X-Git-Url: https://gitweb.ps.run/chirp/blobdiff_plain/f3f8c8b971b7b8dcb2f391ab61dfd1f03da8da9e..1b308659679ddf5c21bd1321116e7a690fe5abf3:/src/main.zig

diff --git a/src/main.zig b/src/main.zig
index f8113dc..80a174a 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -33,6 +33,9 @@ const User = struct {
     posts: PostList,
     following: UserList,
     followers: UserList,
+
+    post_lists: PostListList,
+    feeds: UserListList,
 };
 
 const Post = struct {
@@ -52,6 +55,15 @@ const Post = struct {
     text: PostText,
 };
 
+const SavedPostList = struct {
+    name: Name,
+    list: PostList,
+};
+const SavedUserList = struct {
+    name: Name,
+    list: UserList,
+};
+
 const Vote = struct {
     const Kind = enum { Up, Down };
 
@@ -64,10 +76,11 @@ const Login = struct {
     user: User,
     session_token: SessionToken,
 };
+const Name = std.BoundedArray(u8, 32);
 const UserId = enum(u64) { _ };
 const PostId = enum(u64) { _ };
 const Timestamp = i64;
-const Username = std.BoundedArray(u8, 16);
+const Username = std.BoundedArray(u8, 32);
 const DisplayName = std.BoundedArray(u8, 64);
 const PasswordHash = std.BoundedArray(u8, 128);
 const SessionToken = u64;
@@ -76,6 +89,8 @@ const PostText = std.BoundedArray(u8, 1024);
 const PostList = db.Set(PostId);
 const UserList = db.Set(UserId);
 const VoteList = db.SetList(UserId, Vote);
+const PostListList = db.List(SavedPostList);
+const UserListList = db.List(SavedUserList);
 
 fn parse_enum(comptime E: type, buf: []const u8, base: u8) !E {
     return @enumFromInt(try std.fmt.parseUnsigned(@typeInfo(E).Enum.tag_type, buf, base));
@@ -123,8 +138,8 @@ fn reencode(text: []const u8) !PostText {
     return result;
 }
 
-fn decode(text: []const u8) !std.BoundedArray(u8, 32) {
-    var result = try std.BoundedArray(u8, 32).init(0);
+fn decode(text: []const u8) !std.BoundedArray(u8, 1024) {
+    var result = try std.BoundedArray(u8, 1024).init(0);
 
     const max_len = @min(text.len, 1024); // TODO: PostText length
 
@@ -184,12 +199,14 @@ const Chirp = struct {
         }
     }
 
-    pub fn register_user(env: *lmdb.Env, username: []const u8, password: []const u8) !bool {
+    pub fn register_user(env: lmdb.Env, username: []const u8, password: []const u8) !bool {
         const username_array = try Username.fromSlice(username);
         const display_name = try DisplayName.fromSlice(username);
 
         const txn = try env.txn();
-        defer txn.commit() catch {};
+        defer txn.commit() catch |err| {
+            std.debug.print("error registering user: {}\n", .{err});
+        };
 
         const users = try Db.users(txn);
         const user_ids = try Db.user_ids(txn);
@@ -207,6 +224,8 @@ const Chirp = struct {
                 .posts = try PostList.init(txn),
                 .following = try UserList.init(txn),
                 .followers = try UserList.init(txn),
+                .post_lists = try PostListList.init(txn),
+                .feeds = try UserListList.init(txn),
             });
 
             try user_ids.put(username_array, user_id);
@@ -216,7 +235,7 @@ const Chirp = struct {
     }
 
     pub fn login_user(
-        env: *lmdb.Env,
+        env: lmdb.Env,
         username: []const u8,
         password: []const u8,
     ) !SessionToken {
@@ -242,7 +261,7 @@ const Chirp = struct {
         }
     }
 
-    fn logout_user(env: *lmdb.Env, session_token: SessionToken) !void {
+    fn logout_user(env: lmdb.Env, session_token: SessionToken) !void {
         const txn = try env.txn();
         defer txn.commit() catch {};
 
@@ -250,7 +269,7 @@ const Chirp = struct {
         try sessions.del(session_token);
     }
 
-    fn append_post(env: *lmdb.Env, user_id: UserId, post_list: PostList, parent_id: ?PostId, quote_id: ?PostId, text: []const u8) !void {
+    fn append_post(env: lmdb.Env, user_id: UserId, post_list: PostList, parent_id: ?PostId, quote_id: ?PostId, text: []const u8) !void {
         var post_id: PostId = undefined;
 
         // TODO: do this in one commit
@@ -284,7 +303,7 @@ const Chirp = struct {
             defer txn.commit() catch {};
 
             var posts_view = try post_list.open(txn);
-            try posts_view.append(post_id, {});
+            try posts_view.append(post_id);
         }
 
         if (quote_id != null) {
@@ -294,11 +313,11 @@ const Chirp = struct {
             const posts = try Db.posts(txn);
             const quote_post = try posts.get(quote_id.?);
             var quotes = try quote_post.quotes.open(txn);
-            try quotes.append(post_id, {});
+            try quotes.append(post_id);
         }
     }
 
-    fn post(env: *lmdb.Env, user_id: UserId, text: []const u8) !void {
+    fn post(env: lmdb.Env, user_id: UserId, text: []const u8) !void {
         const txn = try env.txn();
 
         const users = try Db.users(txn);
@@ -309,7 +328,7 @@ const Chirp = struct {
         try append_post(env, user_id, user.posts, null, null, text);
     }
 
-    fn comment(env: *lmdb.Env, user_id: UserId, parent_post_id: PostId, text: []const u8) !void {
+    fn comment(env: lmdb.Env, user_id: UserId, parent_post_id: PostId, text: []const u8) !void {
         const txn = try env.txn();
 
         const posts = try Db.posts(txn);
@@ -320,7 +339,7 @@ const Chirp = struct {
         try append_post(env, user_id, parent_post.comments, parent_post_id, null, text);
     }
 
-    fn quote(env: *lmdb.Env, user_id: UserId, quote_post_id: PostId, text: []const u8) !void {
+    fn quote(env: lmdb.Env, user_id: UserId, quote_post_id: PostId, text: []const u8) !void {
         const txn = try env.txn();
 
         const users = try Db.users(txn);
@@ -331,7 +350,7 @@ const Chirp = struct {
         try append_post(env, user_id, user.posts, null, quote_post_id, text);
     }
 
-    fn vote(env: *lmdb.Env, post_id: PostId, user_id: UserId, kind: Vote.Kind) !void {
+    fn vote(env: lmdb.Env, post_id: PostId, user_id: UserId, kind: Vote.Kind) !void {
         const txn = try env.txn();
         defer txn.commit() catch {};
 
@@ -371,7 +390,7 @@ const Chirp = struct {
         }
     }
 
-    fn follow(env: *lmdb.Env, user_id: UserId, user_id_to_follow: UserId) !void {
+    fn follow(env: lmdb.Env, user_id: UserId, user_id_to_follow: UserId) !void {
         const txn = try env.txn();
         defer txn.commit() catch {};
 
@@ -387,14 +406,14 @@ const Chirp = struct {
             try user_following.del(user_id_to_follow);
             try user_to_follow_followers.del(user_id);
         } else if (!(user_following.has(user_id_to_follow) catch true) and !(user_to_follow_followers.has(user_id) catch true)) {
-            try user_following.append(user_id_to_follow, {});
-            try user_to_follow_followers.append(user_id, {});
+            try user_following.append(user_id_to_follow);
+            try user_to_follow_followers.append(user_id);
         } else {
             std.debug.print("Something went wrong when trying to unfollow\n", .{});
         }
     }
 
-    fn get_session_user_id(env: *lmdb.Env, session_token: SessionToken) !UserId {
+    fn get_session_user_id(env: lmdb.Env, session_token: SessionToken) !UserId {
         const txn = try env.txn();
         defer txn.abort();
 
@@ -403,7 +422,7 @@ const Chirp = struct {
         return try sessions.get(session_token);
     }
 
-    fn get_user(env: *lmdb.Env, user_id: UserId) !User {
+    fn get_user(env: lmdb.Env, user_id: UserId) !User {
         const txn = try env.txn();
         defer txn.abort();
 
@@ -441,34 +460,7 @@ fn html_form(res: *http.Response, comptime fmt_action: []const u8, args_action:
 
 // write {{{
 const TimeStr = std.BoundedArray(u8, 256);
-// fn time_str(_t: i64) TimeStr {
-//     var result = TimeStr.init(0) catch unreachable;
-
-//     const nthSecond: u64 = @intCast(_t);
-//     const nthDay = nthSecond / std.time.s_per_day;
-//     const secondInDay = nthSecond - nthDay * std.time.s_per_day;
-//     const hourInDay = secondInDay / std.time.s_per_hour;
-//     const secondInHour = secondInDay % std.time.s_per_hour;
-//     const minuteInHour = secondInHour / 60;
-//     const secondInMinute = secondInDay % std.time.s_per_min;
-
-//     const nthYear = nthDay / 365; // maybe check
-//     const year = 1970 + nthYear;
-//     const leapdays = year / 4 - year / 100 + year / 400;
-//     const secondInYear = nthSecond - (nthYear * 365 + leapdays) * std.time.s_per_day;
-//     const dayInYear = secondInYear / std.time.s_per_day;
-
-//     std.fmt.format(result.writer(), "<time>{:0>2}:{:0>2}:{:0>2} {:0>2}.{:0>2}.{:0>4} UTC</time>", .{
-//         hourInDay,
-//         minuteInHour,
-//         secondInMinute,
-//         dayInYear,
-//         0,
-//         year,
-//     }) catch unreachable;
-
-//     return result;
-// }
+
 // http://howardhinnant.github.io/date_algorithms.html
 fn time_str(_t: i64) TimeStr {
     const t: u64 = @intCast(_t);
@@ -504,15 +496,9 @@ fn write_header(res: *http.Response, logged_in: ?Login) !void {
         try res.write(
             \\<a href="/post">Post</a><br />
         , .{});
-        try res.write(
-            \\<a href="/edit">Edit</a><br />
-        , .{});
         try html_form(res, "/logout", .{}, .{
             \\type="submit" value="Logout"
         });
-        try html_form(res, "/quit", .{}, .{
-            \\type="submit" value="Quit"
-        });
         try res.write("<br /><br />", .{});
     } else {
         try res.write(
@@ -544,18 +530,6 @@ fn write_start(res: *http.Response) !void {
         \\  form {
         \\    display: inline-block;
         \\  }
-        \\  .toggle > form > input:placeholder-shown {
-        \\    display: none;
-        \\  }
-        \\  .toggle:hover > form > input {
-        \\    display: inline-block;
-        \\  }
-        \\  .toggle > form > input:placeholder-shown + input {
-        \\    display: none;
-        \\  }
-        \\  .toggle:hover > form > input + input {
-        \\    display: inline-block;
-        \\  }
         \\</style>
         \\</head>
         \\<body>
@@ -564,7 +538,7 @@ fn write_start(res: *http.Response) !void {
 fn write_end(res: *http.Response) !void {
     try res.write("</body></html>", .{});
 }
-fn write_post(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, post_id: PostId, recurse: enum { No, Once, Yes }) !void {
+fn write_post(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, post_id: PostId, options: struct { recurse: u8 = 0, show_comment_field: bool = false }) !void {
     const posts = try Db.posts(txn);
     const post = posts.get(post_id) catch {
         res.redirect("/") catch {};
@@ -579,9 +553,13 @@ fn write_post(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, post_id: Po
         \\<span>{s}</span><br />
     , .{ user.name.constSlice(), user.display_name.constSlice(), time_str(post.time).constSlice(), post.text.constSlice() });
 
-    if (recurse != .No and post.quote_id != null) {
+    if (post.quote_id) |quote_id| {
         try res.write("<div style=\"border: 1px solid black;\">", .{});
-        try write_post(res, txn, logged_in, post.quote_id.?, .No);
+        if (options.recurse > 0) {
+            try write_post(res, txn, logged_in, quote_id, .{ .recurse = options.recurse - 1 });
+        } else {
+            try res.write("<a href=\"/post/{x}\">...</a>", .{@intFromEnum(quote_id)});
+        }
         try res.write("</div>", .{});
     }
 
@@ -617,52 +595,56 @@ fn write_post(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, post_id: Po
 
     // Comment Count
     try res.write(
-        \\<span class="toggle">
         \\<a href="/post/{x}">&#x1F4AD; {}</a> 
     , .{ @intFromEnum(post.id), comments_view.len() });
-    if (logged_in != null) {
+
+    // Quote
+    try res.write(
+        \\<a href="/quotes/{x}">&#x1F501; {}</a> 
+    , .{ @intFromEnum(post.id), quotes_view.len() });
+
+    // Save to List
+    if (logged_in) |login| {
+        const lists_view = try login.user.post_lists.open(txn);
+        try res.write("<form action=\"/list_add\" method=\"post\">", .{});
+        try res.write("<select name=\"list_id\">", .{});
+        var it = lists_view.iterator();
+        while (it.next()) |kv| {
+            const name = kv.val.name;
+            const id = kv.val.list.idx.?;
+            try res.write("<option value=\"{x}\">{s}</option>", .{ id, name.constSlice() });
+        }
+        try res.write("</select>", .{});
+        try res.write("<input type=\"hidden\" name=\"post_id\" value=\"{x}\"></input>", .{@intFromEnum(post_id)});
+        try res.write("<input type=\"submit\" value=\"Save\"></input>", .{});
+        try res.write("</form>", .{});
+    }
+
+    // Comment field
+    // TODO: maybe always show comment field and prompt for login
+    if (options.show_comment_field and logged_in != null) {
+        try res.write("<br /><br />", .{});
         try html_form(res, "/comment", .{}, .{
             .{ "type=\"hidden\" value=\"{x}\" name=\"post_id\"", .{@intFromEnum(post.id)} },
             "type=\"text\" name=\"text\" placeholder=\"Text\"",
             "type=\"submit\" value=\"Comment\"",
         });
+        try res.write("<br />", .{});
     }
-    try res.write(
-        \\</span>
-    , .{});
-
-    // Quote
-    try res.write(
-        \\<span class="toggle">
-        \\<a href="/quotes/{x}">&#x1F501; {}</a> 
-    , .{ @intFromEnum(post.id), quotes_view.len() });
-    try html_form(res, "/quote", .{}, .{
-        .{ "type=\"hidden\" value=\"{x}\" name=\"post_id\"", .{@intFromEnum(post.id)} },
-        "type=\"text\" name=\"text\" placeholder=\"Text\"",
-        "type=\"submit\" value=\"Quote\"",
-    });
-    try res.write(
-        \\</span>
-        \\<br />
-    , .{});
 
     // Comments
-    if (recurse != .No and comments_view.len() > 0) {
+    if (options.recurse > 0 and comments_view.len() > 0) {
         try res.write(
-            \\<details>
+            \\<details{s}>
             \\<summary>Comments</summary>
-        , .{});
+        , .{if (options.recurse > 1) " open" else ""});
         try res.write("<div style=\"margin: 10px;\">", .{});
         var it = comments_view.iterator();
         var count: u8 = 0;
-        while (it.next()) |kv| {
-            try write_post(res, txn, logged_in, kv.key, switch (recurse) {
-                .Yes => .Yes,
-                .Once => .No,
-                else => unreachable,
-            });
+        while (it.next()) |comment_id| {
+            try write_post(res, txn, logged_in, comment_id, .{ .recurse = options.recurse - 1 });
             try res.write("<br />", .{});
-            if (recurse == .Once) {
+            if (options.recurse == 1) {
                 count += 1;
                 if (count >= 3) break;
             }
@@ -677,32 +659,30 @@ fn write_post(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, post_id: Po
         \\</div>
     , .{});
 }
-fn write_posts(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, user: User) !void {
-    const posts_view = try user.posts.open(txn);
+fn write_posts(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, post_list: PostList) !void {
+    const posts_view = try post_list.open(txn);
 
     var it = posts_view.reverse_iterator();
-    while (it.next()) |kv| {
-        const post_id = kv.key;
-
-        try write_post(res, txn, logged_in, post_id, .Once);
+    while (it.next()) |post_id| {
+        try write_post(res, txn, logged_in, post_id, .{ .recurse = 1 });
         try res.write("<br />", .{});
     }
 }
-fn write_timeline(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, user: User) !void {
+fn write_timeline(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, user_list: UserList) !void {
     const users = try Db.users(txn);
     const posts = try Db.posts(txn);
 
     var newest_post_ids = try std.BoundedArray(PostId, 10).init(0); // TODO: TimelinePostsCount
     var prev_newest_post: ?Post = null;
 
-    const following = try user.following.open(txn);
+    const following = try user_list.open(txn);
 
     while (true) {
         var newest_post: ?Post = null;
 
-        var it = following.iterator();
-        while (it.next()) |kv| {
-            const followed_user = try users.get(kv.key);
+        var following_it = following.iterator();
+        while (following_it.next()) |following_id| {
+            const followed_user = try users.get(following_id);
             const followed_posts = try followed_user.posts.open(txn);
 
             if (followed_posts.len() == 0) {
@@ -710,11 +690,12 @@ fn write_timeline(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, user: U
             }
 
             var followed_posts_it = followed_posts.reverse_iterator();
-            while (followed_posts_it.next()) |followed_post_kv| {
-                const last_post = try posts.get(followed_post_kv.key);
+            while (followed_posts_it.next()) |followed_post_id| {
+                const p = try posts.get(followed_post_id);
 
-                if ((prev_newest_post == null or last_post.time < prev_newest_post.?.time) and (newest_post == null or newest_post.?.time < last_post.time)) {
-                    newest_post = last_post;
+                if ((prev_newest_post == null or p.time < prev_newest_post.?.time) and (newest_post == null or newest_post.?.time < p.time)) {
+                    newest_post = p;
+                    break;
                 }
             }
         }
@@ -727,12 +708,578 @@ fn write_timeline(res: *http.Response, txn: lmdb.Txn, logged_in: ?Login, user: U
     }
 
     for (newest_post_ids.constSlice()) |post_id| {
-        try write_post(res, txn, logged_in, post_id, .Once);
+        try write_post(res, txn, logged_in, post_id, .{ .recurse = 1 });
         try res.write("<br />", .{});
     }
 }
 // }}}
 
+// GET {{{
+const GET = struct {
+    const Self = @This();
+
+    txn: lmdb.Txn,
+    req: *http.Request,
+    res: *http.Response,
+    logged_in: ?Login,
+
+    fn handle(self: Self) !bool {
+        const ti = @typeInfo(Self);
+        inline for (ti.Struct.decls) |f_decl| {
+            const has_arg = f_decl.name.len > 1 and f_decl.name[f_decl.name.len - 1] == '/';
+            const match = if (has_arg) std.mem.startsWith(u8, self.req.target, f_decl.name) else std.mem.eql(u8, self.req.target, f_decl.name);
+
+            if (match) {
+                const f = @field(Self, f_decl.name);
+                const fi = @typeInfo(@TypeOf(f));
+                if (fi.Fn.params.len == 1) {
+                    try @call(.auto, f, .{self});
+                } else {
+                    const arg_type = fi.Fn.params[1].type.?;
+                    const arg_info = @typeInfo(arg_type);
+                    var arg: arg_type = undefined;
+                    const field = arg_info.Struct.fields[0];
+                    if (self.req.target.len <= f_decl.name.len) {
+                        return error.NoArgProvided;
+                    }
+                    const str = self.req.target[f_decl.name.len..self.req.target.len];
+                    const field_ti = @typeInfo(field.type);
+                    switch (field_ti) {
+                        // TODO: maybe handle BoundedArray?
+                        .Int => {
+                            @field(arg, field.name) = try std.fmt.parseUnsigned(field.type, str, 16);
+                        },
+                        .Enum => {
+                            @field(arg, field.name) = try parse_enum(field.type, str, 16);
+                        },
+                        else => {
+                            @field(arg, field.name) = str;
+                        },
+                    }
+
+                    try @call(.auto, f, .{ self, arg });
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+
+    pub fn @"/user/"(self: Self, args: struct { username: []const u8 }) !void {
+        const user_ids = try Db.user_ids(self.txn);
+        if (user_ids.get(try Username.fromSlice(args.username))) |user_id| {
+            const users = try Db.users(self.txn);
+            const user = try users.get(user_id);
+
+            const following = try user.following.open(self.txn);
+            const followers = try user.followers.open(self.txn);
+
+            try self.res.write(
+                \\<h2 style="display: inline;"><a href="/user/{s}">{s}</a></h2>
+            , .{
+                user.name.constSlice(), user.display_name.constSlice(),
+            });
+            if (self.logged_in != null and user_id != self.logged_in.?.user.id) {
+                const login = self.logged_in.?;
+
+                // follow/unfollow
+                if (try followers.has(login.user.id)) {
+                    try html_form(self.res, "/follow", .{}, .{
+                        .{ "type=\"hidden\" name=\"user_id\" value=\"{x}\"", .{@intFromEnum(user_id)} },
+                        \\type="submit" value="Unfollow"
+                    });
+                } else {
+                    try html_form(self.res, "/follow", .{}, .{
+                        .{ "type=\"hidden\" name=\"user_id\" value=\"{x}\"", .{@intFromEnum(user_id)} },
+                        \\type="submit" value="Follow"
+                    });
+                }
+
+                // add to feed
+                const feeds_view = try login.user.feeds.open(self.txn);
+                try self.res.write("<form action=\"/feed_add\" method=\"post\">", .{});
+                try self.res.write("<select name=\"feed_id\">", .{});
+                var it = feeds_view.iterator();
+                while (it.next()) |kv| {
+                    const name = kv.val.name;
+                    const id = kv.val.list.idx.?;
+                    try self.res.write("<option value=\"{x}\">{s}</option>", .{ id, name.constSlice() });
+                }
+                try self.res.write("</select>", .{});
+                try self.res.write("<input type=\"hidden\" name=\"user_id\" value=\"{x}\"></input>", .{@intFromEnum(user_id)});
+                try self.res.write("<input type=\"submit\" value=\"Add to feed\"></input>", .{});
+                try self.res.write("</form>", .{});
+            }
+            try self.res.write(
+                \\ <a href="/following/{s}">{} following</a>
+                \\ <a href="/followers/{s}">{} followers</a>
+                \\<br />
+            , .{
+                user.name.constSlice(), following.len(),
+                user.name.constSlice(), followers.len(),
+            });
+
+            if (self.logged_in != null and user_id == self.logged_in.?.user.id) {
+                try self.res.write(
+                    \\<a href="/lists">Lists</a>
+                    \\<a href="/feeds">Feeds</a>
+                    \\<a href="/edit">Edit</a><br />
+                    \\<br />
+                , .{});
+            }
+
+            try self.res.write("<br />", .{});
+
+            try write_posts(self.res, self.txn, self.logged_in, user.posts);
+        } else |err| {
+            try self.res.write(
+                \\<p>User not found [{}]</p>
+            , .{err});
+        }
+    }
+    pub fn @"/following/"(self: Self, args: struct { username: []const u8 }) !void {
+        const user_ids = try Db.user_ids(self.txn);
+        if (user_ids.get(try Username.fromSlice(args.username))) |user_id| {
+            const users = try Db.users(self.txn);
+            const user = try users.get(user_id);
+
+            const following = try user.following.open(self.txn);
+            var it = following.iterator();
+
+            try self.res.write(
+                \\<h2><a href="/user/{s}">{s}</a> follows:</h2>
+            , .{ user.name.constSlice(), user.display_name.constSlice() });
+
+            while (it.next()) |following_id| {
+                const following_user = try users.get(following_id);
+
+                try self.res.write(
+                    \\<a href="/user/{s}">{s}</a><br />
+                , .{ following_user.name.constSlice(), following_user.display_name.constSlice() });
+            }
+        } else |err| {
+            try self.res.write(
+                \\<p>User not found [{}]</p>
+            , .{err});
+        }
+    }
+    pub fn @"/followers/"(self: Self, args: struct { username: []const u8 }) !void {
+        const user_ids = try Db.user_ids(self.txn);
+        if (user_ids.get(try Username.fromSlice(args.username))) |user_id| {
+            const users = try Db.users(self.txn);
+            const user = try users.get(user_id);
+
+            const followers = try user.followers.open(self.txn);
+            var it = followers.iterator();
+
+            try self.res.write(
+                \\<h2><a href="/user/{s}">{s}</a> followers:</h2>
+            , .{ user.name.constSlice(), user.display_name.constSlice() });
+
+            while (it.next()) |follower_id| {
+                const follower_user = try users.get(follower_id);
+
+                try self.res.write(
+                    \\<a href="/user/{s}">{s}</a><br />
+                , .{ follower_user.name.constSlice(), follower_user.display_name.constSlice() });
+            }
+        } else |err| {
+            try self.res.write(
+                \\<p>User not found [{}]</p>
+            , .{err});
+        }
+    }
+    pub fn @"/post/"(self: Self, args: struct { post_id: PostId }) !void {
+        try write_post(self.res, self.txn, self.logged_in, args.post_id, .{
+            .recurse = 3, // TODO: factor out
+            .show_comment_field = true,
+        });
+    }
+    pub fn @"/quotes/"(self: Self, args: struct { post_id: PostId }) !void {
+        const posts = try Db.posts(self.txn);
+        const post = try posts.get(args.post_id);
+
+        const referer = if (self.req.get_header("Referer")) |ref| ref else self.req.target;
+
+        if (self.logged_in != null) {
+            try html_form(self.res, "/quote", .{}, .{
+                .{ "type=\"hidden\" name=\"referer\" value=\"{s}\"", .{referer} },
+                .{ "type=\"hidden\" name=\"post_id\" value=\"{x}\"", .{@intFromEnum(post.id)} },
+                "type=\"text\" name=\"text\" placeholder=\"Text\"",
+                "type=\"submit\" value=\"Quote\"",
+            });
+            try self.res.write("<br />", .{});
+        }
+
+        const quotes_view = try post.quotes.open(self.txn);
+        var it = quotes_view.iterator();
+        while (it.next()) |quote_id| {
+            try write_post(self.res, self.txn, self.logged_in, quote_id, .{ .recurse = 1 });
+            try self.res.write("<br />", .{});
+        }
+    }
+    pub fn @"/list/"(self: Self, args: struct { list_id: PostList.Index }) !void {
+        try write_posts(self.res, self.txn, self.logged_in, PostList{ .idx = args.list_id });
+    }
+    pub fn @"/lists"(self: Self) !void {
+        if (self.logged_in) |login| {
+            const post_lists_view = try login.user.post_lists.open(self.txn);
+
+            try html_form(self.res, "/new_list", .{}, .{
+                "type=\"text\" name=\"name\"",
+                "type=\"submit\" value=\"Add\"",
+            });
+
+            try self.res.write("<br /><br />", .{});
+
+            var it = post_lists_view.iterator();
+            while (it.next()) |kv| {
+                const name = kv.val.name;
+                const post_list = kv.val.list;
+                try self.res.write(
+                    \\<a href="/list/{x}">{s}</a><br />
+                , .{ post_list.idx.?, name.constSlice() });
+            }
+        } else {
+            try self.res.write("not logged in", .{});
+        }
+    }
+    pub fn @"/feed/"(self: Self, args: struct { feed_id: UserList.Index }) !void {
+        try write_timeline(self.res, self.txn, self.logged_in, UserList{ .idx = args.feed_id });
+    }
+    pub fn @"/feeds"(self: Self) !void {
+        if (self.logged_in) |login| {
+            const feeds_view = try login.user.feeds.open(self.txn);
+
+            try html_form(self.res, "/new_feed", .{}, .{
+                "type=\"text\" name=\"name\"",
+                "type=\"submit\" value=\"Add\"",
+            });
+
+            try self.res.write("<br /><br />", .{});
+
+            var it = feeds_view.iterator();
+            while (it.next()) |kv| {
+                const name = kv.val.name;
+                const user_list = kv.val.list;
+                try self.res.write(
+                    \\<a href="/feed/{x}">{s}</a><br />
+                , .{ user_list.idx.?, name.constSlice() });
+            }
+        } else {
+            try self.res.write("not logged in", .{});
+        }
+    }
+    pub fn @"/post"(self: Self) !void {
+        if (self.logged_in) |login| {
+            _ = login;
+            const referer = if (self.req.get_header("Referer")) |ref| ref else self.req.target;
+
+            try html_form(self.res, "/post", .{}, .{
+                .{ "type=\"hidden\" name=\"referer\" value=\"{s}\"", .{referer} },
+                "type=\"text\" name=\"text\"",
+                "type=\"submit\" value=\"Post\"",
+            });
+        } else {
+            try self.res.write("not logged in", .{});
+        }
+    }
+    pub fn @"/edit"(self: Self) !void {
+        if (self.logged_in) |login| {
+            try self.res.write("<br />Username: ", .{});
+            try html_form(self.res, "/set_username", .{}, .{
+                .{ "type=\"text\" name=\"username\" placeholder=\"{s}\"", .{login.user.name.constSlice()} },
+                "type=\"submit\" value=\"Change\"",
+            });
+            try self.res.write("<br />Display Name: ", .{});
+            try html_form(self.res, "/set_display_name", .{}, .{
+                .{ "type=\"text\" name=\"display_name\" placeholder=\"{s}\"", .{login.user.display_name.constSlice()} },
+                "type=\"submit\" value=\"Change\"",
+            });
+            try self.res.write("<br />Password: ", .{});
+            try html_form(self.res, "/set_password", .{}, .{
+                "type=\"text\" name=\"password\"",
+                "type=\"submit\" value=\"Change\"",
+            });
+        } else {
+            try self.res.write("not logged in", .{});
+        }
+    }
+    pub fn @"/"(self: Self) !void {
+        if (self.logged_in) |login| {
+            try write_timeline(self.res, self.txn, self.logged_in, login.user.following);
+        } else {
+            // TODO: generic home
+            try self.res.write("Homepage", .{});
+        }
+    }
+};
+// }}}
+
+// POST {{{
+const POST = struct {
+    const Self = @This();
+
+    env: lmdb.Env,
+    req: *http.Request,
+    res: *http.Response,
+    logged_in: ?Login,
+
+    pub fn handle(self: Self) !bool {
+        const ti = @typeInfo(Self);
+        inline for (ti.Struct.decls) |f_decl| {
+            if (std.mem.eql(u8, f_decl.name, self.req.target)) {
+                const f = @field(Self, f_decl.name);
+                const fi = @typeInfo(@TypeOf(f));
+                if (fi.Fn.params.len == 1) {
+                    _ = try @call(.auto, f, .{self});
+                } else {
+                    const args_type = fi.Fn.params[fi.Fn.params.len - 1].type.?;
+                    const argsi = @typeInfo(args_type);
+                    var args: args_type = undefined;
+                    inline for (argsi.Struct.fields) |field| {
+                        const str = self.req.get_value(field.name) orelse return error.ArgNotFound;
+                        const field_ti = @typeInfo(field.type);
+                        switch (field_ti) {
+                            .Int => {
+                                @field(args, field.name) = try std.fmt.parseUnsigned(field.type, str, 16);
+                            },
+                            .Enum => {
+                                @field(args, field.name) = try parse_enum(field.type, str, 16);
+                            },
+                            else => {
+                                @field(args, field.name) = str;
+                            },
+                        }
+                    }
+                    try @call(.auto, f, .{ self, args });
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+
+    pub fn @"/register"(self: Self, args: struct { username: []const u8, password: []const u8 }) !void {
+        // TODO: handle args not supplied
+        std.debug.print("New user: {s} {s}\n", .{ args.username, args.password });
+        _ = try Chirp.register_user(self.env, args.username, args.password);
+    }
+    pub fn @"/login"(self: Self, args: struct { username: []const u8, password: []const u8 }) !void {
+        // TODO: handle args not supplied
+        std.debug.print("New login: {s} {s}\n", .{ args.username, args.password });
+        if (Chirp.login_user(self.env, args.username, args.password)) |session_token| {
+            self.res.status = .see_other;
+            try self.res.add_header(
+                "Set-Cookie",
+                .{ "session_token={x}; HttpOnly", .{session_token} },
+            );
+        } else |err| {
+            std.debug.print("login_user err: {}\n", .{err});
+        }
+    }
+    pub fn @"/logout"(self: Self) !void {
+        if (self.logged_in) |login| {
+            try Chirp.logout_user(self.env, login.session_token);
+
+            try self.res.add_header(
+                "Set-Cookie",
+                .{"session_token=deleted; Expires=Thu, 01 Jan 1970 00:00:00 GMT"},
+            );
+        }
+    }
+    pub fn @"/set_username"(self: Self, args: struct { username: []const u8 }) !void {
+        const login = self.logged_in orelse return error.NotLoggedIn;
+        const username = try Username.fromSlice(args.username);
+
+        const txn = try self.env.txn();
+        defer txn.commit() catch {};
+
+        const user_ids = try Db.user_ids(txn);
+
+        if (!try user_ids.has(username)) {
+            try user_ids.del(login.user.name);
+            try user_ids.put(username, login.user.id);
+
+            const users = try Db.users(txn);
+            var user = login.user;
+            user.name = username;
+            try users.put(login.user.id, user);
+        }
+    }
+    pub fn @"/set_display_name"(self: Self, args: struct { display_name: []const u8 }) !void {
+        const login = self.logged_in orelse return error.NotLoggedIn;
+        const display_name = try DisplayName.fromSlice(args.display_name);
+
+        const txn = try self.env.txn();
+        defer txn.commit() catch {};
+
+        const users = try Db.users(txn);
+        var user = login.user;
+        user.display_name = display_name;
+        try users.put(login.user.id, user);
+    }
+    pub fn @"/set_password"(self: Self, args: struct { password: []const u8 }) !void {
+        const login = self.logged_in orelse return error.NotLoggedIn;
+
+        const txn = try self.env.txn();
+        defer txn.commit() catch {};
+
+        const users = try Db.users(txn);
+        var user = login.user;
+        user.password_hash = try Chirp.hash_password(args.password);
+        try users.put(login.user.id, user);
+    }
+    pub fn @"/post"(self: Self) !void {
+        if (self.logged_in) |login| {
+            const text = self.req.get_value("text").?;
+            const has_referer = self.req.get_value("referer");
+
+            try Chirp.post(self.env, login.user.id, text);
+
+            if (has_referer) |r| {
+                const decoded = try decode(r);
+                try self.res.redirect(decoded.constSlice());
+            }
+        }
+    }
+    pub fn @"/comment"(self: Self) !void {
+        if (self.logged_in) |login| {
+            const text = self.req.get_value("text") orelse return error.NoText;
+            const post_id_str = self.req.get_value("post_id") orelse return error.NoPostId;
+            const post_id = try parse_enum(PostId, post_id_str, 16);
+
+            try Chirp.comment(self.env, login.user.id, post_id, text);
+        }
+    }
+    pub fn @"/quote"(self: Self) !void {
+        if (self.logged_in) |login| {
+            const text = self.req.get_value("text") orelse return error.NoText;
+            const post_id_str = self.req.get_value("post_id") orelse return error.NoPostId;
+            const has_referer = self.req.get_value("referer");
+
+            const post_id = try parse_enum(PostId, post_id_str, 16);
+
+            try Chirp.quote(self.env, login.user.id, post_id, text);
+
+            if (has_referer) |r| {
+                const decoded = try decode(r);
+                try self.res.redirect(decoded.constSlice());
+            }
+        }
+    }
+    // TODO: add arguments instead of parsing manually
+    pub fn @"/new_list"(self: Self) !void {
+        if (self.logged_in) |login| {
+            const name_str = self.req.get_value("name") orelse return error.NoName;
+            const name = try Name.fromSlice(name_str);
+            // TODO: decode name
+
+            var txn = try self.env.txn();
+
+            const postlist = try PostList.init(txn);
+            try txn.commit();
+
+            txn = try self.env.txn();
+            var post_lists_view = try login.user.post_lists.open(txn);
+            _ = try post_lists_view.append(.{ .name = name, .list = postlist });
+            try txn.commit();
+        }
+    }
+    pub fn @"/list_add"(self: Self) !void {
+        if (self.logged_in) |login| {
+            _ = login;
+
+            const list_id_str = self.req.get_value("list_id") orelse return error.NoListId;
+            const post_id_str = self.req.get_value("post_id") orelse return error.NoPostId;
+            const list_id = try std.fmt.parseUnsigned(PostList.Index, list_id_str, 16);
+            const post_id = try parse_enum(PostId, post_id_str, 16);
+
+            const txn = try self.env.txn();
+            defer txn.commit() catch {};
+
+            const post_list = PostList{ .idx = list_id };
+            var post_list_view = try post_list.open(txn);
+            if (try post_list_view.has(post_id)) {
+                try post_list_view.del(post_id);
+            } else {
+                try post_list_view.append(post_id);
+            }
+        }
+    }
+    pub fn @"/new_feed"(self: Self) !void {
+        if (self.logged_in) |login| {
+            const name_str = self.req.get_value("name") orelse return error.NoName;
+            const name = try Name.fromSlice(name_str);
+
+            var txn = try self.env.txn();
+
+            const userlist = try UserList.init(txn);
+            try txn.commit();
+
+            txn = try self.env.txn();
+            var feeds_view = try login.user.feeds.open(txn);
+            _ = try feeds_view.append(.{ .name = name, .list = userlist });
+            try txn.commit();
+        }
+    }
+    pub fn @"/feed_add"(self: Self) !void {
+        if (self.logged_in) |login| {
+            _ = login;
+
+            const list_id_str = self.req.get_value("feed_id") orelse return error.NoListId;
+            const user_id_str = self.req.get_value("user_id") orelse return error.NoUserId;
+            const list_id = try std.fmt.parseUnsigned(UserList.Index, list_id_str, 16);
+            const user_id = try parse_enum(UserId, user_id_str, 16);
+
+            const txn = try self.env.txn();
+            defer txn.commit() catch {};
+
+            const user_list = UserList{ .idx = list_id };
+            var user_list_view = try user_list.open(txn);
+            if (try user_list_view.has(user_id)) {
+                try user_list_view.del(user_id);
+            } else {
+                try user_list_view.append(user_id);
+            }
+        }
+    }
+    pub fn @"/upvote"(self: Self) !void {
+        const login = self.logged_in orelse return error.NotLoggedIn;
+
+        const post_id_str = self.req.get_value("post_id") orelse return error.NoPostId;
+        const post_id: PostId = @enumFromInt(try std.fmt.parseUnsigned(u64, post_id_str, 16));
+
+        try Chirp.vote(self.env, post_id, login.user.id, .Up);
+    }
+    pub fn @"/downvote"(self: Self) !void {
+        const login = self.logged_in orelse return error.NotLoggedIn;
+
+        const post_id_str = self.req.get_value("post_id") orelse return error.NoPostId;
+        const post_id: PostId = @enumFromInt(try std.fmt.parseUnsigned(u64, post_id_str, 16));
+
+        try Chirp.vote(self.env, post_id, login.user.id, .Down);
+    }
+    pub fn @"/follow"(self: Self) !void {
+        const login = self.logged_in orelse return error.NotLoggedIn;
+
+        const user_id_str = self.req.get_value("user_id") orelse return error.NoUserId;
+        const user_id: UserId = @enumFromInt(try std.fmt.parseUnsigned(u64, user_id_str, 16));
+
+        try Chirp.follow(self.env, login.user.id, user_id);
+    }
+    pub fn @"/quit"(self: Self) !void {
+        if (self.req.get_header("Referer")) |ref| {
+            try self.res.redirect(ref);
+        } else {
+            try self.res.redirect("/");
+        }
+        try self.res.send();
+        // break :accept;
+    }
+};
+// }}}
+
 fn list_users(env: lmdb.Env) !void {
     const txn = try env.txn();
     defer txn.abort();
@@ -810,7 +1357,7 @@ pub fn main() !void {
     std.debug.print("Posts:\n", .{});
     try list_posts(env);
 
-    try handle_connection(&server, &env);
+    try handle_connection(&server, env);
     // const ThreadCount = 1;
     // var ts: [ThreadCount]std.Thread = undefined;
 
@@ -824,18 +1371,19 @@ pub fn main() !void {
     std.debug.print("done\n", .{});
 }
 
-fn handle_connection(server: *http.Server, env: *lmdb.Env) !void {
+fn handle_connection(server: *http.Server, env: lmdb.Env) !void {
     // TODO: static?
     var req_buffer: [ReqBufferSize]u8 = undefined;
     var res_head_buffer: [ResHeadBufferSize]u8 = undefined;
     var res_body_buffer: [ResBodyBufferSize]u8 = undefined;
 
-    accept: while (true) {
+    while (true) {
         server.wait();
 
         while (try server.next_request(&req_buffer)) |*_req| {
             var req: *http.Request = @constCast(_req);
             // std.debug.print("[{}]: {s}\n", .{ req.method, req.target });
+            // std.debug.print("[{}]: {s}\n", .{ req.method, req.head.? });
 
             // reponse
             var res = http.Response.init(req.fd, &res_head_buffer, &res_body_buffer);
@@ -882,298 +1430,28 @@ fn handle_connection(server: *http.Server, env: *lmdb.Env) !void {
                 const txn = try env.txn();
                 defer txn.abort();
 
-                if (std.mem.startsWith(u8, req.target, "/user/")) {
-                    const username = req.target[6..req.target.len];
-
-                    const user_ids = try Db.user_ids(txn);
-                    if (user_ids.get(try Username.fromSlice(username))) |user_id| {
-                        const users = try Db.users(txn);
-                        const user = try users.get(user_id);
-
-                        const following = try user.following.open(txn);
-                        const followers = try user.followers.open(txn);
-
-                        try res.write(
-                            \\<a href="/user/{s}">{s}</a>
-                        , .{
-                            user.name.constSlice(), user.display_name.constSlice(),
-                        });
-                        if (logged_in != null and user_id != logged_in.?.user.id) {
-                            if (try followers.has(logged_in.?.user.id)) {
-                                try html_form(&res, "/follow", .{}, .{
-                                    .{ "type=\"hidden\" name=\"user_id\" value=\"{x}\"", .{@intFromEnum(user_id)} },
-                                    \\type="submit" value="Unfollow"
-                                });
-                            } else {
-                                try html_form(&res, "/follow", .{}, .{
-                                    .{ "type=\"hidden\" name=\"user_id\" value=\"{x}\"", .{@intFromEnum(user_id)} },
-                                    \\type="submit" value="Follow"
-                                });
-                            }
-                        }
-                        try res.write(
-                            \\ <a href="/following/{s}">{} following</a>
-                            \\ <a href="/followers/{s}">{} followers</a>
-                        , .{
-                            user.name.constSlice(), following.len(),
-                            user.name.constSlice(), followers.len(),
-                        });
-
-                        try write_posts(&res, txn, logged_in, user);
-                    } else |err| {
-                        try res.write(
-                            \\<p>User not found [{}]</p>
-                        , .{err});
-                    }
-                } else if (std.mem.startsWith(u8, req.target, "/following/")) {
-                    const username = req.target[11..req.target.len];
-
-                    const user_ids = try Db.user_ids(txn);
-                    if (user_ids.get(try Username.fromSlice(username))) |user_id| {
-                        const users = try Db.users(txn);
-                        const user = try users.get(user_id);
-
-                        const following = try user.following.open(txn);
-                        var it = following.iterator();
-
-                        try res.write(
-                            \\<h2><a href="/user/{s}">{s}</a> follows:</h2>
-                        , .{ user.name.constSlice(), user.display_name.constSlice() });
-
-                        while (it.next()) |kv| {
-                            const following_user = try users.get(kv.key);
-
-                            try res.write(
-                                \\<a href="/user/{s}">{s}</a><br />
-                            , .{ following_user.name.constSlice(), following_user.display_name.constSlice() });
-                        }
-                    } else |err| {
-                        try res.write(
-                            \\<p>User not found [{}]</p>
-                        , .{err});
-                    }
-                } else if (std.mem.startsWith(u8, req.target, "/followers/")) {
-                    const username = req.target[11..req.target.len];
-
-                    const user_ids = try Db.user_ids(txn);
-                    if (user_ids.get(try Username.fromSlice(username))) |user_id| {
-                        const users = try Db.users(txn);
-                        const user = try users.get(user_id);
-
-                        const followers = try user.followers.open(txn);
-                        var it = followers.iterator();
-
-                        try res.write(
-                            \\<h2><a href="/user/{s}">{s}</a> followers:</h2>
-                        , .{ user.name.constSlice(), user.display_name.constSlice() });
-
-                        while (it.next()) |kv| {
-                            const follower_user = try users.get(kv.key);
-
-                            try res.write(
-                                \\<a href="/user/{s}">{s}</a><br />
-                            , .{ follower_user.name.constSlice(), follower_user.display_name.constSlice() });
-                        }
-                    } else |err| {
-                        try res.write(
-                            \\<p>User not found [{}]</p>
-                        , .{err});
-                    }
-                } else if (std.mem.startsWith(u8, req.target, "/post/")) {
-                    const post_id_str = req.target[6..req.target.len];
-                    const post_id = try parse_enum(PostId, post_id_str, 16);
-
-                    try write_post(&res, txn, logged_in, post_id, .Yes);
-                } else if (std.mem.startsWith(u8, req.target, "/quotes/")) {
-                    const post_id_str = req.target[8..req.target.len];
-                    const post_id = try parse_enum(PostId, post_id_str, 16);
-
-                    const posts = try Db.posts(txn);
-                    const post = try posts.get(post_id);
-
-                    const quotes_view = try post.quotes.open(txn);
-                    var it = quotes_view.iterator();
-                    while (it.next()) |kv| {
-                        try write_post(&res, txn, logged_in, kv.key, .Once);
-                        try res.write("<br />", .{});
-                    }
-                } else if (std.mem.eql(u8, req.target, "/post")) {
-                    if (logged_in) |login| {
-                        _ = login;
-                        const referer = if (req.get_header("Referer")) |ref| ref else "/post";
-
-                        try html_form(&res, "/post", .{}, .{
-                            .{ "type=\"hidden\" name=\"referer\" value=\"{s}\"", .{referer} },
-                            "type=\"text\" name=\"text\"",
-                            "type=\"submit\" value=\"Post\"",
-                        });
-                    } else {
-                        try res.write("not logged in", .{});
-                    }
-                } else if (std.mem.eql(u8, req.target, "/edit")) {
-                    if (logged_in) |login| {
-                        try res.write("<br />Username: ", .{});
-                        try html_form(&res, "/set_username", .{}, .{
-                            .{ "type=\"text\" name=\"username\" placeholder=\"{s}\"", .{login.user.name.constSlice()} },
-                            "type=\"submit\" value=\"Change\"",
-                        });
-                        try res.write("<br />Display Name: ", .{});
-                        try html_form(&res, "/set_display_name", .{}, .{
-                            .{ "type=\"text\" name=\"display_name\" placeholder=\"{s}\"", .{login.user.display_name.constSlice()} },
-                            "type=\"submit\" value=\"Change\"",
-                        });
-                        try res.write("<br />Password: ", .{});
-                        try html_form(&res, "/set_password", .{}, .{
-                            "type=\"text\" name=\"password\"",
-                            "type=\"submit\" value=\"Change\"",
-                        });
-                    } else {
-                        try res.write("not logged in", .{});
-                    }
-                } else if (std.mem.eql(u8, req.target, "/")) {
-                    if (logged_in) |login| {
-                        try write_timeline(&res, txn, logged_in, login.user);
-                    } else {
-                        // TODO: generic home
-                        try res.write("Homepage", .{});
-                    }
-                } else {
+                const get = GET{
+                    .txn = txn,
+                    .req = req,
+                    .res = &res,
+                    .logged_in = logged_in,
+                };
+                if (try get.handle()) {} else {
                     try res.redirect("/");
                 }
+
                 try write_end(&res);
                 try res.send();
             }
             // api
             else {
-                if (std.mem.eql(u8, req.target, "/register")) {
-                    // TODO: handle args not supplied
-                    const username = req.get_value("username").?;
-                    const password = req.get_value("password").?;
-
-                    std.debug.print("New user: {s} {s}\n", .{ username, password });
-                    _ = try Chirp.register_user(env, username, password);
-                } else if (std.mem.eql(u8, req.target, "/login")) {
-                    // TODO: handle args not supplied
-                    const username = req.get_value("username").?;
-                    const password = req.get_value("password").?;
-
-                    std.debug.print("New login: {s} {s}\n", .{ username, password });
-                    if (Chirp.login_user(env, username, password)) |session_token| {
-                        res.status = .see_other;
-                        try res.add_header(
-                            "Set-Cookie",
-                            .{ "session_token={x}; HttpOnly", .{session_token} },
-                        );
-                    } else |err| {
-                        std.debug.print("login_user err: {}\n", .{err});
-                    }
-                } else if (std.mem.eql(u8, req.target, "/logout")) {
-                    if (logged_in) |login| {
-                        try Chirp.logout_user(env, login.session_token);
-
-                        try res.add_header(
-                            "Set-Cookie",
-                            .{"session_token=deleted; Expires=Thu, 01 Jan 1970 00:00:00 GMT"},
-                        );
-                    }
-                } else if (std.mem.eql(u8, req.target, "/set_username")) {
-                    const login = logged_in orelse return error.NotLoggedIn;
-                    const username_str = req.get_value("username") orelse return error.NoUsername;
-                    const username = try Username.fromSlice(username_str);
-
-                    const txn = try env.txn();
-                    defer txn.commit() catch {};
-
-                    const user_ids = try Db.user_ids(txn);
-
-                    if (!try user_ids.has(username)) {
-                        try user_ids.del(login.user.name);
-                        try user_ids.put(username, login.user.id);
-
-                        const users = try Db.users(txn);
-                        var user = login.user;
-                        user.name = username;
-                        try users.put(login.user.id, user);
-                    }
-                } else if (std.mem.eql(u8, req.target, "/set_display_name")) {
-                    const login = logged_in orelse return error.NotLoggedIn;
-                    const display_name_str = req.get_value("display_name") orelse return error.NoDisplayName;
-                    const display_name = try DisplayName.fromSlice(display_name_str);
-
-                    const txn = try env.txn();
-                    defer txn.commit() catch {};
-
-                    const users = try Db.users(txn);
-                    var user = login.user;
-                    user.display_name = display_name;
-                    try users.put(login.user.id, user);
-                } else if (std.mem.eql(u8, req.target, "/set_password")) {
-                    const login = logged_in orelse return error.NotLoggedIn;
-                    const password_str = req.get_value("password") orelse return error.NoPassword;
-
-                    const txn = try env.txn();
-                    defer txn.commit() catch {};
-
-                    const users = try Db.users(txn);
-                    var user = login.user;
-                    user.password_hash = try Chirp.hash_password(password_str);
-                    try users.put(login.user.id, user);
-                } else if (std.mem.eql(u8, req.target, "/post")) {
-                    if (logged_in) |login| {
-                        const text = req.get_value("text").?;
-                        const has_referer = req.get_value("referer");
-                        try Chirp.post(env, login.user.id, text);
-                        if (has_referer) |r| {
-                            const decoded = try decode(r);
-                            try res.redirect(decoded.constSlice());
-                        }
-                    }
-                } else if (std.mem.eql(u8, req.target, "/comment")) {
-                    if (logged_in) |login| {
-                        const text = req.get_value("text") orelse return error.NoText;
-                        const post_id_str = req.get_value("post_id") orelse return error.NoPostId;
-                        const post_id = try parse_enum(PostId, post_id_str, 16);
-
-                        try Chirp.comment(env, login.user.id, post_id, text);
-                    }
-                } else if (std.mem.eql(u8, req.target, "/quote")) {
-                    if (logged_in) |login| {
-                        const text = req.get_value("text") orelse return error.NoText;
-                        const post_id_str = req.get_value("post_id") orelse return error.NoPostId;
-                        const post_id = try parse_enum(PostId, post_id_str, 16);
-
-                        try Chirp.quote(env, login.user.id, post_id, text);
-                    }
-                } else if (std.mem.eql(u8, req.target, "/upvote")) {
-                    const login = logged_in orelse return error.NotLoggedIn;
-
-                    const post_id_str = req.get_value("post_id") orelse return error.NoPostId;
-                    const post_id: PostId = @enumFromInt(try std.fmt.parseUnsigned(u64, post_id_str, 16));
-
-                    try Chirp.vote(env, post_id, login.user.id, .Up);
-                } else if (std.mem.eql(u8, req.target, "/downvote")) {
-                    const login = logged_in orelse return error.NotLoggedIn;
-
-                    const post_id_str = req.get_value("post_id") orelse return error.NoPostId;
-                    const post_id: PostId = @enumFromInt(try std.fmt.parseUnsigned(u64, post_id_str, 16));
-
-                    try Chirp.vote(env, post_id, login.user.id, .Down);
-                } else if (std.mem.eql(u8, req.target, "/follow")) {
-                    const login = logged_in orelse return error.NotLoggedIn;
-
-                    const user_id_str = req.get_value("user_id") orelse return error.NoUserId;
-                    const user_id: UserId = @enumFromInt(try std.fmt.parseUnsigned(u64, user_id_str, 16));
-
-                    try Chirp.follow(env, login.user.id, user_id);
-                } else if (std.mem.eql(u8, req.target, "/quit")) {
-                    if (req.get_header("Referer")) |ref| {
-                        try res.redirect(ref);
-                    } else {
-                        try res.redirect("/");
-                    }
-                    try res.send();
-                    break :accept;
-                } else {
+                const post = POST{
+                    .env = env,
+                    .req = req,
+                    .res = &res,
+                    .logged_in = logged_in,
+                };
+                if (try post.handle()) {} else {
                     try res.write("<p>[POST] {s}</p>", .{req.target});
                 }