xbot/driver/web.hpp

#pragma once

#include <myirc/connection.hpp>

#include <toml++/toml.hpp>

#include <boost/asio.hpp>
#include <boost/signals2.hpp>

#include <memory>
#include <map>
#include <set>

struct ProjectSettings {
    // *** Administrative settings ***

    // IRC channel to announce to
    std::string channel;

    // name extracted from notify/$user
    std::string credential_name;

    // Authorized accounts can edit the event list
    std::set<std::string> authorized_accounts;

    // *** User settings ***

    // Events to announce
    std::set<std::string> events;

    // Whether to announce events
    bool enabled;

    auto to_toml() const -> toml::table;
    static auto from_toml(const toml::table &v) -> ProjectSettings;
};

struct WebhookSettings {
    std::string host;
    std::string service;

    std::map<std::string, std::string> credentials;
    std::map<std::string, ProjectSettings> projects;

    auto to_toml() const -> toml::table;
    static auto from_toml(const toml::table &v) -> WebhookSettings;
};

struct WebhookEvent {
    std::string channel;
    std::string message;
};

class GithubWebhook {
    // IRC connection to announce on; could be empty
    std::shared_ptr<myirc::Connection> connection_;

    // Buffered events in case connection was inactive when event was received
    std::vector<WebhookEvent> events_;


    // Actually write the event to the connection.
    // Only call when there is a connection.
    auto write_event(WebhookEvent event) -> void;

public:
    WebhookSettings settings_;

    GithubWebhook(WebhookSettings settings)
        : settings_(std::move(settings))
    {
    }

    // Either emit the event now or save it until a connection is set
    auto add_event(WebhookEvent event) -> void
    {
        if (connection_) {
            write_event(std::move(event));
        } else {
            events_.emplace_back(std::move(event));
        }
    }

    auto set_connection(std::shared_ptr<myirc::Connection> connection) -> void
    {
        connection_ = std::move(connection);
        for (auto &&event : events_)
        {
            write_event(event);
        }
        events_.clear();
    }

    auto clear_connection() -> void
    {
        connection_.reset();
    }
};

auto start_webhook(boost::asio::io_context &io, const char *) -> std::shared_ptr<GithubWebhook>;