},
+	}
+}
+
+func TestFoo(t *testing.T) {
+	c := qt.New(t)
+
+	r := chi.NewRouter()
+	r.Post("/v2/gql", func(w http.ResponseWriter, r *http.Request) {
+		type gqlQuery struct {
+			Query     string            `json:"string"`
+			Variables map[string]string `json:"variables"`
+		}
+
+		var q gqlQuery
+
+		xd, _ := ioutil.ReadAll(r.Body)
+		err := json.Unmarshal(xd, &q)
+		if err != nil {
+			panic(err)
+		}
+		if response, ok := emotes[q.Variables["id"]]; ok {
+			b, _ := json.Marshal(&response)
+
+			w.Header().Set("Content-Type", "application/json")
+			w.Write(b)
+			return
+		}
+
+		// TODO: return 404
+	})
+	ts := httptest.NewServer(r)
+	defer ts.Close()
+	seventvAPIURL = ts.URL + "/v2/gql"
+
+	type tTest struct {
+		emoteHash       string
+		expectedTooltip string
+	}
+
+	tests := []tTest{
+		{
+			emoteHash: "Pajawalk",
+			expectedTooltip: `<div style="text-align: left;">
+<b>Pajawalk</b><br>
+<b>Private SevenTV Emote</b><br>
+<b>By:</b> durado_
+</div>`,
+		},
+		{
+			emoteHash: "Hidden",
+			expectedTooltip: `<div style="text-align: left;">
+<b>Hidden</b><br>
+<b>Private SevenTV Emote</b><br>
+<b>By:</b> durado_
+<li><b><span style="color: red;">UNLISTED</span></b></li>
+</div>`,
+		},
+		// TODO: Global emote
+		// TODO: Private emote
+		// TODO: Combined emote types
+		// TODO: Default emote type (shared)
+		// TODO: Thumbnails
+		// TODO: emote not found (404)
+	}
+
+	request, _ := http.NewRequest(http.MethodPost, "https://7tv.app/test", nil)
+
+	for _, test := range tests {
+		iret, _, err := load(test.emoteHash, request)
+
+		c.Assert(err, qt.IsNil)
+		c.Assert(iret, qt.Not(qt.IsNil))
+
+		response := iret.(*resolver.Response)
+
+		c.Assert(response, qt.Not(qt.IsNil))
+
+		c.Assert(response.Status, qt.Equals, 200)
+
+		// TODO: check thumbnail
+		// c.Assert(response.Thumbnail, qt.Equals, fmt.Sprintf(thumbnailFormat, test.emoteHash))
+
+		// TODO: check error
+		cleanTooltip, unescapeErr := url.PathUnescape(response.Tooltip)
+		c.Assert(unescapeErr, qt.IsNil)
+
+		c.Assert(cleanTooltip, qt.Equals, test.expectedTooltip)
+	}
+}

internal/resolvers/seventv/model.go

@@ -0,0 +1,41 @@
+package seventv
+
+type EmoteAPIUser struct {
+	ID          string `json:"id"`
+	DisplayName string `json:"display_name"`
+}
+
+type EmoteAPIEmote struct {
+	ID         string       `json:"id"`
+	Name       string       `json:"name"`
+	Visibility int32        `json:"visibility"`
+	Owner      EmoteAPIUser `json:"owner"`
+}
+
+type EmoteAPIResponseData struct {
+	Emote *EmoteAPIEmote `json:"emote,omitempty"`
+}
+
+type EmoteAPIResponse struct {
+	Data EmoteAPIResponseData `json:"data"`
+}
+
+type TooltipData struct {
+	Code     string
+	Type     string
+	Uploader string
+
+	Unlisted bool
+}
+
+const (
+	EmoteVisibilityPrivate int32 = 1 << iota
+	EmoteVisibilityGlobal
+	EmoteVisibilityHidden
+	EmoteVisibilityOverrideBTTV
+	EmoteVisibilityOverrideFFZ
+	EmoteVisibilityOverrideTwitchGlobal
+	EmoteVisibilityOverrideTwitchSubscriber
+
+	EmoteVisibilityAll int32 = (1 << iota) - 1
+)