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 success_redirect_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, success_redirect_tab_id: usize) !View { 42 var box = try wgt.Box(ui.Widget).init(allocator, .{ .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 = switch (session.data.current_page) { 46 .user, .user_settings, .user_auth => |name| try std.fmt.allocPrint(session.page_arena.allocator(), "form:/user/{s}/login", .{name.slice()}), 47 else => "form:/login", 48 } }; 49 50 var nav_ids: [3]usize = undefined; 51 52 { 53 var username = try wgt.TextInput(ui.Widget).init(allocator, .{ .label = " username ", .name = "username", .rounded_corners = true, .render_content = !wasm }); 54 errdefer username.deinit(allocator); 55 username.getFocus().focusable = true; 56 nav_ids[username_index] = username.getFocus().id; 57 try box.children.put(allocator, username.getFocus().id, .{ 58 .widget = .{ .text_input = username }, 59 .rect = null, 60 .min_size = null, 61 }); 62 } 63 64 { 65 var password = try wgt.TextInput(ui.Widget).init(allocator, .{ .label = " password ", .password = true, .name = "password", .rounded_corners = true, .render_content = !wasm }); 66 errdefer password.deinit(allocator); 67 password.getFocus().focusable = true; 68 nav_ids[password_index] = password.getFocus().id; 69 try box.children.put(allocator, password.getFocus().id, .{ 70 .widget = .{ .text_input = password }, 71 .rect = null, 72 .min_size = null, 73 }); 74 } 75 76 { 77 var button = try wgt.TextBox(ui.Widget).init(allocator, "login", .{ .border_style = .single, .rounded_corners = true, .wrap_kind = .none }); 78 errdefer button.deinit(allocator); 79 button.getFocus().focusable = true; 80 // the renderer distinguishes plain clickables from buttons that 81 // should POST to a server route by this kind. 82 button.getFocus().kind = .{ .custom = "submit" }; 83 nav_ids[button_index] = button.getFocus().id; 84 try box.children.put(allocator, button.getFocus().id, .{ 85 .widget = .{ .text_box = button }, 86 .rect = null, 87 .min_size = null, 88 }); 89 } 90 91 box.getFocus().child_id = nav_ids[username_index]; 92 93 return .{ 94 .center = try ui.Center.init(allocator, .{ .box = box }, .both), 95 .data = data, 96 .session = session, 97 .nav_ids = nav_ids, 98 .success_redirect_tab_id = success_redirect_tab_id, 99 }; 100 } 101 102 pub fn deinit(self: *View, allocator: std.mem.Allocator) void { 103 self.center.deinit(allocator); 104 } 105 106 pub fn build(self: *View, allocator: std.mem.Allocator, constraint: layout.Constraint, root_focus: *Focus) !void { 107 const box = &self.center.child.box; 108 109 const failure = self.session.data.login_failure; 110 111 const username_input = &box.children.values()[username_index].widget.text_input; 112 username_input.options.label = if (failure == .unknown_user) 113 " username (invalid) " 114 else 115 " username "; 116 117 const password_input = &box.children.values()[password_index].widget.text_input; 118 password_input.options.label = if (failure == .wrong_password) 119 " password (invalid) " 120 else 121 " password "; 122 123 // refresh our entries in the session's focus-id -> *TextInput map with 124 // this frame's current input addresses, so the web/wasm form handling 125 // can find them by focus id 126 const inputs_arena = self.session.arena.allocator(); 127 try self.session.text_inputs.put(inputs_arena, username_input.getFocus().id, username_input); 128 try self.session.text_inputs.put(inputs_arena, password_input.getFocus().id, password_input); 129 130 try self.center.build(allocator, constraint, root_focus); 131 } 132 133 pub fn input(self: *View, allocator: std.mem.Allocator, key: inp.Key, root_focus: *Focus) !void { 134 const box = &self.center.child.box; 135 const child_id = box.focus.child_id orelse return; 136 const current = self.indexOf(child_id) orelse return; 137 138 switch (key) { 139 // Shift+Tab walks backward through the form, matching the 140 // typical UX; arrow_up does the same. 141 .arrow_up, .back_tab => if (current > 0) { 142 try root_focus.setFocus(self.nav_ids[current - 1]); 143 return; 144 }, 145 // Tab moves to the next field, matching the form-style UX users 146 // expect; arrow_down does the same. 147 .arrow_down, .tab => if (current + 1 < self.nav_ids.len) { 148 try root_focus.setFocus(self.nav_ids[current + 1]); 149 return; 150 }, 151 // submit on Enter from any nav field — typical "press Enter in 152 // a form to submit" UX 153 .enter => { 154 try self.submit(allocator, root_focus); 155 return; 156 }, 157 else => {}, 158 } 159 160 if (current == button_index) { 161 switch (key) { 162 .mouse => |mouse| { 163 if (mouse.action == .press and mouse.action.press == .left) { 164 if (root_focus.children.get(child_id)) |entry| { 165 const r = entry.rect; 166 if (mouse.x >= r.x and mouse.y >= r.y and 167 mouse.x < r.x + r.size.width and mouse.y < r.y + r.size.height) 168 { 169 try self.submit(allocator, root_focus); 170 return; 171 } 172 } 173 } 174 }, 175 else => {}, 176 } 177 } 178 179 const username_input = &box.children.values()[username_index].widget.text_input; 180 const password_input = &box.children.values()[password_index].widget.text_input; 181 const username_len_before = username_input.content.items.len; 182 const password_len_before = password_input.content.items.len; 183 184 if (box.children.getIndex(child_id)) |idx| { 185 try box.children.values()[idx].widget.input(allocator, key, root_focus); 186 } 187 188 if (username_input.content.items.len != username_len_before or 189 password_input.content.items.len != password_len_before) 190 { 191 // any edit clears the failure flag so the "(invalid)" label 192 // doesn't linger after the user has typed a correction. 193 self.session.data.login_failure = null; 194 } 195 } 196 197 pub fn clearGrid(self: *View) void { 198 self.center.clearGrid(); 199 } 200 201 pub fn getGrid(self: View) ?Grid { 202 return self.center.getGrid(); 203 } 204 205 pub fn getFocus(self: *View) *Focus { 206 return self.center.getFocus(); 207 } 208 209 pub fn getSelectedIndex(self: View) ?usize { 210 const child_id = self.center.child.box.focus.child_id orelse return null; 211 return self.indexOf(child_id); 212 } 213 214 fn indexOf(self: View, child_id: usize) ?usize { 215 for (self.nav_ids, 0..) |id, i| { 216 if (id == child_id) return i; 217 } 218 return null; 219 } 220 221 fn submit(self: *View, allocator: std.mem.Allocator, root_focus: *Focus) !void { 222 if (comptime wasm) { 223 // no DB cursor available on the wasm render path 224 self.session.data.login_failure = .unknown_user; 225 return; 226 } 227 228 const box = &self.center.child.box; 229 const username_input = &box.children.values()[username_index].widget.text_input; 230 const password_input = &box.children.values()[password_index].widget.text_input; 231 232 const username = try username_input.text(allocator); 233 defer allocator.free(username); 234 235 const password = try password_input.text(allocator); 236 defer allocator.free(password); 237 238 const haxy_moment = self.session.haxy_moment orelse { 239 // no DB context (e.g. wasm/web rendering path); treat as unknown. 240 self.session.data.login_failure = .unknown_user; 241 return; 242 }; 243 244 const result = try evt.User.verifyCredentials(evt.AdminDB, evt.admin_repo_opts.hash, haxy_moment, self.session.arena, username, password); 245 switch (result) { 246 .unknown_user => { 247 self.session.data.login_failure = .unknown_user; 248 return; 249 }, 250 .wrong_password => { 251 self.session.data.login_failure = .wrong_password; 252 return; 253 }, 254 .success => |user_id| { 255 // dupe user_id into the arena so the session can hold a stable slice 256 const user_id_stable = try self.session.arena.allocator().dupe(u8, &user_id); 257 self.session.data.user_id = user_id_stable; 258 self.session.data.login_failure = null; 259 260 // adopt the user's persisted prefs 261 try self.session.loadUserPrefs(); 262 263 // wipe the entered credentials so they don't linger if the 264 // user returns to this page after logging out 265 username_input.clear(allocator); 266 password_input.clear(allocator); 267 268 // jump focus back to the users tab — the login button we 269 // just pressed is about to be hidden by the tab-label swap 270 try root_focus.setFocus(self.success_redirect_tab_id); 271 }, 272 } 273 } 274 }; 275