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# coding: utf-8
# Copyright 2019 DragonRuby LLC
# MIT License
# hotload_client.rb has been released under MIT (*only this file*).
module GTK
class RemoteHotloadClient
attr :args
def gtk
args.gtk
end
def state
local_state
end
def initialize local_ip_address
local_state.local_ip_address = local_ip_address
end
def tick
return unless server_available?
return unless server_needed?
if should_tick? && server_needed? && !local_state.notified
if server_available?
remote_log "* REMOTE CLIENT INFO: Hotload server found at #{get_server_ip_address}:9001."
end
local_state.notified = true
end
tick_process_file_retrieval
tick_process_queue
tick_changes
tick_http_boot
end
def should_tick?
(game_state.tick_count.mod_zero? 60) && game_state.tick_count > 5.seconds
end
def game_state
args.state
end
def local_state
@local_state ||= OpenEntity.new
@local_state.hotload_client ||= @local_state.new_entity(:hotload_client,
notes: "This enitity is used by DragonRuby Game Toolkit to provide you hotloading on remote machines.",
changes: { },
changes_queue: [],
reloaded_files_times: [])
@local_state.hotload_client
end
def remote_log message
log message
args.gtk.http_post "http://#{get_server_ip_address}:9001/dragon/log/", { message: "=======\n#{message}\n=======\n" }, ["Content-Type: application/x-www-form-urlencoded"]
end
def get_server_ip_address
return local_state.ip_address if local_state.ip_address
local_state.ip_address ||= ((gtk.read_file 'app/server_ip_address.txt') || "").strip
local_state.ip_address
end
def server_available?
return false if gtk.platform == 'Emscripten'
get_server_ip_address.length != 0
end
def server_needed?
return false if gtk.platform == 'Emscripten'
local_state.local_ip_address != get_server_ip_address
end
def tick_changes
return unless should_tick?
local_state.greatest_tick ||= 0
local_state.last_greatest_tick ||= 0
tick_http_changes
end
def tick_http_boot
return if local_state.booted_at
if !local_state.http_boot
# first retrieve changes.txt which has the following format
# file with latest change,
# latest file update_time key
# tmp/src_backup/src_backup_app_main.rb, 1597926596, app/main.rb
local_state.http_boot = args.gtk.http_get "http://#{get_server_ip_address}:9001/dragon/boot/"
elsif local_state.http_boot && local_state.http_boot[:http_response_code] == 200
local_state.last_greatest_tick = local_state.http_boot[:response_data].strip.to_i
local_state.greatest_tick = local_state.http_boot[:response_data].strip.to_i
local_state.booted_at = local_state.greatest_tick
remote_log '* REMOTE CLIENT INFO: HTTP GET for local_state. boot.txt succeeded.'
remote_log "* REMOTE CLIENT INFO: Looking for changes after: #{local_state.greatest_tick}."
elsif local_state.http_boot && local_state.http_boot[:http_response_code] == -1 && local_state.http_boot[:complete]
remote_log '* REMOTE CLIENT INFO: HTTP GET for boot.txt failed. Retrying.'
local_state.http_boot = nil
end
end
def tick_http_changes
return unless local_state.booted_at
if !local_state.http_changes
local_state.http_changes = args.gtk.http_get "http://#{get_server_ip_address}:9001/dragon/changes/"
end
if local_state.http_changes && local_state.http_changes[:http_response_code] == 200 && local_state.booted_at
local_state.last_greatest_tick = local_state.greatest_tick
# if the retrieval of changes.txt was successful
local_state.http_changes[:response_data].each_line do |l|
if l.strip.length != 0
# within reload state for that specific changes hash
# set the last time the file was updated
file_name, updated_at, key = l.strip.split(',')
file_name.strip!
updated_at.strip!
key.strip!
updated_at = updated_at.to_i
file_name = file_name.gsub("tmp/src_backup/", "")
# keep an internal clock that denotes that current time on the
# dev machine
if updated_at > local_state.greatest_tick
local_state.greatest_tick = updated_at
# create a new entry in change tracking for the file
# for every file where the file was last updated, find all the ones where the time is not the same
# and queue those to be retrieved and required
# if the last time the dev machine time was retrieved is less than the file time changed
# then queue the file for reload
current_updated_at = (local_state.changes[key] || { updated_at: 0 })[:updated_at]
if updated_at > current_updated_at
remote_log "* REMOTE CLIENT INFO: Queueing file #{file_name} for update."
local_state.changes[key] = { key: key,
latest_file: file_name,
updated_at: updated_at }
local_state.changes_queue << local_state.changes[key]
end
end
end
end
# set the greatest tick/current time of the machine
local_state.http_changes = nil
elsif local_state.http_changes && local_state.http_changes[:http_response_code] == -1 && local_state.http_change[:complete] && local_state.booted_at
local_state.http_changes = nil
end
end
def tick_process_queue
return if local_state.http_file_changes # don't pop a file off the queue if there is an http request in flight
return if local_state.processing_file_changes # don't pop a file if there is a file currently being processed
return unless local_state.changes_queue.length > 0 # return if the queue is empty
# if it isn't empty, pop the first file off the queue (FIFO)
local_state.processing_file_changes = local_state.changes_queue.shift
# create an http request for the file
url = "http://#{get_server_ip_address}:9001/dragon/#{local_state.processing_file_changes[:latest_file]}"
remote_log "* REMOTE CLIENT INFO: Getting new version of #{local_state.processing_file_changes[:latest_file]} (#{url})."
local_state.http_file_changes = args.gtk.http_get url
end
def tick_process_file_retrieval
return if !local_state.http_file_changes
# if the http request has finished successfully
if local_state.http_file_changes[:http_response_code] == 200
file_key = local_state.processing_file_changes[:key]
# notify that a file will be reloaded
remote_log "* REMOTE CLIENT INFO: Loading #{file_key}: #{local_state.processing_file_changes[:latest_file]}"
remote_log "#{local_state.http_file_changes[:response_data]}"
# write the latest file with what came back from the response data
gtk.write_file "#{file_key}", local_state.http_file_changes[:response_data]
# nil out the currently processing file so a new item can be processed from the queue
# local_state.reloaded_files_times << local_state.processing_file_changes[:key]
local_state.http_file_changes = nil
local_state.processing_file_changes = nil
end
end
end
end
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