╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ ui.zig ───────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭7fcb7c5a..╮ 7fcb7c5a.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (647) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯
.. embed/ event/ test/ ui/ command.zig diff3.zig event.zig find.zig fork.zig lib.zig main.zig main_wasm.zig markdown.zig patch.zig progress.zig push.zig search.zig search_commit.zig search_thread.zig serve.zig serve_common.zig serve_http.zig serve_ssh.zig serve_ssh_protocol.zig test.zig testnet.zig try.zig ╭─────────────────────────────────╮ │ui.zig │ ╰─────────────────────────────────╯ web.zig
1921 ref_or_oid = .object; 1922 value = o; 1923 }, 1924 } else |_| {} 1925 } 1926 1927 var oid: [hex_len]u8 = undefined; 1928 switch (ref_or_oid) { 1929 .object => { 1930 if (value.len != hex_len) return null; 1931 @memcpy(&oid, value); 1932 }, 1933 .branch, .tag => { 1934 const ref_kind: rf.RefKind = if (ref_or_oid == .branch) .head else .tag; 1935 oid = (repo.readRef(io, .{ .kind = ref_kind, .name = value }) catch null) orelse return null; 1936 }, 1937 } 1938 // store url-encoded so the route layer can hold the value verbatim. 1939 return .{ .ref_or_oid = ref_or_oid, .value = try urlEncodeRef(aa, value), .oid = oid }; 1940 } 1941 }; 1942 } 1943 1944 // who a repo page is built for, which picks the actions it shows 1945 pub const Viewer = struct { 1946 role: evt.Repo.Role, 1947 email: []const u8, 1948 1949 // the session's viewer of a repo it holds `role` in, or null when logged 1950 // out. local mode owns everything. 1951 pub fn init(session: *Session, arena: *std.heap.ArenaAllocator, role: evt.Repo.Role) !?Viewer { 1952 if (session.data.host_kind == .local) return .{ .role = .owner, .email = "" }; 1953 const user_id = session.userId() orelse return null; 1954 const moment = session.haxy_moment orelse unreachable; 1955 const user = (try activeUser(moment, arena, user_id)) orelse return null; 1956 return .{ .role = role, .email = user.event.email }; 1957 } 1958 }; 1959 1960 // a repo a page shows, and what its viewer may do there 1961 pub const RepoHandle = struct { 1962 location: RoutablePage.RepoLocation, 1963 viewer: ?Viewer = null, 1964 1965 pub fn dupe(self: RepoHandle, allocator: std.mem.Allocator) !RepoHandle { 1966 var copy = self; 1967 copy.location = try self.location.dupe(allocator); 1968 return copy; 1969 } 1970 1971 // pushing, and seeing the events and undo tabs. local mode is always owner. 1972 pub fn canWrite(self: RepoHandle) bool { 1973 const viewer = self.viewer orelse return false; 1974 return viewer.role.atLeast(.write); 1975 } 1976 1977 pub fn canUndo(self: RepoHandle) bool { 1978 const viewer = self.viewer orelse return false; 1979 return viewer.role == .owner; 1980 } 1981 }; 1982 1983 // where a repo page reads its on-disk repo from 1984 pub const RepoSource = struct { 1985 path: []const u8, 1986 repo_kind: rp.RepoKind, 1987 // the user's global git config, so local mode picks up their identity and 1988 // their signing and ssh settings. null on the server paths, which must not 1989 // read whoever runs the server. 1990 global_config_path: ?[]const u8 = null, 1991 1992 pub fn localInitOpts(self: RepoSource) rp.InitOpts { 1993 return .{ .path = self.path, .global_config_path = self.global_config_path }; 1994 } 1995 1996 pub fn hasBranch(self: RepoSource, io: std.Io, allocator: std.mem.Allocator, branch: []const u8) !bool { 1997 if (!xit.ref.validateName(branch)) return false; 1998 return switch (self.repo_kind) { 1999 inline else => |repo_kind| blk: { 2000 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, self.localInitOpts()); 2001 defer any_repo.deinit(io, allocator); 2002 break :blk switch (any_repo) { 2003 inline else => |*repo| (try repo.readRef(io, .{ .kind = .head, .name = branch })) != null, 2004 }; 2005 }, 2006 }; 2007 } 2008 2009 // whether the actor may change the event `id` names 2010 pub fn canModify( 2011 self: RepoSource, 2012 io: std.Io, 2013 allocator: std.mem.Allocator, 2014 actor: Actor, 2015 kind: evt.EventKind, 2016 id: *const [evt.event_id_size]u8, 2017 ) !bool { 2018 // a role that may change an event with no author needs no read 2019 if (actor.role.canModify(actor.author.email, null)) return true; 2020 2021 var arena = std.heap.ArenaAllocator.init(allocator); 2022 defer arena.deinit(); 2023 return switch (self.repo_kind) { 2024 inline else => |repo_kind| blk: { 2025 var any_repo = try rp.AnyRepo(repo_kind, .{}).open(io, allocator, self.localInitOpts()); 2026 defer any_repo.deinit(io, allocator); 2027 break :blk switch (any_repo) { 2028 inline else => |*repo| actor.role.canModify(actor.author.email, try evt.readAuthorEmail(repo_kind, repo.self_repo_opts, io, allocator, &arena, repo, kind, id)), 2029 }; 2030 }, 2031 }; 2032 } 2033 }; 2034 2035 // who a write acts as and the role they hold in its repo 2036 pub const Actor = struct { 2037 author: evt.CommitAuthor, 2038 // local mode has no accounts, so it has no user id 2039 user_id: ?[evt.event_id_size]u8 = null, 2040 role: evt.Repo.Role, 2041 // the repo owner's id, which local mode lacks 2042 repo_user_id: ?[evt.event_id_size]u8 = null, 2043 }; 2044 2045 pub const Authorization = union(enum) { 2046 actor: Actor, 2047 login_required, 2048 repo_not_found, 2049 forbidden, 2050 }; 2051 2052 // the account `user_id` names, or null once it has been removed. a user id is 2053 // checked here wherever one enters, so the role lookups can trust theirs. 2054 pub fn activeUser( 2055 moment: evt.AdminDB.HashMap(.read_only), 2056 arena: *std.heap.ArenaAllocator, 2057 user_id: [evt.event_id_size]u8, 2058 ) !?evt.User.Record { 2059 const user = (try evt.User.readById(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, &user_id)) orelse return null; 2060 return if (user.removed) null else user; 2061 } 2062 2063 // whether the user may write to the repo `identity` names with at least 2064 // `min_role`, and to the `thread_kind` tab when there is one 2065 pub fn authorizeUser( 2066 io: std.Io, 2067 moment: evt.AdminDB.HashMap(.read_only), 2068 arena: *std.heap.ArenaAllocator, 2069 users_dir: []const u8, 2070 user_id: [evt.event_id_size]u8, 2071 identity: []const u8, 2072 min_role: evt.Repo.Role, 2073 thread_kind: ?evt.EventKind, 2074 ) !Authorization { 2075 const user = (try activeUser(moment, arena, user_id)) orelse return .login_required; 2076 2077 const owner_repo = evt.parseOwnerRepoPath(identity) orelse return .repo_not_found; 2078 const repo = (try evt.readRepoByOwnerAndName(io, arena.child_allocator, arena, moment, users_dir, owner_repo.owner, owner_repo.name, user_id)) orelse return .repo_not_found; 2079 // a repo the user can't read doesn't exist to them 2080 const role = repo.role orelse return .repo_not_found; 2081 if (!role.atLeast(min_role)) return .forbidden; 2082 if (thread_kind) |kind| { 2083 // a tab that is off doesn't exist 2084 const tab_role = repo.repo.event.threadRole(kind) orelse return .repo_not_found; 2085 if (!role.atLeast(tab_role)) return .forbidden; 2086 } 2087 return .{ .actor = .{ 2088 .author = .{ .name = user.event.name, .email = user.event.email }, 2089 .user_id = user_id, 2090 .role = role, 2091 .repo_user_id = repo.repo.event.user_id[0..evt.event_id_size].*, 2092 } }; 2093 } 2094 2095 // events created in local mode have no account behind them, so the commit 2096 // author comes from the repo's config, which the global config feeds into. 2097 pub const local_author_fallback = evt.CommitAuthor{ .name = "haxy", .email = "user@haxy" }; 2098 2099 pub fn localAuthor( 2100 src: RepoSource, 2101 io: std.Io, 2102 allocator: std.mem.Allocator, 2103 arena: *std.heap.ArenaAllocator, 2104 ) !evt.CommitAuthor { 2105 switch (src.repo_kind) { 2106 inline else => |repo_kind| { 2107 var any_repo = rp.AnyRepo(repo_kind, .{}).open(io, allocator, src.localInitOpts()) catch return local_author_fallback; 2108 defer any_repo.deinit(io, allocator); 2109 2110 switch (any_repo) { 2111 inline else => |*repo| { 2112 var config = try repo.listConfig(io, allocator); 2113 defer config.deinit(); 2114 2115 const user = config.sections.get("user") orelse return local_author_fallback; 2116 const name = user.get("name") orelse return local_author_fallback; 2117 const email = user.get("email") orelse return local_author_fallback; 2118 return .{ 2119 .name = try arena.allocator().dupe(u8, name), 2120 .email = try arena.allocator().dupe(u8, email), 2121 }; 2122 }, 2123 } 2124 }, 2125 } 2126 } 2127 2128 // per-connection mutable state. each SSH session / web session / local TUI 2129 // run gets its own. 2130 pub const Session = struct { 2131 data: Data = .{}, 2132 // session-lifetime allocations: login/user_id, persisted prefs, queued 2133 // actions. lives as long as the connection. 2134 arena: *std.heap.ArenaAllocator, 2135 // current page's allocations: page data and the page-scoped strings widgets 2136 // build (form actions, links). owned by Nav, swapped on each navigation, so 2137 // it doesn't accumulate over a long-lived session. on the web/wasm paths, 2138 // where a render is one-shot, this points at the same arena as `arena`. 2139 page_arena: *std.heap.ArenaAllocator, 2140 haxy_moment: ?evt.AdminDB.HashMap(.read_only) = null, // db cursor (null on the wasm side) 2141 // filesystem io and the path to <server>/repos, for opening on-disk repos 2142 // during page construction. both null on wasm, which has no filesystem and 2143 // rebuilds pages from the serialized snapshot rather than from disk. 2144 io: ?std.Io = null, 2145 admin_repo: ?*rp.Repo(.xit, evt.admin_repo_opts) = null, 2146 users_dir: ?[]const u8 = null, 2147 // the single on-disk repo this session views, when running in local mode 2148 // (haxy invoked with no arguments inside a repo). null on the server paths, 2149 // which resolve repos from the admin db instead. 2150 local: ?RepoSource = null, 2151 // focus id -> the live TextInput, refreshed each frame by the views that own 2152 // inputs. web/wasm form handling looks widgets up here by focus id. 2153 text_inputs: std.AutoHashMapUnmanaged(usize, *wgt.TextInput) = .empty, 2154 back: enum { unavailable, available, requested } = .unavailable, 2155 refresh_requested: bool = false, // set by input (ctrl+r) 2156 // a requested forward navigation. set this (via navigate) to move to a new 2157 // page; Nav.sync builds it and then copies it into current_page, clearing 2158 // this back to null. setting current_page directly only updates the url and 2159 // does not navigate. 2160 next_page: ?RoutablePage = null, 2161 is_terminal: bool = false, // true on remote SSH and local TUI 2162 color: bool = true, // false when NO_COLOR is set, which also hides the art 2163 // the terminal's reported default background, which the art blends toward 2164 terminal_background: ?Grid.Color.Rgb = null, 2165 // port the web UI is served on, for the TUI/SSH footer's "http://localhost:<port>..." 2166 // url. null on the web itself (no footer there). 2167 web_port: ?u16 = null, 2168 // a host operation requested by a widget 2169 host_request: ?HostRequest = null, 2170 quit_requested: bool = false, 2171 2172 pub const HostRequest = union(enum) { 2173 show_copyable_text: []const u8, 2174 sync_events, 2175 undo: RoutablePage.RepoUndoRoute, 2176 }; 2177 2178 pub const FormFeedback = union(enum) { 2179 pub const LoginFailure = enum { unknown_user, wrong_password }; 2180 pub const ThreadFailure = enum { required_title }; 2181 pub const PatchFailure = enum { 2182 required_title, 2183 invalid_target_branch, 2184 invalid_source_branch, 2185 same_branch, 2186 unrelated_branches, 2187 2188 pub fn fromError(err: anyerror) ?PatchFailure { 2189 return switch (err) { 2190 error.InvalidTargetBranch => .invalid_target_branch, 2191 error.InvalidSourceBranch => .invalid_source_branch, 2192 error.SameBranch => .same_branch, 2193 error.UnrelatedBranches => .unrelated_branches, 2194 else => null, 2195 }; 2196 } 2197 }; 2198 2199 pub const RepoFailure = enum { 2200 required_name, 2201 invalid_name, 2202 name_taken, 2203 2204 pub fn fromError(err: anyerror) ?RepoFailure { 2205 return switch (err) { 2206 error.NameEmpty => .required_name, 2207 error.NameTooLong, error.InvalidName => .invalid_name, 2208 error.NameTaken => .name_taken, 2209 else => null, 2210 }; 2211 } 2212 }; 2213 2214 pub const UserFailure = enum { 2215 required_name, 2216 invalid_name, 2217 name_taken, 2218 required_email, 2219 email_taken, 2220 required_password, 2221 password_mismatch, 2222 2223 pub fn fromError(err: anyerror) ?UserFailure { 2224 return switch (err) { 2225 error.NameEmpty => .required_name, 2226 error.NameTooShort, error.NameTooLong, error.InvalidName => .invalid_name, 2227 error.NameTaken => .name_taken, 2228 error.EmailEmpty => .required_email, 2229 error.EmailTaken => .email_taken, 2230 error.PasswordEmpty => .required_password, 2231 error.PasswordMismatch => .password_mismatch, 2232 else => null, 2233 }; 2234 } 2235 }; 2236 2237 login: struct { 2238 failure: LoginFailure, 2239 username: []const u8, 2240 }, 2241 user: struct { 2242 failure: UserFailure, 2243 // passwords are never retained 2244 fields: struct { 2245 name: []const u8, 2246 email: []const u8, 2247 }, 2248 }, 2249 repo: struct { 2250 failure: RepoFailure, 2251 fields: struct { 2252 name: []const u8, 2253 description: []const u8, 2254 hash: hash.HashKind, 2255 access: evt.Repo.Access, 2256 }, 2257 }, 2258 repo_settings: struct { 2259 failure: RepoFailure, 2260 fields: struct { 2261 name: []const u8, 2262 description: []const u8, 2263 access: evt.Repo.Access, 2264 discuss_role: ?evt.Repo.Role, 2265 issue_role: ?evt.Repo.Role, 2266 patch_role: ?evt.Repo.Role, 2267 }, 2268 }, 2269 issue: struct { 2270 failure: ThreadFailure, 2271 fields: ?struct { 2272 title: []const u8, 2273 labels: []const u8, 2274 description: []const u8, 2275 } = null, 2276 }, 2277 patch: struct { 2278 failure: PatchFailure, 2279 fields: ?struct { 2280 title: []const u8, 2281 labels: []const u8, 2282 description: []const u8, 2283 target_branch: []const u8, 2284 source_branch: []const u8 = "", 2285 source_kind: Repo.Patches.Source.Kind = .fork, 2286 } = null, 2287 }, 2288 discussion: struct { 2289 failure: ThreadFailure, 2290 fields: ?struct { 2291 title: []const u8, 2292 labels: []const u8, 2293 description: []const u8, 2294 } = null, 2295 }, 2296 }; 2297 2298 const Self = @This(); 2299 2300 // serializable data sent down to web client 2301 pub const Data = struct { 2302 user_id: ?[]const u8 = null, 2303 // the logged-in user's name, for the views that show it 2304 user_name: ?[]const u8 = null, 2305 // a failed form retained long enough to render it for correction 2306 form_feedback: ?FormFeedback = null, 2307 // a transient local event-sync error 2308 sync_failure: ?[]const u8 = null, 2309 // a failed terminal undo retained on the current tab 2310 undo_failure: ?[]const u8 = null, 2311 current_page: RoutablePage = .default, 2312 // the selected ANSI art. the server serializes one image for WASM so 2313 // the browser does not need the whole build-generated collection. 2314 ansi_art: []const u8 = "", 2315 // the bound git-service ports. absent in local mode, where remote urls 2316 // are not shown. 2317 git_http_port: ?u16 = null, 2318 git_ssh_port: ?u16 = null, 2319 git_ssh_prefix: []const u8 = "", 2320 // whether this session views a local repo or the server. unlike `local` 2321 // (the host-side filesystem source) this travels in the snapshot, so 2322 // the wasm side also parses elided link urls and hides the multi-user 2323 // chrome. 2324 host_kind: evt.HostKind = .server, 2325 }; 2326 2327 pub fn init( 2328 arena: *std.heap.ArenaAllocator, 2329 repo: *rp.Repo(.xit, evt.admin_repo_opts), 2330 data: Data, 2331 ) !Self { 2332 var session = Self{ 2333 .data = data, 2334 .arena = arena, 2335 // until a host swaps in a page-scoped arena (Nav does this), page 2336 // allocations land in the session arena. on the web path that's the 2337 // intended behavior, since the whole arena is per-request. 2338 .page_arena = arena, 2339 .admin_repo = repo, 2340 .haxy_moment = try evt.currentMoment(evt.admin_repo_opts, repo), 2341 }; 2342 try session.loadUser(); 2343 return session; 2344 } 2345 2346 // load the logged-in user's name and persisted preferences from the db 2347 pub fn loadUser(self: *Self) !void { 2348 const user_id = self.userId() orelse return; 2349 const moment = self.haxy_moment orelse return; 2350 const user = (try activeUser(moment, self.arena, user_id)) orelse return self.logOut(); 2351 self.data.user_name = user.event.name; 2352 } 2353 2354 // forget the logged-in user, on a logout or once their account is removed 2355 pub fn logOut(self: *Self) void { 2356 self.data.user_id = null; 2357 self.data.user_name = null; 2358 } 2359 2360 pub fn userId(self: *const Self) ?[evt.event_id_size]u8 { 2361 const bytes = self.data.user_id orelse return null; 2362 if (bytes.len != evt.event_id_size) return null; 2363 var id: [evt.event_id_size]u8 = undefined; 2364 @memcpy(&id, bytes); 2365 return id; 2366 } 2367 2368 pub fn formFeedback(self: *const Self, comptime tag: std.meta.Tag(FormFeedback)) ?@FieldType(FormFeedback, @tagName(tag)) { 2369 const feedback = self.data.form_feedback orelse return null; 2370 if (std.meta.activeTag(feedback) != tag) return null; 2371 return @field(feedback, @tagName(tag)); 2372 } 2373 2374 pub fn clearFormFeedback(self: *Self) void { 2375 self.data.form_feedback = null; 2376 } 2377 2378 // the actor for a write to the repo `identity` names, or null when the 2379 // session may not write there with at least `min_role` or in the 2380 // `thread_kind` tab. local mode always writes. 2381 pub fn authorize(self: *Self, identity: []const u8, min_role: evt.Repo.Role, thread_kind: ?evt.EventKind) !?Actor { 2382 if (self.data.host_kind == .local) { 2383 const author = blk: { 2384 const src = self.local orelse break :blk local_author_fallback; 2385 const io = self.io orelse break :blk local_author_fallback; 2386 break :blk try localAuthor(src, io, self.page_arena.child_allocator, self.page_arena); 2387 }; 2388 return .{ .author = author, .role = .owner }; 2389 } 2390 const user_id = self.userId() orelse return null; 2391 // the session's moment predates this input, so read the roles afresh 2392 const admin_repo = self.admin_repo orelse return null; 2393 const io = self.io orelse return null; 2394 const users_dir = self.users_dir orelse return null; 2395 const moment = try evt.currentMoment(evt.admin_repo_opts, admin_repo); 2396 return switch (try authorizeUser(io, moment, self.page_arena, users_dir, user_id, identity, min_role, thread_kind)) { 2397 .actor => |actor| actor, 2398 .login_required, .repo_not_found, .forbidden => null, 2399 }; 2400 } 2401 2402 // where this session's event writes go. a server session always has a users dir 2403 pub fn eventHost(self: *const Self) evt.Host { 2404 return switch (self.data.host_kind) { 2405 .local => .local, 2406 .server => .{ .server = .{ .users_dir = self.users_dir orelse unreachable } }, 2407 }; 2408 } 2409 2410 // reload the moment from the admin repo and log out a removed user 2411 pub fn reloadMoment(self: *Self, allocator: std.mem.Allocator, repo: *rp.Repo(.xit, evt.admin_repo_opts)) !void { 2412 const moment = try evt.currentMoment(evt.admin_repo_opts, repo); 2413 self.haxy_moment = moment; 2414 2415 const user_id = self.userId() orelse return; 2416 var arena = std.heap.ArenaAllocator.init(allocator); 2417 defer arena.deinit(); 2418 if (try activeUser(moment, &arena, user_id) == null) self.logOut(); 2419 } 2420 2421 // request a forward navigation to `route`; the host consumes next_page 2422 // (Nav.sync on the terminal, the wasm tick on the web). 2423 pub fn navigate(self: *Session, route: RoutablePage) !void { 2424 self.clearFormFeedback(); 2425 self.next_page = route; 2426 } 2427 }; 2428 2429 pub fn run(io: std.Io, allocator: std.mem.Allocator, session: *Session, repo_maybe: ?*rp.Repo(.xit, evt.admin_repo_opts)) !void { 2430 var nav = try Nav.init(allocator, session); 2431 defer nav.deinit(allocator); 2432 2433 var terminal = try term.Terminal.init(io, allocator); 2434 terminal.render_state.no_color = !session.color; 2435 var terminal_live = true; 2436 defer if (terminal_live) terminal.deinit(io); 2437 2438 // set term as active so it will be properly cooked 2439 // when a panic/segfault happens 2440 term.setActive(&terminal); 2441 defer term.setActive(null); 2442 2443 try terminal.queryBackground(); 2444 2445 while (!terminal.shouldQuit()) { 2446 const grid_changed = try terminal.render(&nav.root); 2447 2448 // process any inputs. 2449 // 2450 // if the grid didn't change, then first do a blocking 2451 // read, so the thread will sleep until further input. 2452 // after that, all remaining reads are non-blocking so 2453 // we can process the rest of the queued inputs. 2454 // 2455 // if the grid *did* change, then only do non-blocking 2456 // reads. we do not want to sleep the thread because 2457 // there may be an animation that requires more looping. 2458 var blocking = !grid_changed; 2459 while (try terminal.readKey(io, blocking)) |key| { 2460 blocking = false; 2461 try inputKey(allocator, &nav.root, key, session); 2462 } 2463 2464 if (session.host_request) |request| { 2465 session.host_request = null; 2466 switch (request) { 2467 .show_copyable_text => |copyable_text| { 2468 term.setActive(null); 2469 terminal.deinit(io); 2470 terminal_live = false; 2471 showCopyableText(io, copyable_text) catch |show_err| { 2472 terminal = try term.Terminal.init(io, allocator); 2473 terminal_live = true; 2474 term.setActive(&terminal); 2475 return show_err; 2476 }; 2477 terminal = try term.Terminal.init(io, allocator); 2478 terminal.render_state.no_color = !session.color; 2479 terminal_live = true; 2480 term.setActive(&terminal); 2481 }, 2482 .undo => |target| Repo.Undo.handleRequest(allocator, session, target), 2483 .sync_events => { 2484 try nav.root.build(allocator, .{ 2485 .min_size = .{ .width = null, .height = null }, 2486 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2487 }, nav.root.getFocus()); 2488 _ = try terminal.render(&nav.root); 2489 try Repo.Events.performSync(allocator, session); 2490 }, 2491 } 2492 } 2493 2494 // reload so the next navigation builds its page from the current moment 2495 if (repo_maybe) |repo| try session.reloadMoment(allocator, repo); 2496 2497 // reconcile navigation: forward to a new page, or back on escape. 2498 // the terminal background can change at any time, so recheck it on each page 2499 if (try nav.sync(allocator, session)) try terminal.queryBackground(); 2500 2501 // the quit button (on the quit tab) asks the host to tear down. 2502 if (session.quit_requested) terminal.requestQuit(); 2503 2504 try nav.root.build(allocator, .{ 2505 .min_size = .{ .width = null, .height = null }, 2506 .max_size = .{ .width = terminal.size.width, .height = terminal.size.height }, 2507 }, nav.root.getFocus()); 2508 } 2509 } 2510 2511 fn showCopyableText(io: std.Io, copyable_text: []const u8) !void { 2512 const tty: ?std.Io.File = if (builtin.target.os.tag == .windows) 2513 null 2514 else 2515 try std.Io.Dir.cwd().openFile(io, "/dev/tty", .{ .mode = .read_write }); 2516 defer if (tty) |file| file.close(io); 2517 2518 const input = if (tty) |file| file else std.Io.File.stdin(); 2519 const output = if (tty) |file| file else std.Io.File.stdout(); 2520 2521 var write_buf: [1024]u8 = undefined; 2522 var writer = output.writer(io, &write_buf); 2523 try writer.interface.print("\x1b[2J\x1b[Hcopy the following text and then press enter to go back:\r\n\r\n{s}\r\n", .{copyable_text}); 2524 try writer.interface.flush(); 2525 2526 var read_buf: [1]u8 = undefined; 2527 var reader = input.reader(io, &read_buf); 2528 while (true) { 2529 const byte = try reader.interface.takeByte(); 2530 if (byte == '\r' or byte == '\n') return; 2531 } 2532 } 2533 2534 pub fn inputKey(allocator: std.mem.Allocator, root: *Widget, key: Key, session: *Session) !void { 2535 const root_focus = root.getFocus(); 2536 const focused_before = root_focus.grandchild_id; 2537 var activate_in_page_link = false; 2538 switch (key) { 2539 // request a navigation pop; the host's Nav.sync goes back a page, or 2540 // quits when there's no history left. 2541 .escape => { 2542 session.back = .requested; 2543 return; 2544 }, 2545 .ctrl => |letter| switch (letter) { 2546 'r' => { 2547 session.refresh_requested = true; 2548 return; 2549 }, 2550 else => try root.input(allocator, key, root_focus), 2551 }, 2552 .enter => { 2553 if (root_focus.grandchild_id) |gid| { 2554 // follow a cross-page link 2555 if (crossPageLink(root_focus, gid, session.data)) |route| { 2556 return session.navigate(route); 2557 } 2558 if (rawLink(root_focus, gid)) |url| return requestRawLink(session, url); 2559 } 2560 activate_in_page_link = true; 2561 try root.input(allocator, key, root_focus); 2562 }, 2563 .mouse => |mouse| { 2564 if (mouse.action == .press and mouse.action.press == .left) { 2565 if (cellPageLink(root, mouse.x, mouse.y, session.data)) |route| return session.navigate(route); 2566 if (root_focus.hitTest(mouse.x, mouse.y)) |hit| { 2567 const focus_id = hit.id; 2568 if (hit.kind == .background) { 2569 root_focus.setFocus(focus_id); 2570 return; 2571 } 2572 if (widget.isBackButton((root_focus.children.get(focus_id) orelse return).focus)) { 2573 if (session.back == .available) session.back = .requested; 2574 return; 2575 } 2576 // follow a cross-page link 2577 if (crossPageLink(root_focus, focus_id, session.data)) |route| { 2578 return session.navigate(route); 2579 } 2580 if (currentPageLink(root_focus, focus_id, session.data)) return; 2581 if (rawLink(root_focus, focus_id)) |url| { 2582 if (!mouse.ctrl) try requestRawLink(session, url); 2583 return; 2584 } 2585 root_focus.setFocus(focus_id); 2586 activate_in_page_link = true; 2587 } 2588 // forward the press into the widget tree so buttons (and any 2589 // future click-aware widgets) can react. widgets that don't 2590 // care about presses ignore it. 2591 try root.input(allocator, key, root_focus); 2592 } else { 2593 try root.input(allocator, key, root_focus); 2594 } 2595 }, 2596 .event => |event| switch (event) { 2597 .background => |rgb| session.terminal_background = rgb, 2598 .resize => try root.input(allocator, key, root_focus), 2599 }, 2600 else => try root.input(allocator, key, root_focus), 2601 } 2602 2603 const focused_after = root_focus.grandchild_id; 2604 if (!activate_in_page_link and focused_before == focused_after) return; 2605 const focus_id = focused_after orelse return; 2606 if (inPageLink(root_focus, focus_id, session.data)) |route| session.data.current_page = route; 2607 } 2608 2609 // a link to bytes the server serves directly rather than to a page route, so 2610 // it never resolves to a RoutablePage 2611 pub const raw_link_prefix = "ax:"; 2612 2613 // a route already loaded into the current page; focusing it changes the url 2614 // without rebuilding the page 2615 pub const in_page_link_prefix = "ai:"; 2616 2617 // an in-page tab's base route, or the exact current route when it is selected 2618 pub fn inPageTabLink(session: *Session, route: RoutablePage, selected: bool) ![]const u8 { 2619 const target = if (selected) session.data.current_page else route; 2620 return session.page_arena.allocator().print("{s}{s}", .{ in_page_link_prefix, try target.toUrl(session.page_arena) }); 2621 } 2622 2623 // a button the web renderer covers with a file picker that posts the chosen 2624 // file to the url after the prefix 2625 pub const file_input_prefix = "file:"; 2626 2627 // a submit button that overrides its enclosing form's action 2628 pub const submit_action_prefix = "submit:"; 2629 2630 // one option of a radio field, as `radio:<name>=<value>` 2631 pub const radio_prefix = "radio:"; 2632 2633 // the url an `ax:` link points at, or null for anything else. a host that 2634 // suppresses the anchor's own navigation needs this to follow the link. 2635 pub fn rawLink(root_focus: *Focus, focus_id: usize) ?[]const u8 { 2636 const child = root_focus.children.get(focus_id) orelse return null; 2637 const custom = switch (child.focus.kind) { 2638 .custom => |c| c, 2639 else => return null, 2640 }; 2641 if (!std.mem.startsWith(u8, custom, raw_link_prefix)) return null; 2642 return custom[raw_link_prefix.len..]; 2643 } 2644 2645 fn requestRawLink(session: *Session, url: []const u8) !void { 2646 session.host_request = .{ .show_copyable_text = try terminalWebUrl(session.page_arena.allocator(), session, url) }; 2647 } 2648 2649 pub fn terminalWebUrl(allocator: std.mem.Allocator, session: *const Session, path: []const u8) ![]const u8 { 2650 // an absolute url is already complete 2651 if (!std.mem.startsWith(u8, path, "/")) return path; 2652 return if (session.web_port) |port| 2653 try allocator.print("http://localhost:{d}{s}", .{ port, path }) 2654 else 2655 path; 2656 } 2657 2658 // if the focus target at focus_id is an `a:` link that should navigate (a 2659 // different parent page, or a different files directory within the repo page), 2660 // return its route; otherwise null. lets a host turn a click / enter on such a 2661 // link into a navigation rather than a focus change. 2662 pub fn crossPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2663 const current = data.current_page; 2664 const route = pageLink(root_focus, focus_id, data, "a:") orelse return null; 2665 // a link to a different parent page always navigates; within a page, a 2666 // files-directory / commits-page / list-window change navigates while tab 2667 // links stay in-page. 2668 if (route.parent() != current.parent() or RoutablePage.repoPageChanged(route, current) or RoutablePage.forkPageChanged(route, current) or RoutablePage.homePageChanged(route, current) or RoutablePage.userPageChanged(route, current)) return route; 2669 return null; 2670 } 2671 2672 // the page the clicked cell links to, from a link inside a text box's content 2673 fn cellPageLink(root: *Widget, x: usize, y: usize, data: Session.Data) ?RoutablePage { 2674 const grid = root.getGrid() orelse return null; 2675 const cell = grid.cell(x, y) catch return null; 2676 const link = cell.link orelse return null; 2677 if (link.len == 0 or link[0] != '/') return null; 2678 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(link) else RoutablePage.fromUrl(link); 2679 } 2680 2681 // whether the `a:` focus target links to the page already shown, which a click 2682 // leaves alone rather than focusing 2683 pub fn currentPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) bool { 2684 const route = pageLink(root_focus, focus_id, data, "a:") orelse return false; 2685 return route.eql(data.current_page); 2686 } 2687 2688 // the route carried by an `ai:` focus target, or null for any other target 2689 pub fn inPageLink(root_focus: *Focus, focus_id: usize, data: Session.Data) ?RoutablePage { 2690 return pageLink(root_focus, focus_id, data, in_page_link_prefix); 2691 } 2692 2693 fn pageLink(root_focus: *Focus, focus_id: usize, data: Session.Data, prefix: []const u8) ?RoutablePage { 2694 const child = root_focus.children.get(focus_id) orelse return null; 2695 const custom = switch (child.focus.kind) { 2696 .custom => |c| c, 2697 else => return null, 2698 }; 2699 if (!std.mem.startsWith(u8, custom, prefix)) return null; 2700 const path = custom[prefix.len..]; 2701 // local sessions build (and parse) links with the repo identity elided 2702 return if (data.host_kind == .local) RoutablePage.fromUrlLocal(path) else RoutablePage.fromUrl(path); 2703 } 2704 2705 // a display author, resolved against the admin db at read time 2706 pub const Author = union(enum) { 2707 unknown, 2708 email: []const u8, // an email no user matches 2709 user_name: []const u8, 2710 2711 // the commit author line's email, resolved like initFromEmail 2712 pub fn init( 2713 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2714 arena: *std.heap.ArenaAllocator, 2715 author_line: []const u8, 2716 ) !Author { 2717 return initFromEmail(haxy_moment, arena, evt.authorEmail(author_line)); 2718 } 2719 2720 // from a record's stored author email: it resolves to the user currently 2721 // holding it, else stays the email. the result is allocated in `arena`, 2722 // so the email may borrow transient memory. 2723 pub fn initFromEmail( 2724 haxy_moment: ?evt.AdminDB.HashMap(.read_only), 2725 arena: *std.heap.ArenaAllocator, 2726 author_email: ?[]const u8, 2727 ) !Author { 2728 const email = author_email orelse return .unknown; 2729 if (haxy_moment) |moment| { 2730 if (try evt.User.readByEmail(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, email)) |user| { 2731 return .{ .user_name = user.name }; 2732 } 2733 } 2734 return .{ .email = try arena.allocator().dupe(u8, email) }; 2735 } 2736 }; 2737 2738 // the "a:" link to user `name`'s page. 2739 pub fn userLink(page_arena: *std.heap.ArenaAllocator, name: []const u8) ![]const u8 { 2740 const parsed = RoutablePage.Array(evt.User.name_max_len).from(name) orelse return error.RouteTooLong; 2741 const url = try (RoutablePage{ .user_repos = .{ .name = parsed } }).toUrl(page_arena); 2742 return page_arena.allocator().print("a:{s}", .{url}); 2743 } 2744 2745 // a focusable " author " box showing `author`, linking to their user page 2746 // when it is a known user 2747 pub fn authorBox(allocator: std.mem.Allocator, page_arena: *std.heap.ArenaAllocator, author: Author) !wgt.TextBox { 2748 const text = switch (author) { 2749 .unknown => "", 2750 .email, .user_name => |t| t, 2751 }; 2752 var tb = try wgt.TextBox.init(allocator, text, .{ .border = .single, .round_corners = true, .wrap_kind = .none, .top_label = .{ .text = " author " } }); 2753 errdefer tb.deinit(allocator); 2754 tb.getFocus().mode = .all; 2755 switch (author) { 2756 .user_name => |name| tb.getFocus().kind = .{ .custom = try userLink(page_arena, name) }, 2757 else => {}, 2758 } 2759 return tb; 2760 } 2761 2762 // native-TUI navigation 2763 pub const Nav = struct { 2764 root: Widget, 2765 // backs the current page (its Page data and the page-scoped strings its 2766 // widgets build). owned here, swapped on each navigation. session.page_arena 2767 // tracks whichever of these is current so widgets allocate into it. 2768 arena: *std.heap.ArenaAllocator, 2769 // the login the current root was built for 2770 user_id: ?[evt.event_id_size]u8, 2771 history: std.ArrayList(Entry), 2772 2773 // each retained page keeps its own arena, freed when the page leaves the 2774 // stack (popped on back, evicted at cap, or on deinit). this is what keeps a 2775 // long-lived session from accumulating every page it ever visited. 2776 const Entry = struct { root: Widget, route: RoutablePage, arena: *std.heap.ArenaAllocator, user_id: ?[evt.event_id_size]u8 }; 2777 2778 // cap on retained back-history so the chain can't grow memory without bound 2779 const max_history: usize = 16; 2780 2781 pub fn init(allocator: std.mem.Allocator, session: *Session) !Nav { 2782 session.back = .unavailable; 2783 const arena = try allocator.create(std.heap.ArenaAllocator); 2784 arena.* = std.heap.ArenaAllocator.init(allocator); 2785 errdefer { 2786 arena.deinit(); 2787 allocator.destroy(arena); 2788 } 2789 2790 return .{ 2791 .root = try initCurrentRoot(allocator, arena, session), 2792 .arena = arena, 2793 .user_id = session.userId(), 2794 .history = .empty, 2795 }; 2796 } 2797 2798 pub fn deinit(self: *Nav, allocator: std.mem.Allocator) void { 2799 self.root.deinit(allocator); 2800 freeArena(allocator, self.arena); 2801 for (self.history.items) |*entry| { 2802 entry.root.deinit(allocator); 2803 freeArena(allocator, entry.arena); 2804 } 2805 self.history.deinit(allocator); 2806 } 2807 2808 // rebuild the current page in place from a current moment 2809 fn rebuild(self: *Nav, allocator: std.mem.Allocator, session: *Session) !void { 2810 if (session.haxy_moment == null and session.local == null) return; 2811 const arena = try allocator.create(std.heap.ArenaAllocator); 2812 arena.* = std.heap.ArenaAllocator.init(allocator); 2813 errdefer freeArena(allocator, arena); 2814 2815 const new_root = try initCurrentRoot(allocator, arena, session); 2816 2817 self.root.deinit(allocator); 2818 freeArena(allocator, self.arena); 2819 self.root = new_root; 2820 self.arena = arena; 2821 self.user_id = session.userId(); 2822 } 2823 2824 // build the current page's root in `arena`, or the not-found page's when 2825 // the route names nothing 2826 fn initCurrentRoot(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator, session: *Session) !Widget { 2827 session.page_arena = arena; 2828 const page = try arena.allocator().create(Page); 2829 page.* = Page.init(arena, session, session.data.current_page) catch |err| switch (err) { 2830 error.NotFound => blk: { 2831 session.data.current_page = .not_found; 2832 break :blk .not_found; 2833 }, 2834 else => |e| return e, 2835 }; 2836 return initRoot(allocator, page, session); 2837 } 2838 2839 fn freeArena(allocator: std.mem.Allocator, arena: *std.heap.ArenaAllocator) void { 2840 arena.deinit(); 2841 allocator.destroy(arena); 2842 } 2843 2844 // reconcile the displayed root with the session's navigation state. a 2845 // forward nav (current_page moved to a different parent page) pushes the 2846 // current root and builds the new page in a fresh arena; a back request 2847 // frees the current page and restores the previous one. when escape is 2848 // pressed with no history left we switch to the quit tab instead of quitting. 2849 // returns whether the root was replaced. 2850 pub fn sync(self: *Nav, allocator: std.mem.Allocator, session: *Session) !bool { 2851 // refresh: rebuild the current page in place from a current moment 2852 if (session.refresh_requested) { 2853 session.refresh_requested = false; 2854 try self.rebuild(allocator, session); 2855 return true; 2856 } 2857 2858 if (session.back == .requested) { 2859 if (self.history.pop()) |entry| { 2860 session.back = if (self.history.items.len == 0) .unavailable else .available; 2861 self.root.deinit(allocator); 2862 freeArena(allocator, self.arena); 2863 self.root = entry.root; 2864 self.arena = entry.arena; 2865 self.user_id = entry.user_id; 2866 session.page_arena = entry.arena; 2867 session.data.current_page = entry.route; 2868 // a page built under another login is rebuilt rather than restored 2869 if (!std.meta.eql(entry.user_id, session.userId())) { 2870 try self.rebuild(allocator, session); 2871 return true; 2872 } 2873 chooseAnsiArtForNavigation(session); 2874 return true; 2875 } 2876 session.back = .unavailable; 2877 // nothing to go back to; switch to the quit confirmation 2878 const root_focus = self.root.getFocus(); 2879 var iter = root_focus.children.iterator(); 2880 while (iter.next()) |entry| { 2881 switch (entry.value_ptr.focus.kind) { 2882 .custom => |custom| if (std.mem.eql(u8, custom, Quit.tab_kind)) { 2883 root_focus.setFocus(entry.key_ptr.*); 2884 // a Stack only builds its selected child, so the quit 2885 // button isn't in the focus tree until a build runs with 2886 // the quit tab selected. build once, then send a 2887 // synthetic arrow_down to drop focus from the tab onto 2888 // the button so it's ready to confirm. 2889 try self.root.build(allocator, .{ 2890 .min_size = .{ .width = null, .height = 40 }, 2891 .max_size = .{ .width = 80, .height = null }, 2892 }, root_focus); 2893 try self.root.input(allocator, .arrow_down, root_focus); 2894 break; 2895 }, 2896 else => {}, 2897 } 2898 } 2899 return false; 2900 } 2901 2902 // forward navigation: navigate() set next_page to the page to move to (a 2903 // cross-page link or tab change crossing pages) 2904 if (session.next_page) |route| { 2905 session.next_page = null; 2906 if (session.haxy_moment == null and session.local == null) return false; 2907 const previous_route = session.data.current_page; 2908 // the page we navigated to becomes the current page 2909 session.data.current_page = route; 2910 session.back = .available; 2911 2912 const arena = try allocator.create(std.heap.ArenaAllocator); 2913 arena.* = std.heap.ArenaAllocator.init(allocator); 2914 errdefer freeArena(allocator, arena); 2915 2916 const new_root = try initCurrentRoot(allocator, arena, session); 2917 2918 try self.history.append(allocator, .{ .root = self.root, .route = previous_route, .arena = self.arena, .user_id = self.user_id }); 2919 // drop the oldest entry (freeing its widget tree and arena) once over cap 2920 if (self.history.items.len > max_history) { 2921 var oldest = self.history.orderedRemove(0); 2922 oldest.root.deinit(allocator); 2923 freeArena(allocator, oldest.arena); 2924 } 2925 self.root = new_root; 2926 self.arena = arena; 2927 self.user_id = session.userId(); 2928 return true; 2929 } 2930 return false; 2931 } 2932 }; 2933 2934 pub fn initRoot(allocator: std.mem.Allocator, page: *const Page, session: *Session) !Widget { 2935 const page_widget: Widget = switch (page.*) { 2936 .home => |*p| .{ .home = try .init(allocator, p, session) }, 2937 .user => |*p| .{ .user = try .init(allocator, p, session) }, 2938 .repo => |*p| .{ .repo = try .init(allocator, p, session) }, 2939 .fork => |*p| .{ .fork = try .init(allocator, p, session) }, 2940 .not_found => .{ .not_found = try .init(allocator, session) }, 2941 }; 2942 2943 chooseAnsiArtForNavigation(session); 2944 2945 // on the TUI/SSH, the page sits above a one-row footer showing its web 2946 // url, when there's a web UI to point at 2947 var root = if (session.is_terminal) blk: { 2948 var box = try wgt.Box(Widget).init(allocator, .{ .border = null, .direction = .vert }); 2949 errdefer box.deinit(allocator); 2950 const bg_id = bg_blk: { 2951 var background = try widget.AnsiBackground.init(allocator, page_widget, session); 2952 errdefer background.deinit(allocator); 2953 const id = background.getFocus().id; 2954 try box.children.put(allocator, id, .{ .widget = .{ .background = background }, .rect = null, .min_size = null }); 2955 break :bg_blk id; 2956 }; 2957 if (session.web_port != null) { 2958 var footer = try widget.Footer.init(allocator, session); 2959 errdefer footer.deinit(allocator); 2960 try box.children.put(allocator, footer.getFocus().id, .{ .widget = .{ .footer = footer }, .rect = null, .min_size = .{ .width = null, .height = 1 } }); 2961 } 2962 box.getFocus().child_id = bg_id; 2963 break :blk Widget{ .box = box }; 2964 } else Widget{ .background = try widget.AnsiBackground.init(allocator, page_widget, session) }; 2965 errdefer root.deinit(allocator); 2966 2967 // input-owning views build their TextInputs in init, so reset their 2968 // registrations here 2969 session.text_inputs.clearRetainingCapacity(); 2970 2971 try root.build(allocator, .{ 2972 .min_size = .{ .width = null, .height = 40 }, 2973 .max_size = .{ .width = 100, .height = null }, 2974 }, root.getFocus()); 2975 2976 return root; 2977 } 2978 2979 // native and server-side sessions choose from the embedded collection. WASM 2980 // keeps the art serialized by the server instead. 2981 fn chooseAnsiArtForNavigation(session: *Session) void { 2982 if (comptime ansi_art.art.len == 0) return; 2983 if (session.data.current_page == .not_found) { 2984 session.data.ansi_art = ansi_art.not_found; 2985 return; 2986 } 2987 const io = session.io orelse return; 2988 var random: usize = undefined; 2989 io.random(std.mem.asBytes(&random)); 2990 session.data.ansi_art = ansi_art.art[random % ansi_art.art.len]; 2991 } 2992