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Diffstat (limited to 'internal/regexes/regexes.go')
| -rw-r--r-- | internal/regexes/regexes.go | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/internal/regexes/regexes.go b/internal/regexes/regexes.go new file mode 100644 index 000000000..53446ff2c --- /dev/null +++ b/internal/regexes/regexes.go @@ -0,0 +1,136 @@ +/* + GoToSocial + Copyright (C) 2021 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 regexes + +import ( + "fmt" + "regexp" +) + +const ( + users = "users" + actors = "actors" + statuses = "statuses" + inbox = "inbox" + outbox = "outbox" + followers = "followers" + following = "following" + liked = "liked" + collections = "collections" + featured = "featured" + publicKey = "main-key" + follow = "follow" + update = "updates" + blocks = "blocks" +) + +const ( + maximumUsernameLength = 64 + maximumEmojiShortcodeLength = 30 + maximumHashtagLength = 30 +) + +var ( + mentionName = `^@(\w+)(?:@([a-zA-Z0-9_\-\.:]+)?)$` + // MentionName captures the username and domain part from a mention string + // such as @whatever_user@example.org, returning whatever_user and example.org (without the @ symbols) + MentionName = regexp.MustCompile(mentionName) + + // mention regex can be played around with here: https://regex101.com/r/qwM9D3/1 + mentionFinder = `(?:\B)(@\w+(?:@[a-zA-Z0-9_\-\.]+)?)(?:\B)?` + // MentionFinder extracts mentions from a piece of text. + MentionFinder = regexp.MustCompile(mentionFinder) + + // hashtag regex can be played with here: https://regex101.com/r/bPxeca/1 + hashtagFinder = fmt.Sprintf(`(?:^|\n|\s)(#[a-zA-Z0-9]{1,%d})(?:\b)`, maximumHashtagLength) + // HashtagFinder finds possible hashtags in a string. + // It returns just the string part of the hashtag, not the # symbol. + HashtagFinder = regexp.MustCompile(hashtagFinder) + + emojiShortcode = fmt.Sprintf(`\w{2,%d}`, maximumEmojiShortcodeLength) + // EmojiShortcode validates an emoji name. + EmojiShortcode = regexp.MustCompile(fmt.Sprintf("^%s$", emojiShortcode)) + + // emoji regex can be played with here: https://regex101.com/r/478XGM/1 + emojiFinderString = fmt.Sprintf(`(?:\B)?:(%s):(?:\B)?`, emojiShortcode) + // EmojiFinder extracts emoji strings from a piece of text. + EmojiFinder = regexp.MustCompile(emojiFinderString) + + // usernameString defines an acceptable username on this instance + usernameString = fmt.Sprintf(`[a-z0-9_]{2,%d}`, maximumUsernameLength) + // Username can be used to validate usernames of new signups + Username = regexp.MustCompile(fmt.Sprintf(`^%s$`, usernameString)) + + userPathString = fmt.Sprintf(`^?/%s/(%s)$`, users, usernameString) + // UserPath parses a path that validates and captures the username part from eg /users/example_username + UserPath = regexp.MustCompile(userPathString) + + publicKeyPath = fmt.Sprintf(`^?/%s/(%s)/%s`, users, usernameString, publicKey) + // PublicKeyPath parses a path that validates and captures the username part from eg /users/example_username/main-key + PublicKeyPath = regexp.MustCompile(publicKeyPath) + + inboxPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, inbox) + // InboxPath parses a path that validates and captures the username part from eg /users/example_username/inbox + InboxPath = regexp.MustCompile(inboxPath) + + outboxPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, outbox) + // OutboxPath parses a path that validates and captures the username part from eg /users/example_username/outbox + OutboxPath = regexp.MustCompile(outboxPath) + + actorPath = fmt.Sprintf(`^?/%s/(%s)$`, actors, usernameString) + // ActorPath parses a path that validates and captures the username part from eg /actors/example_username + ActorPath = regexp.MustCompile(actorPath) + + followersPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, followers) + // FollowersPath parses a path that validates and captures the username part from eg /users/example_username/followers + FollowersPath = regexp.MustCompile(followersPath) + + followingPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, following) + // FollowingPath parses a path that validates and captures the username part from eg /users/example_username/following + FollowingPath = regexp.MustCompile(followingPath) + + followPath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, follow, ulid) + // FollowPath parses a path that validates and captures the username part and the ulid part + // from eg /users/example_username/follow/01F7XT5JZW1WMVSW1KADS8PVDH + FollowPath = regexp.MustCompile(followPath) + + ulid = `[0123456789ABCDEFGHJKMNPQRSTVWXYZ]{26}` + // ULID parses and validate a ULID. + ULID = regexp.MustCompile(fmt.Sprintf(`^%s$`, ulid)) + + likedPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, liked) + // LikedPath parses a path that validates and captures the username part from eg /users/example_username/liked + LikedPath = regexp.MustCompile(likedPath) + + likePath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, liked, ulid) + // LikePath parses a path that validates and captures the username part and the ulid part + // from eg /users/example_username/like/01F7XT5JZW1WMVSW1KADS8PVDH + LikePath = regexp.MustCompile(likePath) + + statusesPath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, statuses, ulid) + // StatusesPath parses a path that validates and captures the username part and the ulid part + // from eg /users/example_username/statuses/01F7XT5JZW1WMVSW1KADS8PVDH + // The regex can be played with here: https://regex101.com/r/G9zuxQ/1 + StatusesPath = regexp.MustCompile(statusesPath) + + blockPath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, blocks, ulid) + // BlockPath parses a path that validates and captures the username part and the ulid part + // from eg /users/example_username/blocks/01F7XT5JZW1WMVSW1KADS8PVDH + BlockPath = regexp.MustCompile(blockPath) +) |