[feature] Allow emoji shortcode to be 1-character length (#3556)

* [feature] Allow emoji shortcode to be 1-character length

* testerino fixeroni

* spaghet

docs/api/swagger.yaml

@@ -4920,7 +4920,7 @@ paths:
                 - description: The code to use for the emoji, which will be used by instance denizens to select it. This must be unique on the instance.
                   in: formData
                   name: shortcode
-                  pattern: \w{2,30}
+                  pattern: \w{1,30}
                   required: true
                   type: string
                 - description: A png or gif image of the emoji. Animated pngs work too! To ensure compatibility with other fedi implementations, emoji size limit is 50kb by default.
@@ -5066,7 +5066,7 @@ paths:
                 - description: The code to use for the emoji, which will be used by instance denizens to select it. This must be unique on the instance. Works for the `copy` action type only.
                   in: formData
                   name: shortcode
-                  pattern: \w{2,30}
+                  pattern: \w{1,30}
                   type: string
                 - description: A new png or gif image to use for the emoji. Animated pngs work too! To ensure compatibility with other fedi implementations, emoji size limit is 50kb by default. Works for LOCAL emojis only.
                   in: formData

internal/api/client/admin/emojicreate.go

@@ -53,7 +53,7 @@
 //			The code to use for the emoji, which will be used by instance denizens to select it.
 //			This must be unique on the instance.
 //		type: string
-//		pattern: \w{2,30}
+//		pattern: \w{1,30}
 //		required: true
 //	-
 //		name: image

internal/api/client/admin/emojiupdate.go

@@ -85,7 +85,7 @@
 //			The code to use for the emoji, which will be used by instance denizens to select it.
 //			This must be unique on the instance. Works for the `copy` action type only.
 //		type: string
-//		pattern: \w{2,30}
+//		pattern: \w{1,30}
 //	-
 //		name: image
 //		in: formData

internal/api/client/admin/emojiupdate_test.go

@@ -560,7 +560,7 @@ func (suite *EmojiUpdateTestSuite) TestEmojiUpdateCopyEmptyShortcode() {
 	b, err := io.ReadAll(result.Body)
 	suite.NoError(err)
 
-	suite.Equal(`{"error":"Bad Request: shortcode  did not pass validation, must be between 2 and 30 characters, letters, numbers, and underscores only"}`, string(b))
+	suite.Equal(`{"error":"Bad Request: shortcode  did not pass validation, must be between 1 and 30 characters, letters, numbers, and underscores only"}`, string(b))
 }
 
 func (suite *EmojiUpdateTestSuite) TestEmojiUpdateCopyNoShortcode() {

internal/regexes/regexes.go

@@ -46,7 +46,7 @@
 	domainGrp                = `(?:` + alphaNumeric + `|\.|\-|\:)`                       // Non-capturing group that matches against a single valid domain character.
 	mentionName              = `^@(` + usernameGrp + `+)(?:@(` + domainGrp + `+))?$`     // Extract parts of one mention, maybe including domain.
 	mentionFinder            = `(?:^|\s)(@` + usernameGrp + `+(?:@` + domainGrp + `+)?)` // Extract all mentions from a text, each mention may include domain.
-	emojiShortcode           = `\w{2,30}`                                                // Pattern for emoji shortcodes. maximumEmojiShortcodeLength = 30
+	emojiShortcode           = `\w{1,30}`                                                // Pattern for emoji shortcodes. maximumEmojiShortcodeLength = 30
 	emojiFinder              = `(?:\b)?:(` + emojiShortcode + `):(?:\b)?`                // Extract all emoji shortcodes from a text.
 	emojiValidator           = `^` + emojiShortcode + `$`                                // Validate a single emoji shortcode.
 	usernameStrict           = `^[a-z0-9_]{1,64}$`                                       // Pattern for usernames on THIS instance. maximumUsernameLength = 64

internal/validate/formvalidation.go

@@ -190,11 +190,11 @@ func CustomCSS(customCSS string) error {
 }
 
 // EmojiShortcode just runs the given shortcode through the regular expression
-// for emoji shortcodes, to figure out whether it's a valid shortcode, ie., 2-30 characters,
+// for emoji shortcodes, to figure out whether it's a valid shortcode, ie., 1-30 characters,
 // a-zA-Z, numbers, and underscores.
 func EmojiShortcode(shortcode string) error {
 	if !regexes.EmojiValidator.MatchString(shortcode) {
-		return fmt.Errorf("shortcode %s did not pass validation, must be between 2 and 30 characters, letters, numbers, and underscores only", shortcode)
+		return fmt.Errorf("shortcode %s did not pass validation, must be between 1 and 30 characters, letters, numbers, and underscores only", shortcode)
 	}
 	return nil
 }

internal/validate/formvalidation_test.go

@@ -345,7 +345,7 @@ type testStruct struct {
 		},
 		{
 			shortcode: "p",
-			ok:        false,
+			ok:        true,
 		},
 		{
 			shortcode: "pp",
@@ -361,6 +361,10 @@ type testStruct struct {
 		},
 		{
 			shortcode: "_",
+			ok:        true,
+		},
+		{
+			shortcode: "",
 			ok:        false,
 		},
 		{

web/source/settings/views/admin/emoji/local/new-emoji.tsx

@@ -119,7 +119,7 @@ export default function NewEmojiForm() {
 					label="Shortcode, must be unique among the instance's local emoji"
 					autoCapitalize="none"
 					spellCheck="false"
-					{...{pattern: "^\\w{2,30}$"}}
+					{...{pattern: "^\\w{1,30}$"}}
 				/>
 
 				<CategorySelect

web/source/settings/views/admin/emoji/local/use-shortcode.ts

@@ -22,7 +22,7 @@ import { useMemo } from "react";
 import { useTextInput } from "../../../../lib/form";
 import { useListEmojiQuery } from "../../../../lib/query/admin/custom-emoji";
 
-const shortcodeRegex = /^\w{2,30}$/;
+const shortcodeRegex = /^\w{1,30}$/;
 
 export default function useShortcode() {
 	const { data: emoji = [] } = useListEmojiQuery({
@@ -42,8 +42,8 @@ export default function useShortcode() {
 				return "Shortcode already in use";
 			}
 
-			if (code.length < 2 || code.length > 30) {
+			if (code.length < 1 || code.length > 30) {
-				return "Shortcode must be between 2 and 30 characters";
+				return "Shortcode must be between 1 and 30 characters";
 			}
 
 			if (!shortcodeRegex.test(code)) {