implement login

1 files changed, 133 insertions, 0 deletions

diff --git a/src/storage/user.zig b/src/storage/user.zig
new file mode 100644
index 0000000..c981661
--- /dev/null
+++ b/src/storage/user.zig
@@ -0,0 +1,133 @@
+const std = @import("std");
+const Storage = @import("root.zig");
+
+const Self = @This();
+
+pub const UserInfo = struct {
+    name: []const u8,
+    full_name: []const u8,
+    birthday: []const u8,
+    hash: []const u8,
+    is_admin: bool,
+};
+
+dir: std.fs.Dir,
+info: UserInfo,
+arena: std.heap.ArenaAllocator,
+
+pub fn open(
+    storage: *Storage,
+    name: []const u8,
+    inner_allocator: std.mem.Allocator
+) !Self {
+    var arena: std.heap.ArenaAllocator = .init(inner_allocator);
+    errdefer arena.deinit();
+    const allocator = arena.allocator();
+
+    var user_dir = try storage.dir.openDir("user", .{});
+    defer user_dir.close();
+
+    var dir = try user_dir.openDir(name, .{});
+    errdefer dir.close();
+
+    const file = try dir.openFile("info.json", .{});
+    defer file.close();
+    const content = try file.readToEndAlloc(allocator, std.math.maxInt(usize));
+
+    const info = try std.json.parseFromSliceLeaky(UserInfo, allocator, content, .{});
+
+    return .{
+        .dir = dir,
+        .arena = arena,
+        .info = info,
+    };
+}
+
+pub fn new(
+    storage: *Storage,
+    name: []const u8,
+    full_name: []const u8,
+    birthday: []const u8,
+    password: []const u8,
+    is_admin: bool,
+    inner_allocator: std.mem.Allocator
+) !Self {
+    var arena: std.heap.ArenaAllocator = .init(inner_allocator);
+    const allocator = arena.allocator();
+    errdefer arena.deinit();
+
+    var user_dir = try storage.dir.openDir("user", .{});
+    defer user_dir.close();
+
+    try user_dir.makeDir(name);
+    var dir = try user_dir.openDir(name, .{});
+    errdefer dir.close();
+
+    var file = try dir.createFile("info.json", .{});
+    file.close();
+
+    const hash_buf = try allocator.alloc(u8, 256);
+    const hash = try std.crypto.pwhash.bcrypt.strHash(
+        password,
+        .{
+            .params = .{
+                .rounds_log = 3,
+                .silently_truncate_password = false,
+            },
+            .encoding = .phc,
+        },
+        hash_buf
+    );
+
+    const info: UserInfo = .{
+        .name = name,
+        .full_name = full_name,
+        .birthday = birthday,
+        .hash = hash,
+        .is_admin = is_admin,
+    };
+
+
+    return .{
+        .dir = dir,
+        .arena = arena,
+        .info = info,
+    };
+}
+
+pub fn sync(self: *Self) !void {
+    const file = try self.dir.openFile("info.json", .{ .mode = .write_only });
+    defer file.close();
+
+    var buffer: [1024]u8 = undefined;
+    var writer = file.writer(&buffer);
+
+    var stringify = std.json.Stringify {
+        .writer = &writer.interface,
+        .options = .{ .whitespace = .indent_2 }
+    };
+
+    try stringify.write(self.info);
+    try writer.interface.flush();
+}
+
+pub fn check_password(self: *Self, password: []const u8) bool {
+    std.crypto.pwhash.bcrypt.strVerify(self.info.hash, password, .{
+        .silently_truncate_password = false,
+    }) catch return false;
+    return true;
+}
+
+pub fn deinit(self: *Self) void {
+    self.dir.close();
+    self.arena.deinit();
+    self.* = undefined;
+}
+
+pub fn exists(storage: *Storage, name: []const u8) bool {
+    var user = storage.dir.openDir("user", .{}) catch return false;
+    defer user.deinit();
+
+    user.access(name) catch return false;
+    return true;
+}