168 lines
6.9 KiB
Crystal
168 lines
6.9 KiB
Crystal
require "http"
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module Telepathy
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class Bot
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enum Control
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Done
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end
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enum ParseMode
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Normal, Markdown, HTML
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end
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def initialize(@api_token : String)
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@request_base = "https://api.telegram.org/bot#{@api_token}"
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@this_user = uninitialized User?
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@this_user = get_me
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@last_update_id = uninitialized Int64?
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@last_update_id = nil
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@command_hooks = {} of String => Update, Array(String) -> Void
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@message_hooks = [] of Update -> Void
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@poll_channel = Channel(Int64?|Control).new
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@update_channel = Channel(Array(Update)|Control).new
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@poll_running = false
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end
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def get_me
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response = HTTP::Client.get(@request_base + "/getMe",
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headers: HTTP::Headers{"User-agent" => "Telepathy"})
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return Response(User).from_json(response.body).result
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end
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def get_updates(timeout = 0)
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update_data = {} of String => Int64 | Int32 | String
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update_data["timeout"] = timeout
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@last_update_id.try { |id| update_data["offset"] = id }
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response = HTTP::Client.get(@request_base + "/getUpdates",
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headers: HTTP::Headers{"User-agent" => "Telepathy", "Content-type" => "application/json" },
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body: update_data.to_json)
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return Response(Array(Update)).from_json(response.body).result
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end
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def send_message(chat_id : String | Int64, text : String,
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parse_mode : ParseMode = ParseMode::Normal,
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disable_web_preview : Bool = false,
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disable_notification : Bool = false,
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reply_to_message_id : Int64? = nil)
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message_data = { "chat_id" => chat_id, "text" => text } of String => Int64 | String | Bool
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message_data["disable_web_preview"] = true if disable_web_preview
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message_data["disable_notification"] = true if disable_notification
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if parse_mode == ParseMode::Markdown
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message_data["parse_mode"] = "Markdown"
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elsif parse_mode == ParseMode::HTML
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message_data["parse_mode"] = "HTML"
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end
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reply_to_message_id.try { |id| message_data["reply_to_message_id"] = id }
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HTTP::Client.get(@request_base + "/sendMessage",
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headers: HTTP::Headers{"User-agent" => "Telepathy", "Content-type" => "application/json" },
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body: message_data.to_json)
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end
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def send_photo(chat_id : String | Int64, photo : String | File, caption : String? = nil,
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disable_notification : Bool = false,
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reply_to_message_id : Int64? = nil)
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IO.pipe do |reader, writer|
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channel = Channel(String).new(1)
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spawn do
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HTTP::FormData.build(writer) do |formdata|
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channel.send(formdata.content_type)
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case chat_id
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when String
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formdata.field("chat_id", chat_id.as(String))
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when Int64
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formdata.field("chat_id", chat_id.as(Int64).to_s)
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end
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formdata.field("disable_notification", disable_notification.to_s)
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caption.try { |caption| formdata.field("caption", caption) }
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reply_to_message_id.try { |id| formdata.field("reply_to_message_id", id) }
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case photo
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when String
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formdata.field("photo", photo.as(String))
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when File
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photo_file = photo.as(File)
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formdata.file("photo", photo_file,
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HTTP::FormData::FileMetadata.new(filename: File.basename(photo_file.path)))
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end
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end
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writer.close
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end
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response = HTTP::Client.get(@request_base + "/sendPhoto",
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headers: HTTP::Headers{"User-agent" => "Telepathy", "Content-type" => channel.receive },
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body: reader)
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end
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end
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def command(command_name, &block: Update, Array(String) -> Void)
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@command_hooks[command_name] = block
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end
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def message(&block: Update -> Void)
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@message_hooks.push(block)
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end
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private def process_updates(updates)
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updates.each do |update|
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if message = update.message
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@message_hooks.each &.call(update)
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if entity = message.entities.try { |it| it.first? }
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text = message.text.as String
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if entity.offset == 0 && entity.type == "bot_command"
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divider_index = (text.index /\s|@/) || text.size
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first_space_index = (text.index /\s/) || text.size
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command = text[1...divider_index]
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remaining = text[first_space_index..text.size]
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params = remaining.empty? ? ([] of String) : (remaining[1...remaining.size].split ' ')
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@command_hooks[command]?.try { |command| command.call(update, params) }
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end
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end
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end
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end
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end
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private def spawn_workers
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spawn do
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loop do
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action = @poll_channel.receive
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case action
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when Int64?
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@last_update_id = action.nil? ? @last_update_id : action + 1
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@update_channel.send get_updates 10
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when Control
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break
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end
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end
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end
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spawn do
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loop do
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item = @update_channel.receive
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case item
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when Array(Update)
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process_updates(item)
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@poll_channel.send item.last?.try &.update_id
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when Control
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@poll_channel.send item
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break
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end
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end
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end
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end
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def poll
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if !@poll_running
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@poll_running = true
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spawn_workers
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@poll_channel.send nil
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end
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end
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def end_poll
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if @poll_running
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@poll_running = false
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@poll_channel.send Control::Done
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end
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end
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end
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end
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