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 = 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 = 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 = wgt.TextInput(ui.Widget).init(.{ .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 = wgt.TextInput(ui.Widget).init(.{ .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 try self.center.build(allocator, constraint, root_focus); 124 } 125 126 pub fn input(self: *View, allocator: std.mem.Allocator, key: inp.Key, root_focus: *Focus) !void { 127 const box = &self.center.child.box; 128 const child_id = box.focus.child_id orelse return; 129 const current = self.indexOf(child_id) orelse return; 130 131 switch (key) { 132 // Shift+Tab walks backward through the form, matching the 133 // typical UX; arrow_up does the same. 134 .arrow_up, .back_tab => if (current > 0) { 135 try root_focus.setFocus(self.nav_ids[current - 1]); 136 return; 137 }, 138 // Tab moves to the next field, matching the form-style UX users 139 // expect; arrow_down does the same. 140 .arrow_down, .tab => if (current + 1 < self.nav_ids.len) { 141 try root_focus.setFocus(self.nav_ids[current + 1]); 142 return; 143 }, 144 // submit on Enter from any nav field — typical "press Enter in 145 // a form to submit" UX 146 .enter => { 147 try self.submit(allocator, root_focus); 148 return; 149 }, 150 else => {}, 151 } 152 153 if (current == button_index) { 154 switch (key) { 155 .mouse => |mouse| { 156 if (mouse.action == .press and mouse.action.press == .left) { 157 if (root_focus.children.get(child_id)) |entry| { 158 const r = entry.rect; 159 if (mouse.x >= r.x and mouse.y >= r.y and 160 mouse.x < r.x + r.size.width and mouse.y < r.y + r.size.height) 161 { 162 try self.submit(allocator, root_focus); 163 return; 164 } 165 } 166 } 167 }, 168 else => {}, 169 } 170 } 171 172 const username_input = &box.children.values()[username_index].widget.text_input; 173 const password_input = &box.children.values()[password_index].widget.text_input; 174 const username_len_before = username_input.content.items.len; 175 const password_len_before = password_input.content.items.len; 176 177 if (box.children.getIndex(child_id)) |idx| { 178 try box.children.values()[idx].widget.input(allocator, key, root_focus); 179 } 180 181 if (username_input.content.items.len != username_len_before or 182 password_input.content.items.len != password_len_before) 183 { 184 // any edit clears the failure flag so the "(invalid)" label 185 // doesn't linger after the user has typed a correction. 186 self.session.data.login_failure = null; 187 } 188 } 189 190 pub fn clearGrid(self: *View) void { 191 self.center.clearGrid(); 192 } 193 194 pub fn getGrid(self: View) ?Grid { 195 return self.center.getGrid(); 196 } 197 198 pub fn getFocus(self: *View) *Focus { 199 return self.center.getFocus(); 200 } 201 202 pub fn getSelectedIndex(self: View) ?usize { 203 const child_id = self.center.child.box.focus.child_id orelse return null; 204 return self.indexOf(child_id); 205 } 206 207 fn indexOf(self: View, child_id: usize) ?usize { 208 for (self.nav_ids, 0..) |id, i| { 209 if (id == child_id) return i; 210 } 211 return null; 212 } 213 214 fn submit(self: *View, allocator: std.mem.Allocator, root_focus: *Focus) !void { 215 if (comptime wasm) { 216 // no DB cursor available on the wasm render path 217 self.session.data.login_failure = .unknown_user; 218 return; 219 } 220 221 const box = &self.center.child.box; 222 const username_input = &box.children.values()[username_index].widget.text_input; 223 const password_input = &box.children.values()[password_index].widget.text_input; 224 225 const username = try username_input.text(allocator); 226 defer allocator.free(username); 227 228 const password = try password_input.text(allocator); 229 defer allocator.free(password); 230 231 const haxy_moment = self.session.haxy_moment orelse { 232 // no DB context (e.g. wasm/web rendering path); treat as unknown. 233 self.session.data.login_failure = .unknown_user; 234 return; 235 }; 236 237 const result = try evt.User.verifyCredentials(evt.AdminDB, evt.admin_repo_opts.hash, haxy_moment, self.session.arena, username, password); 238 switch (result) { 239 .unknown_user => { 240 self.session.data.login_failure = .unknown_user; 241 return; 242 }, 243 .wrong_password => { 244 self.session.data.login_failure = .wrong_password; 245 return; 246 }, 247 .success => |user_id| { 248 // dupe user_id into the arena so the session can hold a stable slice 249 const user_id_stable = try self.session.arena.allocator().dupe(u8, &user_id); 250 self.session.data.user_id = user_id_stable; 251 self.session.data.login_failure = null; 252 253 // adopt the user's persisted prefs 254 try self.session.loadUserPrefs(); 255 256 // wipe the entered credentials so they don't linger if the 257 // user returns to this page after logging out 258 username_input.clear(allocator); 259 password_input.clear(allocator); 260 261 // jump focus back to the users tab — the login button we 262 // just pressed is about to be hidden by the tab-label swap 263 try root_focus.setFocus(self.success_redirect_tab_id); 264 }, 265 } 266 } 267 }; 268