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https://github.com/superseriousbusiness/gotosocial
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moving stuff around
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tsmethurst
136
internal/regexes/regexes.go
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136
internal/regexes/regexes.go
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/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package regexes
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import (
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"fmt"
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"regexp"
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)
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const (
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users = "users"
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actors = "actors"
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statuses = "statuses"
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inbox = "inbox"
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outbox = "outbox"
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followers = "followers"
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following = "following"
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liked = "liked"
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collections = "collections"
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featured = "featured"
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publicKey = "main-key"
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follow = "follow"
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update = "updates"
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blocks = "blocks"
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)
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const (
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maximumUsernameLength = 64
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maximumEmojiShortcodeLength = 30
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maximumHashtagLength = 30
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)
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var (
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mentionName = `^@(\w+)(?:@([a-zA-Z0-9_\-\.:]+)?)$`
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// MentionName captures the username and domain part from a mention string
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// such as @whatever_user@example.org, returning whatever_user and example.org (without the @ symbols)
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MentionName = regexp.MustCompile(mentionName)
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// mention regex can be played around with here: https://regex101.com/r/qwM9D3/1
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mentionFinder = `(?:\B)(@\w+(?:@[a-zA-Z0-9_\-\.]+)?)(?:\B)?`
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// MentionFinder extracts mentions from a piece of text.
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MentionFinder = regexp.MustCompile(mentionFinder)
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// hashtag regex can be played with here: https://regex101.com/r/bPxeca/1
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hashtagFinder = fmt.Sprintf(`(?:^|\n|\s)(#[a-zA-Z0-9]{1,%d})(?:\b)`, maximumHashtagLength)
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// HashtagFinder finds possible hashtags in a string.
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// It returns just the string part of the hashtag, not the # symbol.
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HashtagFinder = regexp.MustCompile(hashtagFinder)
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emojiShortcode = fmt.Sprintf(`\w{2,%d}`, maximumEmojiShortcodeLength)
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// EmojiShortcode validates an emoji name.
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EmojiShortcode = regexp.MustCompile(fmt.Sprintf("^%s$", emojiShortcode))
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// emoji regex can be played with here: https://regex101.com/r/478XGM/1
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emojiFinderString = fmt.Sprintf(`(?:\B)?:(%s):(?:\B)?`, emojiShortcode)
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// EmojiFinder extracts emoji strings from a piece of text.
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EmojiFinder = regexp.MustCompile(emojiFinderString)
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// usernameString defines an acceptable username on this instance
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usernameString = fmt.Sprintf(`[a-z0-9_]{2,%d}`, maximumUsernameLength)
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// Username can be used to validate usernames of new signups
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Username = regexp.MustCompile(fmt.Sprintf(`^%s$`, usernameString))
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userPathString = fmt.Sprintf(`^?/%s/(%s)$`, users, usernameString)
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// UserPath parses a path that validates and captures the username part from eg /users/example_username
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UserPath = regexp.MustCompile(userPathString)
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publicKeyPath = fmt.Sprintf(`^?/%s/(%s)/%s`, users, usernameString, publicKey)
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// PublicKeyPath parses a path that validates and captures the username part from eg /users/example_username/main-key
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PublicKeyPath = regexp.MustCompile(publicKeyPath)
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inboxPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, inbox)
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// InboxPath parses a path that validates and captures the username part from eg /users/example_username/inbox
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InboxPath = regexp.MustCompile(inboxPath)
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outboxPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, outbox)
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// OutboxPath parses a path that validates and captures the username part from eg /users/example_username/outbox
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OutboxPath = regexp.MustCompile(outboxPath)
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actorPath = fmt.Sprintf(`^?/%s/(%s)$`, actors, usernameString)
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// ActorPath parses a path that validates and captures the username part from eg /actors/example_username
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ActorPath = regexp.MustCompile(actorPath)
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followersPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, followers)
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// FollowersPath parses a path that validates and captures the username part from eg /users/example_username/followers
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FollowersPath = regexp.MustCompile(followersPath)
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followingPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, following)
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// FollowingPath parses a path that validates and captures the username part from eg /users/example_username/following
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FollowingPath = regexp.MustCompile(followingPath)
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followPath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, follow, ulid)
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// FollowPath parses a path that validates and captures the username part and the ulid part
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// from eg /users/example_username/follow/01F7XT5JZW1WMVSW1KADS8PVDH
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FollowPath = regexp.MustCompile(followPath)
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ulid = `[0123456789ABCDEFGHJKMNPQRSTVWXYZ]{26}`
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// ULID parses and validate a ULID.
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ULID = regexp.MustCompile(fmt.Sprintf(`^%s$`, ulid))
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likedPath = fmt.Sprintf(`^/?%s/(%s)/%s$`, users, usernameString, liked)
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// LikedPath parses a path that validates and captures the username part from eg /users/example_username/liked
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LikedPath = regexp.MustCompile(likedPath)
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likePath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, liked, ulid)
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// LikePath parses a path that validates and captures the username part and the ulid part
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// from eg /users/example_username/like/01F7XT5JZW1WMVSW1KADS8PVDH
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LikePath = regexp.MustCompile(likePath)
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statusesPath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, statuses, ulid)
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// StatusesPath parses a path that validates and captures the username part and the ulid part
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// from eg /users/example_username/statuses/01F7XT5JZW1WMVSW1KADS8PVDH
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// The regex can be played with here: https://regex101.com/r/G9zuxQ/1
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StatusesPath = regexp.MustCompile(statusesPath)
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blockPath = fmt.Sprintf(`^/?%s/(%s)/%s/(%s)$`, users, usernameString, blocks, ulid)
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// BlockPath parses a path that validates and captures the username part and the ulid part
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// from eg /users/example_username/blocks/01F7XT5JZW1WMVSW1KADS8PVDH
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BlockPath = regexp.MustCompile(blockPath)
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)
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