| 1 | /// The site's own routes: first path segments that are never a workspace's, |
| 2 | /// so nobody may register them, and no alias can be reached at them. |
| 3 | const ROUTES: &[&str] = &[ |
| 4 | "api", |
| 5 | "mcp", |
| 6 | "login", |
| 7 | "logout", |
| 8 | "register", |
| 9 | "new", |
| 10 | "settings", |
| 11 | "search", |
| 12 | "admin", |
| 13 | "auth", |
| 14 | // g1t.sh/integrations/github/setup: where GitHub returns after an install. |
| 15 | "integrations", |
| 16 | "pulls", |
| 17 | "issues", |
| 18 | "oauth", |
| 19 | "assets", |
| 20 | "avatars", |
| 21 | "docs", |
| 22 | "explore", |
| 23 | "about", |
| 24 | "pricing", |
| 25 | "terms", |
| 26 | "privacy", |
| 27 | "policies", |
| 28 | "security", |
| 29 | "help", |
| 30 | "support", |
| 31 | "status", |
| 32 | "blog", |
| 33 | "verify", |
| 34 | "confirm-email", |
| 35 | "forgot", |
| 36 | "reset", |
| 37 | "device", |
| 38 | "workspaces", |
| 39 | "u", |
| 40 | // g1t.sh/invite/<code>: invite links; and the waitlist. |
| 41 | "invite", |
| 42 | "invites", |
| 43 | "waitlist", |
| 44 | // g1t.sh/invitations: the workspace invitations waiting for an answer. |
| 45 | "invitations", |
| 46 | // g1t.sh/v2/: the container registry; `-` paths hold the others. |
| 47 | "v2", |
| 48 | // g1t.sh/inbox, and the name it might also go by. |
| 49 | "inbox", |
| 50 | "notifications", |
| 51 | ]; |
| 52 | |
| 53 | /// g1t itself, the name its agent once went by, and `ghost`, who wrote what |
| 54 | /// a deleted account wrote (`account_deletion::GHOST_USERNAME`): everything |
| 55 | /// g1t does is shown as `g1t`, so nobody else may be called any of these. |
| 56 | /// Not routes: staff may point one at a workspace as an alias (identity's |
| 57 | /// `aliases.rs`). |
| 58 | const OWN: &[&str] = &["g1t", "g1t-agent", "ghost"]; |
| 59 | |
| 60 | /// Whether `value`, whatever its case, is a name nobody can register or |
| 61 | /// rename a workspace to: a route, or g1t's own. |
| 62 | pub fn is_reserved_name(value: &str) -> bool { |
| 63 | is_route_name(value) || OWN.iter().any(|own| own.eq_ignore_ascii_case(value.trim())) |
| 64 | } |
| 65 | |
| 66 | /// Whether `value`, whatever its case, is one of the site's own routes. |
| 67 | pub fn is_route_name(value: &str) -> bool { |
| 68 | let value = value.trim(); |
| 69 | ROUTES.iter().any(|route| route.eq_ignore_ascii_case(value)) |
| 70 | } |
| 71 | |
| 72 | /// Whether `value` has a namespace's shape: letters, digits and single |
| 73 | /// hyphens, not starting or ending with a hyphen, at most 39 characters. |
| 74 | /// Reserved names have it too; see [`is_valid_namespace`]. |
| 75 | pub fn is_namespace_shaped(value: &str) -> bool { |
| 76 | let bytes = value.as_bytes(); |
| 77 | !bytes.is_empty() |
| 78 | && bytes.len() <= 39 |
| 79 | && bytes |
| 80 | .iter() |
| 81 | .all(|byte| byte.is_ascii_lowercase() || byte.is_ascii_digit() || *byte == b'-') |
| 82 | && !value.starts_with('-') |
| 83 | && !value.ends_with('-') |
| 84 | && !value.contains("--") |
| 85 | } |
| 86 | |
| 87 | /// A workspace alias as staff typed it, trimmed and lowercased, if it can |
| 88 | /// be one: shaped like a namespace and not one of the site's routes, which |
| 89 | /// would always answer first. Reserved names such as `g1t` can be; whether |
| 90 | /// a person or workspace already has it is identity's to check. |
| 91 | pub fn aliasable_name(value: &str) -> Option<String> { |
| 92 | let value = value.trim().to_lowercase(); |
| 93 | (is_namespace_shaped(&value) && !is_route_name(&value)).then_some(value) |
| 94 | } |
| 95 | |
| 96 | /// A username or workspace slug as someone typed it, trimmed and |
| 97 | /// lowercased, if it can be registered: what signing up, signing up with |
| 98 | /// GitHub and creating a workspace each take. None when it is malformed or |
| 99 | /// reserved. |
| 100 | pub fn claimable_namespace(value: &str) -> Option<String> { |
| 101 | let value = value.trim().to_lowercase(); |
| 102 | is_valid_namespace(&value).then_some(value) |
| 103 | } |
| 104 | |
| 105 | /// A username as someone typed it, if it can be registered: the name |
| 106 | /// everything finds them by (`canonical`, lowercased: URLs, lookups, |
| 107 | /// mentions, git) and the name as they wrote it (`display`, trimmed, its |
| 108 | /// case kept). Letters of either case, digits and single hyphens, not |
| 109 | /// starting or ending with a hyphen, 1 to 39 characters, never reserved |
| 110 | /// in any case. ASCII only, so no other letter lowercases into one. |
| 111 | pub fn claimable_username(value: &str) -> Option<Username> { |
| 112 | let display = value.trim(); |
| 113 | if !display.is_ascii() { |
| 114 | return None; |
| 115 | } |
| 116 | let canonical = display.to_ascii_lowercase(); |
| 117 | is_valid_namespace(&canonical).then(|| Username { canonical, display: display.to_owned() }) |
| 118 | } |
| 119 | |
| 120 | /// A username in its two forms: see [`claimable_username`]. |
| 121 | #[derive(Clone, Debug, PartialEq, Eq)] |
| 122 | pub struct Username { |
| 123 | /// Lowercased: what it is stored, found, linked and mentioned by. |
| 124 | pub canonical: String, |
| 125 | /// As its owner chose to write it: what it is shown as. |
| 126 | pub display: String, |
| 127 | } |
| 128 | |
| 129 | impl Username { |
| 130 | /// The display form, when it differs from the canonical one: what is |
| 131 | /// kept beside it (`users.display_username`); none means the same. |
| 132 | pub fn display_if_cased(&self) -> Option<&str> { |
| 133 | (self.display != self.canonical).then_some(self.display.as_str()) |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /// Namespaces follow GitHub's rules: letters, digits and single hyphens, |
| 138 | /// not starting or ending with a hyphen, at most 39 characters. |
| 139 | pub fn is_valid_namespace(value: &str) -> bool { |
| 140 | is_namespace_shaped(value) && !is_reserved_name(value) |
| 141 | } |
| 142 | |
| 143 | pub fn is_valid_repo_name(value: &str) -> bool { |
| 144 | !value.is_empty() |
| 145 | && value.len() <= 100 |
| 146 | && value.bytes().all(|byte| { |
| 147 | byte.is_ascii_lowercase() || byte.is_ascii_digit() || matches!(byte, b'.' | b'_' | b'-') |
| 148 | }) |
| 149 | && !value.starts_with('.') |
| 150 | && !value.ends_with(".git") |
| 151 | // `/<workspace>/-/…` holds the workspace's own pages. |
| 152 | && value != "-" |
| 153 | } |
| 154 | |
| 155 | #[cfg(test)] |
| 156 | mod tests { |
| 157 | use super::*; |
| 158 | |
| 159 | #[test] |
| 160 | fn g1ts_own_names_are_reserved_in_any_case() { |
| 161 | for name in ["g1t", "G1T", "g1t-agent", "G1T-Agent", " g1t "] { |
| 162 | assert!(is_reserved_name(name), "{name}"); |
| 163 | assert_eq!(claimable_namespace(name), None, "{name}"); |
| 164 | } |
| 165 | assert!(!is_valid_namespace("g1t")); |
| 166 | assert!(!is_valid_namespace("g1t-agent")); |
| 167 | assert!(!is_valid_namespace("ghost")); |
| 168 | assert_eq!(claimable_namespace(" Ghost "), None); |
| 169 | } |
| 170 | |
| 171 | #[test] |
| 172 | fn names_near_g1ts_are_anyones() { |
| 173 | assert!(!is_reserved_name("g1t-agents")); |
| 174 | assert_eq!(claimable_namespace("G1T-Bot").as_deref(), Some("g1t-bot")); |
| 175 | assert_eq!(claimable_namespace(" Ana ").as_deref(), Some("ana")); |
| 176 | assert_eq!(claimable_namespace("an--a"), None); |
| 177 | } |
| 178 | |
| 179 | #[test] |
| 180 | fn usernames_keep_their_case_and_are_found_without_it() { |
| 181 | let name = claimable_username(" Octo-Cat ").unwrap(); |
| 182 | assert_eq!(name.canonical, "octo-cat"); |
| 183 | assert_eq!(name.display, "Octo-Cat"); |
| 184 | assert_eq!(name.display_if_cased(), Some("Octo-Cat")); |
| 185 | let plain = claimable_username("ana").unwrap(); |
| 186 | assert_eq!(plain.display_if_cased(), None); |
| 187 | assert_eq!(claimable_username("A").unwrap().canonical, "a"); |
| 188 | assert_eq!(claimable_username(&"Z".repeat(39)).unwrap().display.len(), 39); |
| 189 | } |
| 190 | |
| 191 | #[test] |
| 192 | fn usernames_follow_the_common_rules_in_any_case() { |
| 193 | let long = "a".repeat(40); |
| 194 | for bad in ["", " ", "-Ana", "Ana-", "An--a", "An_a", "Ana.B", "Ana B", long.as_str()] { |
| 195 | assert_eq!(claimable_username(bad), None, "{bad:?}"); |
| 196 | } |
| 197 | // Reserved whatever the case: routes and g1t's own. |
| 198 | for reserved in ["G1T", "G1t-Agent", "Ghost", "Settings", "API", "U"] { |
| 199 | assert_eq!(claimable_username(reserved), None, "{reserved}"); |
| 200 | } |
| 201 | // A letter that lowercases into ASCII is not one: the Kelvin sign is not K. |
| 202 | assert_eq!(claimable_username("\u{212A}elvin"), None); |
| 203 | assert_eq!(claimable_username("Ana\u{0301}"), None); |
| 204 | } |
| 205 | |
| 206 | #[test] |
| 207 | fn g1t_can_be_an_alias_but_a_route_cannot() { |
| 208 | assert_eq!(aliasable_name(" G1T ").as_deref(), Some("g1t")); |
| 209 | assert_eq!(aliasable_name("acme-corp").as_deref(), Some("acme-corp")); |
| 210 | for name in ["settings", "api", "login", "Explore", "-acme", "ac--me", "acme_inc", "", "a.b"] { |
| 211 | assert_eq!(aliasable_name(name), None, "{name}"); |
| 212 | } |
| 213 | assert_eq!(aliasable_name(&"a".repeat(40)), None); |
| 214 | // Still nobody's to register. |
| 215 | assert!(is_reserved_name("g1t") && !is_route_name("g1t")); |
| 216 | } |
| 217 | } |