ewe

-module(ewe).
-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).
-define(FILEPATH, "src/ewe.gleam").
-export([client_stats/1, ip_address_to_string/1, new/1, bind/2, bind_all/1, with_port/2, with_ipv6/1, with_tls/3, on_start/2, start/1, supervised/1, read_body/2]).
-export_type([ip_address/0, builder/0, body_error/0]).

-if(?OTP_RELEASE >= 27).
-define(MODULEDOC(Str), -moduledoc(Str)).
-define(DOC(Str), -doc(Str)).
-else.
-define(MODULEDOC(Str), -compile([])).
-define(DOC(Str), -compile([])).
-endif.

-type ip_address() :: {ip_v4, integer(), integer(), integer(), integer()} |
    {ip_v6,
        integer(),
        integer(),
        integer(),
        integer(),
        integer(),
        integer(),
        integer(),
        integer()}.

-opaque builder() :: {builder,
        fun((gleam@http@request:request(ewe@internal@http:connection())) -> gleam@http@response:response(gleam@bytes_tree:bytes_tree())),
        integer(),
        binary(),
        boolean(),
        gleam@option:option({binary(), binary()}),
        fun((gleam@http:scheme(), ip_address(), integer()) -> nil)}.

-type body_error() :: body_too_large | invalid_body.

-file("src/ewe.gleam", 45).
-spec glisten_to_ewe_ip(glisten:ip_address()) -> ip_address().
glisten_to_ewe_ip(Ip) ->
    case Ip of
        {ip_v4, N1, N2, N3, N4} ->
            {ip_v4, N1, N2, N3, N4};

        {ip_v6, N1@1, N2@1, N3@1, N4@1, N5, N6, N7, N8} ->
            {ip_v6, N1@1, N2@1, N3@1, N4@1, N5, N6, N7, N8}
    end.

-file("src/ewe.gleam", 53).
-spec glisten_options_to_ewe_ip(glisten@socket@options:ip_address()) -> ip_address().
glisten_options_to_ewe_ip(Ip) ->
    case Ip of
        {ip_v4, N1, N2, N3, N4} ->
            {ip_v4, N1, N2, N3, N4};

        {ip_v6, N1@1, N2@1, N3@1, N4@1, N5, N6, N7, N8} ->
            {ip_v6, N1@1, N2@1, N3@1, N4@1, N5, N6, N7, N8}
    end.

-file("src/ewe.gleam", 37).
?DOC(" Performs an attempt to get the client's IP address and port.\n").
-spec client_stats(ewe@internal@http:connection()) -> {ok,
        {ip_address(), integer()}} |
    {error, nil}.
client_stats(Connection) ->
    _pipe = glisten@transport:peername(
        erlang:element(2, Connection),
        erlang:element(3, Connection)
    ),
    gleam@result:map(
        _pipe,
        fun(Tuple) ->
            {Ip, Port} = Tuple,
            {glisten_options_to_ewe_ip(Ip), Port}
        end
    ).

-file("src/ewe.gleam", 61).
-spec ewe_to_glisten_ip(ip_address()) -> glisten:ip_address().
ewe_to_glisten_ip(Ip) ->
    case Ip of
        {ip_v4, N1, N2, N3, N4} ->
            {ip_v4, N1, N2, N3, N4};

        {ip_v6, N1@1, N2@1, N3@1, N4@1, N5, N6, N7, N8} ->
            {ip_v6, N1@1, N2@1, N3@1, N4@1, N5, N6, N7, N8}
    end.

-file("src/ewe.gleam", 31).
?DOC(" Converts an `IpAddress` to a string for later printing.\n").
-spec ip_address_to_string(ip_address()) -> binary().
ip_address_to_string(Address) ->
    _pipe = ewe_to_glisten_ip(Address),
    glisten:ip_address_to_string(_pipe).

-file("src/ewe.gleam", 96).
?DOC(
    " Creates new server builder with handler provided.\n"
    " \n"
    " Default configuration:\n"
    " - port: `8080`\n"
    " - interface: `127.0.0.1`\n"
    " - No ipv6 support\n"
    " - No TLS support\n"
    " - on_start: prints `Listening on <scheme>://<ip_address>:<port>`\n"
).
-spec new(
    fun((gleam@http@request:request(ewe@internal@http:connection())) -> gleam@http@response:response(gleam@bytes_tree:bytes_tree()))
) -> builder().
new(Handler) ->
    {builder,
        Handler,
        8080,
        <<"127.0.0.1"/utf8>>,
        false,
        none,
        fun(Scheme, Ip_address, Port) ->
            Address = case Ip_address of
                {ip_v6, _, _, _, _, _, _, _, _} ->
                    <<<<"["/utf8, (ip_address_to_string(Ip_address))/binary>>/binary,
                        "]"/utf8>>;

                {ip_v4, _, _, _, _} ->
                    ip_address_to_string(Ip_address)
            end,
            Url = <<<<<<<<(gleam@http:scheme_to_string(Scheme))/binary,
                            "://"/utf8>>/binary,
                        Address/binary>>/binary,
                    ":"/utf8>>/binary,
                (erlang:integer_to_binary(Port))/binary>>,
            gleam_stdlib:println(<<"Listening on "/utf8, Url/binary>>)
        end}.

-file("src/ewe.gleam", 122).
?DOC(" Binds server to a specific interface. Crashes program if interface is invalid.\n").
-spec bind(builder(), binary()) -> builder().
bind(Builder, Interface) ->
    {builder,
        erlang:element(2, Builder),
        erlang:element(3, Builder),
        Interface,
        erlang:element(5, Builder),
        erlang:element(6, Builder),
        erlang:element(7, Builder)}.

-file("src/ewe.gleam", 127).
?DOC(" Binds server to all interfaces.\n").
-spec bind_all(builder()) -> builder().
bind_all(Builder) ->
    {builder,
        erlang:element(2, Builder),
        erlang:element(3, Builder),
        <<"0.0.0.0"/utf8>>,
        erlang:element(5, Builder),
        erlang:element(6, Builder),
        erlang:element(7, Builder)}.

-file("src/ewe.gleam", 132).
?DOC(" Sets listening port for server.\n").
-spec with_port(builder(), integer()) -> builder().
with_port(Builder, Port) ->
    {builder,
        erlang:element(2, Builder),
        Port,
        erlang:element(4, Builder),
        erlang:element(5, Builder),
        erlang:element(6, Builder),
        erlang:element(7, Builder)}.

-file("src/ewe.gleam", 137).
?DOC(" Enables IPv6 support.\n").
-spec with_ipv6(builder()) -> builder().
with_ipv6(Builder) ->
    {builder,
        erlang:element(2, Builder),
        erlang:element(3, Builder),
        erlang:element(4, Builder),
        true,
        erlang:element(6, Builder),
        erlang:element(7, Builder)}.

-file("src/ewe.gleam", 142).
?DOC(" Enables TLS support, requires certificate and key file.\n").
-spec with_tls(builder(), binary(), binary()) -> builder().
with_tls(Builder, Certificate, Keyfile) ->
    Cert = case ewe@internal@file:open(Certificate) of
        {ok, _} ->
            Certificate;

        {error, _} ->
            erlang:error(#{gleam_error => panic,
                    message => <<"Failed to find cert file"/utf8>>,
                    file => <<?FILEPATH/utf8>>,
                    module => <<"ewe"/utf8>>,
                    function => <<"with_tls"/utf8>>,
                    line => 149})
    end,
    Key = case ewe@internal@file:open(Keyfile) of
        {ok, _} ->
            Keyfile;

        {error, _} ->
            erlang:error(#{gleam_error => panic,
                    message => <<"Failed to find key file"/utf8>>,
                    file => <<?FILEPATH/utf8>>,
                    module => <<"ewe"/utf8>>,
                    function => <<"with_tls"/utf8>>,
                    line => 154})
    end,
    {builder,
        erlang:element(2, Builder),
        erlang:element(3, Builder),
        erlang:element(4, Builder),
        erlang:element(5, Builder),
        {some, {Cert, Key}},
        erlang:element(7, Builder)}.

-file("src/ewe.gleam", 161).
?DOC(" Sets a custom handler that will be called after server starts.\n").
-spec on_start(
    builder(),
    fun((gleam@http:scheme(), ip_address(), integer()) -> nil)
) -> builder().
on_start(Builder, On_start) ->
    {builder,
        erlang:element(2, Builder),
        erlang:element(3, Builder),
        erlang:element(4, Builder),
        erlang:element(5, Builder),
        erlang:element(6, Builder),
        On_start}.

-file("src/ewe.gleam", 169).
?DOC(" Starts the server.\n").
-spec start(builder()) -> {ok,
        gleam@otp@actor:started(gleam@otp@static_supervisor:supervisor())} |
    {error, gleam@otp@actor:start_error()}.
start(Builder) ->
    Name = gleam_erlang_ffi:new_name(<<"ewe_glisten"/utf8>>),
    _pipe@2 = glisten:new(
        fun(Conn) -> {ewe@internal@http:transform_connection(Conn), none} end,
        fun(Http_conn, Msg, Conn@1) ->
            Msg@2 = case Msg of
                {packet, Msg@1} -> Msg@1;
                _assert_fail ->
                    erlang:error(#{gleam_error => let_assert,
                                message => <<"Pattern match failed, no pattern matched the value."/utf8>>,
                                file => <<?FILEPATH/utf8>>,
                                module => <<"ewe"/utf8>>,
                                function => <<"start"/utf8>>,
                                line => 177,
                                value => _assert_fail,
                                start => 4867,
                                'end' => 4903,
                                pattern_start => 4878,
                                pattern_end => 4897})
            end,
            case ewe@internal@http:parse_request(Http_conn, Msg@2) of
                {ok, {parsed_request, Request, Version}} ->
                    Resp = begin
                        _pipe = (erlang:element(2, Builder))(Request),
                        _pipe@1 = ewe@internal@response:append_default_headers(
                            _pipe,
                            Version
                        ),
                        ewe@internal@response:encode(_pipe@1)
                    end,
                    case glisten@transport:send(
                        erlang:element(3, Conn@1),
                        erlang:element(2, Conn@1),
                        Resp
                    ) of
                        {ok, nil} ->
                            glisten:continue(Http_conn);

                        {error, _} ->
                            glisten:stop()
                    end;

                {error, _} ->
                    glisten:stop()
            end
        end
    ),
    _pipe@3 = glisten:bind(_pipe@2, erlang:element(4, Builder)),
    _pipe@4 = (fun(Glisten_builder) -> case erlang:element(5, Builder) of
            true ->
                glisten:with_ipv6(Glisten_builder);

            false ->
                Glisten_builder
        end end)(_pipe@3),
    _pipe@5 = (fun(Glisten_builder@1) -> case erlang:element(6, Builder) of
            {some, {Cert, Key}} ->
                glisten:with_tls(Glisten_builder@1, Cert, Key);

            none ->
                Glisten_builder@1
        end end)(_pipe@4),
    _pipe@6 = glisten:start_with_listener_name(
        _pipe@5,
        erlang:element(3, Builder),
        Name
    ),
    gleam@result:map(
        _pipe@6,
        fun(Started) ->
            Scheme = case erlang:element(6, Builder) of
                {some, {_, _}} ->
                    https;

                none ->
                    http
            end,
            Server_info = glisten:get_server_info(Name, 10000),
            Ip_address = glisten_to_ewe_ip(erlang:element(3, Server_info)),
            (erlang:element(7, Builder))(
                Scheme,
                Ip_address,
                erlang:element(2, Server_info)
            ),
            Started
        end
    ).

-file("src/ewe.gleam", 224).
?DOC(" Creates a supervisor that can be appended to a supervision tree.\n").
-spec supervised(builder()) -> gleam@otp@supervision:child_specification(gleam@otp@static_supervisor:supervisor()).
supervised(Builder) ->
    gleam@otp@supervision:supervisor(fun() -> start(Builder) end).

-file("src/ewe.gleam", 240).
?DOC(
    " Reads body from a request. If request body is malformed, `InvalidBody` error is returned. On success, returns a request with body converted to `BitArray`.\n"
    " - When `transfer-encoding` header set as `chunked`, `BodyTooLarge` error is returned if\n"
    " accumulated body is larger than `size_limit`.\n"
    " - Ensures that `content-length` is in `size_limit` scope.\n"
).
-spec read_body(
    gleam@http@request:request(ewe@internal@http:connection()),
    integer()
) -> {ok, gleam@http@request:request(bitstring())} | {error, body_error()}.
read_body(Req, Size_limit) ->
    case ewe@internal@http:read_body(Req, Size_limit) of
        {ok, Req@1} ->
            {ok, Req@1};

        {error, body_too_large} ->
            {error, body_too_large};

        {error, _} ->
            {error, invalid_body}
    end.