HAXY

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╭ Login.zig ────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯

╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯

.. ╭─────────────────────────────────╮ │Login.zig │ ╰─────────────────────────────────╯ Logout.zig

1 const std = @import("std"); 2 const builtin = @import("builtin"); 3 const evt = @import("../../event.zig"); 4 const ui = @import("../../ui.zig"); 5 const xit = @import("xit"); 6 const rp = xit.repo; 7 const hash = xit.hash; 8 const xitui = xit.xitui; 9 const wgt = xitui.widget; 10 const layout = xitui.layout; 11 const inp = xitui.input; 12 const Grid = xitui.grid.Grid; 13 const Focus = xitui.focus.Focus; 14 const bcrypt = std.crypto.pwhash.bcrypt; 15 16 const wasm = builtin.target.cpu.arch == .wasm32; 17 18 const Self = @This(); 19 20 // classifies a failed /login attempt; null in session.data.login_failure means 21 // "no failure to surface". 22 pub const Failure = enum { wrong_password, unknown_user }; 23 24 pub fn init() Self { 25 return .{}; 26 } 27 28 pub const View = struct { 29 center: ui.Center, 30 data: *const Self, 31 session: *ui.Session, 32 nav_ids: [3]usize, 33 // focus id of the header's "users" tab; on a successful submit we jump 34 // focus there so the user isn't stranded on the login button. 35 users_tab_id: usize, 36 37 const username_index: usize = 0; 38 const password_index: usize = 1; 39 const button_index: usize = 2; 40 41 pub fn init(allocator: std.mem.Allocator, data: *const Self, session: *ui.Session, users_tab_id: usize) !View { 42 var box = wgt.Box(ui.Widget).init(.{ .border_style = null, .rounded_corners = true, .direction = .vert }); 43 errdefer box.deinit(allocator); 44 // marks this subtree as an HTML form scope for the web overlay 45 box.getFocus().kind = .{ .custom = "form:/login" }; 46 47 var nav_ids: [3]usize = undefined; 48 49 { 50 var username = wgt.TextInput(ui.Widget).init(.{ .label = " username ", .name = "username", .rounded_corners = true, .render_content = !wasm }); 51 errdefer username.deinit(allocator); 52 username.getFocus().focusable = true; 53 nav_ids[username_index] = username.getFocus().id; 54 try box.children.put(allocator, username.getFocus().id, .{ 55 .widget = .{ .text_input = username }, 56 .rect = null, 57 .min_size = null, 58 }); 59 } 60 61 { 62 var password = wgt.TextInput(ui.Widget).init(.{ .label = " password ", .password = true, .name = "password", .rounded_corners = true, .render_content = !wasm }); 63 errdefer password.deinit(allocator); 64 password.getFocus().focusable = true; 65 nav_ids[password_index] = password.getFocus().id; 66 try box.children.put(allocator, password.getFocus().id, .{ 67 .widget = .{ .text_input = password }, 68 .rect = null, 69 .min_size = null, 70 }); 71 } 72 73 { 74 var button = try wgt.TextBox(ui.Widget).init(allocator, "login", .{ .border_style = .single, .rounded_corners = true, .wrap_kind = .none }); 75 errdefer button.deinit(allocator); 76 button.getFocus().focusable = true; 77 // the renderer distinguishes plain clickables from buttons that 78 // should POST to a server route by this kind. 79 button.getFocus().kind = .{ .custom = "submit" }; 80 nav_ids[button_index] = button.getFocus().id; 81 try box.children.put(allocator, button.getFocus().id, .{ 82 .widget = .{ .text_box = button }, 83 .rect = null, 84 .min_size = null, 85 }); 86 } 87 88 box.getFocus().child_id = nav_ids[username_index]; 89 90 return .{ 91 .center = try ui.Center.init(allocator, .{ .box = box }, .both), 92 .data = data, 93 .session = session, 94 .nav_ids = nav_ids, 95 .users_tab_id = users_tab_id, 96 }; 97 } 98 99 pub fn deinit(self: *View, allocator: std.mem.Allocator) void { 100 self.center.deinit(allocator); 101 } 102 103 pub fn build(self: *View, allocator: std.mem.Allocator, constraint: layout.Constraint, root_focus: *Focus) !void { 104 const box = &self.center.child.box; 105 106 const failure = self.session.data.login_failure; 107 108 const username_input = &box.children.values()[username_index].widget.text_input; 109 username_input.options.label = if (failure == .unknown_user) 110 " username (invalid) " 111 else 112 " username "; 113 114 const password_input = &box.children.values()[password_index].widget.text_input; 115 password_input.options.label = if (failure == .wrong_password) 116 " password (invalid) " 117 else 118 " password "; 119 120 try self.center.build(allocator, constraint, root_focus); 121 } 122 123 pub fn input(self: *View, allocator: std.mem.Allocator, key: inp.Key, root_focus: *Focus) !void { 124 const box = &self.center.child.box; 125 const child_id = box.focus.child_id orelse return; 126 const current = self.indexOf(child_id) orelse return; 127 128 switch (key) { 129 // Shift+Tab walks backward through the form, matching the 130 // typical UX; arrow_up does the same. 131 .arrow_up, .back_tab => if (current > 0) { 132 try root_focus.setFocus(self.nav_ids[current - 1]); 133 return; 134 }, 135 // Tab moves to the next field, matching the form-style UX users 136 // expect; arrow_down does the same. 137 .arrow_down, .tab => if (current + 1 < self.nav_ids.len) { 138 try root_focus.setFocus(self.nav_ids[current + 1]); 139 return; 140 }, 141 // submit on Enter from any nav field — typical "press Enter in 142 // a form to submit" UX 143 .enter => { 144 try self.submit(allocator, root_focus); 145 return; 146 }, 147 else => {}, 148 } 149 150 if (current == button_index) { 151 switch (key) { 152 .mouse => |mouse| { 153 if (mouse.action == .press and mouse.action.press == .left) { 154 if (root_focus.children.get(child_id)) |entry| { 155 const r = entry.rect; 156 if (mouse.x >= r.x and mouse.y >= r.y and 157 mouse.x < r.x + r.size.width and mouse.y < r.y + r.size.height) 158 { 159 try self.submit(allocator, root_focus); 160 return; 161 } 162 } 163 } 164 }, 165 else => {}, 166 } 167 } 168 169 const username_input = &box.children.values()[username_index].widget.text_input; 170 const password_input = &box.children.values()[password_index].widget.text_input; 171 const username_len_before = username_input.content.items.len; 172 const password_len_before = password_input.content.items.len; 173 174 if (box.children.getIndex(child_id)) |idx| { 175 try box.children.values()[idx].widget.input(allocator, key, root_focus); 176 } 177 178 if (username_input.content.items.len != username_len_before or 179 password_input.content.items.len != password_len_before) 180 { 181 // any edit clears the failure flag so the "(invalid)" label 182 // doesn't linger after the user has typed a correction. 183 self.session.data.login_failure = null; 184 } 185 } 186 187 pub fn clearGrid(self: *View) void { 188 self.center.clearGrid(); 189 } 190 191 pub fn getGrid(self: View) ?Grid { 192 return self.center.getGrid(); 193 } 194 195 pub fn getFocus(self: *View) *Focus { 196 return self.center.getFocus(); 197 } 198 199 pub fn getSelectedIndex(self: View) ?usize { 200 const child_id = self.center.child.box.focus.child_id orelse return null; 201 return self.indexOf(child_id); 202 } 203 204 fn indexOf(self: View, child_id: usize) ?usize { 205 for (self.nav_ids, 0..) |id, i| { 206 if (id == child_id) return i; 207 } 208 return null; 209 } 210 211 fn submit(self: *View, allocator: std.mem.Allocator, root_focus: *Focus) !void { 212 if (comptime wasm) { 213 // no DB cursor available on the wasm render path 214 self.session.data.login_failure = .unknown_user; 215 return; 216 } 217 218 const box = &self.center.child.box; 219 const username_input = &box.children.values()[username_index].widget.text_input; 220 const password_input = &box.children.values()[password_index].widget.text_input; 221 222 const username = try username_input.text(allocator); 223 defer allocator.free(username); 224 225 const password = try password_input.text(allocator); 226 defer allocator.free(password); 227 228 const haxy_moment = self.session.haxy_moment orelse { 229 // no DB context (e.g. wasm/web rendering path); treat as unknown. 230 self.session.data.login_failure = .unknown_user; 231 return; 232 }; 233 234 const result = try evt.User.verifyCredentials(evt.AdminDB, evt.admin_repo_opts.hash, haxy_moment, self.session.arena, username, password); 235 switch (result) { 236 .unknown_user => { 237 self.session.data.login_failure = .unknown_user; 238 return; 239 }, 240 .wrong_password => { 241 self.session.data.login_failure = .wrong_password; 242 return; 243 }, 244 .success => |user_id| { 245 // dupe user_id into the arena so the session can hold a stable slice 246 const user_id_stable = try self.session.arena.allocator().dupe(u8, &user_id); 247 self.session.data.user_id = user_id_stable; 248 self.session.data.login_failure = null; 249 250 // adopt the user's persisted prefs 251 try self.session.loadUserPrefs(); 252 253 // wipe the entered credentials so they don't linger if the 254 // user returns to this page after logging out 255 username_input.clear(allocator); 256 password_input.clear(allocator); 257 258 // jump focus back to the users tab — the login button we 259 // just pressed is about to be hidden by the tab-label swap 260 try root_focus.setFocus(self.users_tab_id); 261 }, 262 } 263 } 264 }; 265