[feature] Add `/api/v1/admin/custom_emojis/{id}` endpoint for single emoji GET (#910)

* fix error in prev swagger docs

* add GET for single admin emoji

5 files changed, 361 insertions, 170 deletions

diff --git a/internal/api/client/admin/admin_test.go b/internal/api/client/admin/admin_test.go
index 5017afd05..ce026a67b 100644
--- a/internal/api/client/admin/admin_test.go
+++ b/internal/api/client/admin/admin_test.go
@@ -60,6 +60,7 @@ type AdminStandardTestSuite struct {
 	testAccounts     map[string]*gtsmodel.Account
 	testAttachments  map[string]*gtsmodel.MediaAttachment
 	testStatuses     map[string]*gtsmodel.Status
+	testEmojis       map[string]*gtsmodel.Emoji
 
 	// module being tested
 	adminModule *admin.Module
@@ -73,6 +74,7 @@ func (suite *AdminStandardTestSuite) SetupSuite() {
 	suite.testAccounts = testrig.NewTestAccounts()
 	suite.testAttachments = testrig.NewTestAttachments()
 	suite.testStatuses = testrig.NewTestStatuses()
+	suite.testEmojis = testrig.NewTestEmojis()
 }
 
 func (suite *AdminStandardTestSuite) SetupTest() {
diff --git a/internal/api/client/admin/emojiget.go b/internal/api/client/admin/emojiget.go
index 7c44f45d4..60f7d5948 100644
--- a/internal/api/client/admin/emojiget.go
+++ b/internal/api/client/admin/emojiget.go
@@ -19,27 +19,19 @@
 package admin
 
 import (
+	"errors"
 	"fmt"
 	"net/http"
-	"strconv"
-	"strings"
 
 	"github.com/gin-gonic/gin"
 	"github.com/superseriousbusiness/gotosocial/internal/api"
-	"github.com/superseriousbusiness/gotosocial/internal/config"
-	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 )
 
-// EmojisGETHandler swagger:operation GET /api/v1/admin/custom_emojis emojisGet
+// EmojiGETHandler swagger:operation GET /api/v1/admin/custom_emojis/{id} emojiGet
 //
-// View local and remote emojis available to / known by this instance.
-//
-// The next and previous queries can be parsed from the returned Link header.
-// Example:
-//
-// `<http://localhost:8080/api/v1/admin/custom_emojis?limit=30&max_shortcode_domain=yell@fossbros-anonymous.io&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=30&min_shortcode_domain=rainbow@&filter=domain:all>; rel="prev"`
+// Get the admin view of a single emoji.
 //
 //	---
 //	tags:
@@ -50,66 +42,17 @@ import (
 //
 //	parameters:
 //	-
-//		name: filter
+//		name: id
 //		type: string
-//		description: |-
-//			Comma-separated list of filters to apply to results. Recognized filters are:
-//
-//			`domain:[domain]` -- show emojis from the given domain, eg `?filter=domain:example.org` will show emojis from `example.org` only.
-//			Instead of giving a specific domain, you can also give either one of the key words `local` or `all` to show either local emojis only (`domain:local`) or show all emojis from all domains (`domain:all`).
-//			Note: `domain:*` is equivalent to `domain:all` (including local).
-//			If no domain filter is provided, `domain:all` will be assumed.
-//
-//			`disabled` -- include emojis that have been disabled.
-//
-//			`enabled` -- include emojis that are enabled.
-//
-//			`shortcode:[shortcode]` -- show only emojis with the given shortcode, eg `?filter=shortcode:blob_cat_uwu` will show only emojis with the shortcode `blob_cat_uwu` (case sensitive).
-//
-//			If neither `disabled` or `enabled` are provided, both disabled and enabled emojis will be shown.
-//
-//			If no filter query string is provided, the default `domain:all` will be used, which will show all emojis from all domains.
-//		in: query
-//		required: false
-//		default: "domain:all"
-//	-
-//		name: limit
-//		type: integer
-//		description: Number of emojis to return. Less than 1, or not set, means unlimited (all emojis).
-//		default: 50
-//		in: query
-//	-
-//		name: max_shortcode_domain
-//		type: string
-//		description: >-
-//			Return only emojis with `[shortcode]@[domain]` *LOWER* (alphabetically) than given `[shortcode]@[domain]`.
-//			For example, if `max_shortcode_domain=beep@example.org`, then returned values might include emojis with
-//			`[shortcode]@[domain]`s like `car@example.org`, `debian@aaa.com`, `test@` (local emoji), etc.
-//
-//			Emoji with the given `[shortcode]@[domain]` will not be included in the result set.
-//		in: query
-//	-
-//		name: min_shortcode_domain
-//		type: string
-//		description: >-
-//			Return only emojis with `[shortcode]@[domain]` *HIGHER* (alphabetically) than given `[shortcode]@[domain]`.
-//			For example, if `max_shortcode_domain=beep@example.org`, then returned values might include emojis with
-//			`[shortcode]@[domain]`s like `arse@test.com`, `0101_binary@hackers.net`, `bee@` (local emoji), etc.
-//
-//			Emoji with the given `[shortcode]@[domain]` will not be included in the result set.
-//		in: query
+//		description: The id of the emoji.
+//		in: path
+//		required: true
 //
 //	responses:
 //		'200':
-//			headers:
-//				Link:
-//					type: string
-//					description: Links to the next and previous queries.
-//			description: An array of emojis, arranged alphabetically by shortcode and domain.
+//			description: A single emoji.
 //			schema:
-//				type: array
-//				items:
-//					"$ref": "#/definitions/adminEmoji"
+//				"$ref": "#/definitions/adminEmoji"
 //		'400':
 //			description: bad request
 //		'401':
@@ -122,7 +65,7 @@ import (
 //			description: not acceptable
 //		'500':
 //			description: internal server error
-func (m *Module) EmojisGETHandler(c *gin.Context) {
+func (m *Module) EmojiGETHandler(c *gin.Context) {
 	authed, err := oauth.Authed(c, true, true, true, true)
 	if err != nil {
 		api.ErrorHandler(c, gtserror.NewErrorUnauthorized(err, err.Error()), m.processor.InstanceGet)
@@ -140,72 +83,18 @@ func (m *Module) EmojisGETHandler(c *gin.Context) {
 		return
 	}
 
-	maxShortcodeDomain := c.Query(MaxShortcodeDomainKey)
-	minShortcodeDomain := c.Query(MinShortcodeDomainKey)
-
-	limit := 50
-	limitString := c.Query(LimitKey)
-	if limitString != "" {
-		i, err := strconv.ParseInt(limitString, 10, 64)
-		if err != nil {
-			err := fmt.Errorf("error parsing %s: %s", LimitKey, err)
-			api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
-			return
-		}
-		limit = int(i)
-	}
-	if limit < 0 {
-		limit = 0
-	}
-
-	var domain string
-	var includeDisabled bool
-	var includeEnabled bool
-	var shortcode string
-	if filterParam := c.Query(FilterQueryKey); filterParam != "" {
-		filters := strings.Split(filterParam, ",")
-		for _, filter := range filters {
-			lower := strings.ToLower(filter)
-			switch {
-			case strings.HasPrefix(lower, "domain:"):
-				domain = strings.TrimPrefix(lower, "domain:")
-			case lower == "disabled":
-				includeDisabled = true
-			case lower == "enabled":
-				includeEnabled = true
-			case strings.HasPrefix(lower, "shortcode:"):
-				shortcode = strings.Trim(filter[10:], ":") // remove any errant ":"
-			default:
-				err := fmt.Errorf("filter %s not recognized; accepted values are 'domain:[domain]', 'disabled', 'enabled', 'shortcode:[shortcode]'", filter)
-				api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
-				return
-			}
-		}
-	}
-
-	if domain == "" {
-		// default is to show all domains
-		domain = db.EmojiAllDomains
-	} else if domain == "local" || domain == config.GetHost() || domain == config.GetAccountDomain() {
-		// pass empty string for local domain
-		domain = ""
-	}
-
-	// normalize filters
-	if !includeDisabled && !includeEnabled {
-		// include both if neither specified
-		includeDisabled = true
-		includeEnabled = true
+	emojiID := c.Param(IDKey)
+	if emojiID == "" {
+		err := errors.New("no emoji id specified")
+		api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
+		return
 	}
 
-	resp, errWithCode := m.processor.AdminEmojisGet(c.Request.Context(), authed, domain, includeDisabled, includeEnabled, shortcode, maxShortcodeDomain, minShortcodeDomain, limit)
+	emoji, errWithCode := m.processor.AdminEmojiGet(c.Request.Context(), authed, emojiID)
 	if errWithCode != nil {
 		api.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
 		return
 	}
 
-	if resp.LinkHeader != "" {
-		c.Header("Link", resp.LinkHeader)
-	}
-	c.JSON(http.StatusOK, resp.Items)
+	c.JSON(http.StatusOK, emoji)
 }
diff --git a/internal/api/client/admin/emojiget_test.go b/internal/api/client/admin/emojiget_test.go
index bba5561af..d94e2bf78 100644
--- a/internal/api/client/admin/emojiget_test.go
+++ b/internal/api/client/admin/emojiget_test.go
@@ -19,7 +19,6 @@
 package admin_test
 
 import (
-	"encoding/json"
 	"io"
 	"net/http"
 	"net/http/httptest"
@@ -27,86 +26,62 @@ import (
 
 	"github.com/stretchr/testify/suite"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/admin"
-	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 )
 
 type EmojiGetTestSuite struct {
 	AdminStandardTestSuite
 }
 
-func (suite *EmojiGetTestSuite) TestEmojiGet() {
+func (suite *EmojiGetTestSuite) TestEmojiGet1() {
 	recorder := httptest.NewRecorder()
+	testEmoji := suite.testEmojis["rainbow"]
 
-	path := admin.EmojiPath + "?filter=domain:all&limit=1"
+	path := admin.EmojiPathWithID
 	ctx := suite.newContext(recorder, http.MethodGet, nil, path, "application/json")
+	ctx.AddParam(admin.IDKey, testEmoji.ID)
 
-	suite.adminModule.EmojisGETHandler(ctx)
+	suite.adminModule.EmojiGETHandler(ctx)
 	suite.Equal(http.StatusOK, recorder.Code)
 
 	b, err := io.ReadAll(recorder.Body)
 	suite.NoError(err)
 	suite.NotNil(b)
 
-	apiEmojis := []*apimodel.AdminEmoji{}
-	if err := json.Unmarshal(b, &apiEmojis); err != nil {
-		suite.FailNow(err.Error())
-	}
-
-	suite.Len(apiEmojis, 1)
-	suite.Equal("rainbow", apiEmojis[0].Shortcode)
-	suite.Equal("", apiEmojis[0].Domain)
-
-	suite.Equal(`<http://localhost:8080/api/v1/admin/custom_emojis?limit=1&max_shortcode_domain=rainbow@&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=1&min_shortcode_domain=rainbow@&filter=domain:all>; rel="prev"`, recorder.Header().Get("link"))
+	suite.Equal(`{"shortcode":"rainbow","url":"http://localhost:8080/fileserver/01F8MH17FWEB39HZJ76B6VXSKF/emoji/original/01F8MH9H8E4VG3KDYJR9EGPXCQ.png","static_url":"http://localhost:8080/fileserver/01F8MH17FWEB39HZJ76B6VXSKF/emoji/static/01F8MH9H8E4VG3KDYJR9EGPXCQ.png","visible_in_picker":true,"id":"01F8MH9H8E4VG3KDYJR9EGPXCQ","disabled":false,"updated_at":"2021-09-20T10:40:37.000Z","total_file_size":47115,"content_type":"image/png","uri":"http://localhost:8080/emoji/01F8MH9H8E4VG3KDYJR9EGPXCQ"}`, string(b))
 }
 
 func (suite *EmojiGetTestSuite) TestEmojiGet2() {
 	recorder := httptest.NewRecorder()
+	testEmoji := suite.testEmojis["yell"]
 
-	path := admin.EmojiPath + "?filter=domain:all&limit=1&max_shortcode_domain=rainbow@"
+	path := admin.EmojiPathWithID
 	ctx := suite.newContext(recorder, http.MethodGet, nil, path, "application/json")
+	ctx.AddParam(admin.IDKey, testEmoji.ID)
 
-	suite.adminModule.EmojisGETHandler(ctx)
+	suite.adminModule.EmojiGETHandler(ctx)
 	suite.Equal(http.StatusOK, recorder.Code)
 
 	b, err := io.ReadAll(recorder.Body)
 	suite.NoError(err)
 	suite.NotNil(b)
 
-	apiEmojis := []*apimodel.AdminEmoji{}
-	if err := json.Unmarshal(b, &apiEmojis); err != nil {
-		suite.FailNow(err.Error())
-	}
-
-	suite.Len(apiEmojis, 1)
-	suite.Equal("yell", apiEmojis[0].Shortcode)
-	suite.Equal("fossbros-anonymous.io", apiEmojis[0].Domain)
-
-	suite.Equal(`<http://localhost:8080/api/v1/admin/custom_emojis?limit=1&max_shortcode_domain=yell@fossbros-anonymous.io&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=1&min_shortcode_domain=yell@fossbros-anonymous.io&filter=domain:all>; rel="prev"`, recorder.Header().Get("link"))
+	suite.Equal(`{"shortcode":"yell","url":"http://localhost:8080/fileserver/01GD5KR15NHTY8FZ01CD4D08XP/emoji/original/01GD5KP5CQEE1R3X43Y1EHS2CW.png","static_url":"http://localhost:8080/fileserver/01GD5KR15NHTY8FZ01CD4D08XP/emoji/static/01GD5KP5CQEE1R3X43Y1EHS2CW.png","visible_in_picker":false,"id":"01GD5KP5CQEE1R3X43Y1EHS2CW","disabled":false,"domain":"fossbros-anonymous.io","updated_at":"2020-03-18T12:12:00.000Z","total_file_size":21697,"content_type":"image/png","uri":"http://fossbros-anonymous.io/emoji/01GD5KP5CQEE1R3X43Y1EHS2CW"}`, string(b))
 }
 
-func (suite *EmojiGetTestSuite) TestEmojiGet3() {
+func (suite *EmojiGetTestSuite) TestEmojiGetNotFound() {
 	recorder := httptest.NewRecorder()
 
-	path := admin.EmojiPath + "?filter=domain:all&limit=1&min_shortcode_domain=yell@fossbros-anonymous.io"
+	path := admin.EmojiPathWithID
 	ctx := suite.newContext(recorder, http.MethodGet, nil, path, "application/json")
+	ctx.AddParam(admin.IDKey, "01GF8VRXX1R00X7XH8973Z29R1")
 
-	suite.adminModule.EmojisGETHandler(ctx)
-	suite.Equal(http.StatusOK, recorder.Code)
+	suite.adminModule.EmojiGETHandler(ctx)
+	suite.Equal(http.StatusNotFound, recorder.Code)
 
 	b, err := io.ReadAll(recorder.Body)
 	suite.NoError(err)
 	suite.NotNil(b)
-
-	apiEmojis := []*apimodel.AdminEmoji{}
-	if err := json.Unmarshal(b, &apiEmojis); err != nil {
-		suite.FailNow(err.Error())
-	}
-
-	suite.Len(apiEmojis, 1)
-	suite.Equal("rainbow", apiEmojis[0].Shortcode)
-	suite.Equal("", apiEmojis[0].Domain)
-
-	suite.Equal(`<http://localhost:8080/api/v1/admin/custom_emojis?limit=1&max_shortcode_domain=rainbow@&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=1&min_shortcode_domain=rainbow@&filter=domain:all>; rel="prev"`, recorder.Header().Get("link"))
+	suite.Equal(`{"error":"Not Found"}`, string(b))
 }
 
 func TestEmojiGetTestSuite(t *testing.T) {
diff --git a/internal/api/client/admin/emojisget.go b/internal/api/client/admin/emojisget.go
new file mode 100644
index 000000000..7c44f45d4
--- /dev/null
+++ b/internal/api/client/admin/emojisget.go
@@ -0,0 +1,211 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package admin
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/api"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// EmojisGETHandler swagger:operation GET /api/v1/admin/custom_emojis emojisGet
+//
+// View local and remote emojis available to / known by this instance.
+//
+// The next and previous queries can be parsed from the returned Link header.
+// Example:
+//
+// `<http://localhost:8080/api/v1/admin/custom_emojis?limit=30&max_shortcode_domain=yell@fossbros-anonymous.io&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=30&min_shortcode_domain=rainbow@&filter=domain:all>; rel="prev"`
+//
+//	---
+//	tags:
+//	- admin
+//
+//	produces:
+//	- application/json
+//
+//	parameters:
+//	-
+//		name: filter
+//		type: string
+//		description: |-
+//			Comma-separated list of filters to apply to results. Recognized filters are:
+//
+//			`domain:[domain]` -- show emojis from the given domain, eg `?filter=domain:example.org` will show emojis from `example.org` only.
+//			Instead of giving a specific domain, you can also give either one of the key words `local` or `all` to show either local emojis only (`domain:local`) or show all emojis from all domains (`domain:all`).
+//			Note: `domain:*` is equivalent to `domain:all` (including local).
+//			If no domain filter is provided, `domain:all` will be assumed.
+//
+//			`disabled` -- include emojis that have been disabled.
+//
+//			`enabled` -- include emojis that are enabled.
+//
+//			`shortcode:[shortcode]` -- show only emojis with the given shortcode, eg `?filter=shortcode:blob_cat_uwu` will show only emojis with the shortcode `blob_cat_uwu` (case sensitive).
+//
+//			If neither `disabled` or `enabled` are provided, both disabled and enabled emojis will be shown.
+//
+//			If no filter query string is provided, the default `domain:all` will be used, which will show all emojis from all domains.
+//		in: query
+//		required: false
+//		default: "domain:all"
+//	-
+//		name: limit
+//		type: integer
+//		description: Number of emojis to return. Less than 1, or not set, means unlimited (all emojis).
+//		default: 50
+//		in: query
+//	-
+//		name: max_shortcode_domain
+//		type: string
+//		description: >-
+//			Return only emojis with `[shortcode]@[domain]` *LOWER* (alphabetically) than given `[shortcode]@[domain]`.
+//			For example, if `max_shortcode_domain=beep@example.org`, then returned values might include emojis with
+//			`[shortcode]@[domain]`s like `car@example.org`, `debian@aaa.com`, `test@` (local emoji), etc.
+//
+//			Emoji with the given `[shortcode]@[domain]` will not be included in the result set.
+//		in: query
+//	-
+//		name: min_shortcode_domain
+//		type: string
+//		description: >-
+//			Return only emojis with `[shortcode]@[domain]` *HIGHER* (alphabetically) than given `[shortcode]@[domain]`.
+//			For example, if `max_shortcode_domain=beep@example.org`, then returned values might include emojis with
+//			`[shortcode]@[domain]`s like `arse@test.com`, `0101_binary@hackers.net`, `bee@` (local emoji), etc.
+//
+//			Emoji with the given `[shortcode]@[domain]` will not be included in the result set.
+//		in: query
+//
+//	responses:
+//		'200':
+//			headers:
+//				Link:
+//					type: string
+//					description: Links to the next and previous queries.
+//			description: An array of emojis, arranged alphabetically by shortcode and domain.
+//			schema:
+//				type: array
+//				items:
+//					"$ref": "#/definitions/adminEmoji"
+//		'400':
+//			description: bad request
+//		'401':
+//			description: unauthorized
+//		'403':
+//			description: forbidden
+//		'404':
+//			description: not found
+//		'406':
+//			description: not acceptable
+//		'500':
+//			description: internal server error
+func (m *Module) EmojisGETHandler(c *gin.Context) {
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		api.ErrorHandler(c, gtserror.NewErrorUnauthorized(err, err.Error()), m.processor.InstanceGet)
+		return
+	}
+
+	if !*authed.User.Admin {
+		err := fmt.Errorf("user %s not an admin", authed.User.ID)
+		api.ErrorHandler(c, gtserror.NewErrorForbidden(err, err.Error()), m.processor.InstanceGet)
+		return
+	}
+
+	if _, err := api.NegotiateAccept(c, api.JSONAcceptHeaders...); err != nil {
+		api.ErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGet)
+		return
+	}
+
+	maxShortcodeDomain := c.Query(MaxShortcodeDomainKey)
+	minShortcodeDomain := c.Query(MinShortcodeDomainKey)
+
+	limit := 50
+	limitString := c.Query(LimitKey)
+	if limitString != "" {
+		i, err := strconv.ParseInt(limitString, 10, 64)
+		if err != nil {
+			err := fmt.Errorf("error parsing %s: %s", LimitKey, err)
+			api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
+			return
+		}
+		limit = int(i)
+	}
+	if limit < 0 {
+		limit = 0
+	}
+
+	var domain string
+	var includeDisabled bool
+	var includeEnabled bool
+	var shortcode string
+	if filterParam := c.Query(FilterQueryKey); filterParam != "" {
+		filters := strings.Split(filterParam, ",")
+		for _, filter := range filters {
+			lower := strings.ToLower(filter)
+			switch {
+			case strings.HasPrefix(lower, "domain:"):
+				domain = strings.TrimPrefix(lower, "domain:")
+			case lower == "disabled":
+				includeDisabled = true
+			case lower == "enabled":
+				includeEnabled = true
+			case strings.HasPrefix(lower, "shortcode:"):
+				shortcode = strings.Trim(filter[10:], ":") // remove any errant ":"
+			default:
+				err := fmt.Errorf("filter %s not recognized; accepted values are 'domain:[domain]', 'disabled', 'enabled', 'shortcode:[shortcode]'", filter)
+				api.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGet)
+				return
+			}
+		}
+	}
+
+	if domain == "" {
+		// default is to show all domains
+		domain = db.EmojiAllDomains
+	} else if domain == "local" || domain == config.GetHost() || domain == config.GetAccountDomain() {
+		// pass empty string for local domain
+		domain = ""
+	}
+
+	// normalize filters
+	if !includeDisabled && !includeEnabled {
+		// include both if neither specified
+		includeDisabled = true
+		includeEnabled = true
+	}
+
+	resp, errWithCode := m.processor.AdminEmojisGet(c.Request.Context(), authed, domain, includeDisabled, includeEnabled, shortcode, maxShortcodeDomain, minShortcodeDomain, limit)
+	if errWithCode != nil {
+		api.ErrorHandler(c, errWithCode, m.processor.InstanceGet)
+		return
+	}
+
+	if resp.LinkHeader != "" {
+		c.Header("Link", resp.LinkHeader)
+	}
+	c.JSON(http.StatusOK, resp.Items)
+}
diff --git a/internal/api/client/admin/emojisget_test.go b/internal/api/client/admin/emojisget_test.go
new file mode 100644
index 000000000..07f0b49eb
--- /dev/null
+++ b/internal/api/client/admin/emojisget_test.go
@@ -0,0 +1,114 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package admin_test
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/admin"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+)
+
+type EmojisGetTestSuite struct {
+	AdminStandardTestSuite
+}
+
+func (suite *EmojisGetTestSuite) TestEmojiGet() {
+	recorder := httptest.NewRecorder()
+
+	path := admin.EmojiPath + "?filter=domain:all&limit=1"
+	ctx := suite.newContext(recorder, http.MethodGet, nil, path, "application/json")
+
+	suite.adminModule.EmojisGETHandler(ctx)
+	suite.Equal(http.StatusOK, recorder.Code)
+
+	b, err := io.ReadAll(recorder.Body)
+	suite.NoError(err)
+	suite.NotNil(b)
+
+	apiEmojis := []*apimodel.AdminEmoji{}
+	if err := json.Unmarshal(b, &apiEmojis); err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(apiEmojis, 1)
+	suite.Equal("rainbow", apiEmojis[0].Shortcode)
+	suite.Equal("", apiEmojis[0].Domain)
+
+	suite.Equal(`<http://localhost:8080/api/v1/admin/custom_emojis?limit=1&max_shortcode_domain=rainbow@&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=1&min_shortcode_domain=rainbow@&filter=domain:all>; rel="prev"`, recorder.Header().Get("link"))
+}
+
+func (suite *EmojisGetTestSuite) TestEmojiGet2() {
+	recorder := httptest.NewRecorder()
+
+	path := admin.EmojiPath + "?filter=domain:all&limit=1&max_shortcode_domain=rainbow@"
+	ctx := suite.newContext(recorder, http.MethodGet, nil, path, "application/json")
+
+	suite.adminModule.EmojisGETHandler(ctx)
+	suite.Equal(http.StatusOK, recorder.Code)
+
+	b, err := io.ReadAll(recorder.Body)
+	suite.NoError(err)
+	suite.NotNil(b)
+
+	apiEmojis := []*apimodel.AdminEmoji{}
+	if err := json.Unmarshal(b, &apiEmojis); err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(apiEmojis, 1)
+	suite.Equal("yell", apiEmojis[0].Shortcode)
+	suite.Equal("fossbros-anonymous.io", apiEmojis[0].Domain)
+
+	suite.Equal(`<http://localhost:8080/api/v1/admin/custom_emojis?limit=1&max_shortcode_domain=yell@fossbros-anonymous.io&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=1&min_shortcode_domain=yell@fossbros-anonymous.io&filter=domain:all>; rel="prev"`, recorder.Header().Get("link"))
+}
+
+func (suite *EmojisGetTestSuite) TestEmojiGet3() {
+	recorder := httptest.NewRecorder()
+
+	path := admin.EmojiPath + "?filter=domain:all&limit=1&min_shortcode_domain=yell@fossbros-anonymous.io"
+	ctx := suite.newContext(recorder, http.MethodGet, nil, path, "application/json")
+
+	suite.adminModule.EmojisGETHandler(ctx)
+	suite.Equal(http.StatusOK, recorder.Code)
+
+	b, err := io.ReadAll(recorder.Body)
+	suite.NoError(err)
+	suite.NotNil(b)
+
+	apiEmojis := []*apimodel.AdminEmoji{}
+	if err := json.Unmarshal(b, &apiEmojis); err != nil {
+		suite.FailNow(err.Error())
+	}
+
+	suite.Len(apiEmojis, 1)
+	suite.Equal("rainbow", apiEmojis[0].Shortcode)
+	suite.Equal("", apiEmojis[0].Domain)
+
+	suite.Equal(`<http://localhost:8080/api/v1/admin/custom_emojis?limit=1&max_shortcode_domain=rainbow@&filter=domain:all>; rel="next", <http://localhost:8080/api/v1/admin/custom_emojis?limit=1&min_shortcode_domain=rainbow@&filter=domain:all>; rel="prev"`, recorder.Header().Get("link"))
+}
+
+func TestEmojisGetTestSuite(t *testing.T) {
+	suite.Run(t, &EmojisGetTestSuite{})
+}