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# File 'lib/isomorfeus/preact_view_helper.rb', line 19
def mount_component(component_name, props = {}, asset_key = 'ssr.js')
@ssr_response_status = nil
@ssr_styles = nil
thread_id_asset = "#{Thread.current.object_id}#{asset_key}"
render_result = "<div data-iso-env=\"#{Isomorfeus.env}\" data-iso-root=\"#{component_name}\" data-iso-props='#{Oj.dump(props, mode: :strict)}'"
if Isomorfeus.server_side_rendering
if Isomorfeus.development?
if Isomorfeus.ssr_contexts.key?(thread_id_asset)
uuid = Isomorfeus.ssr_contexts[thread_id_asset].instance_variable_get(:@uuid)
runtime = Isomorfeus.ssr_contexts[thread_id_asset].instance_variable_get(:@runtime)
runtime.vm.delete_context(uuid)
end
begin
asset = Isomorfeus.assets[asset_key]
raise "#{self.class.name}: Asset not found: #{asset_key}" unless asset
asset_manager.transition(asset_key, asset)
Isomorfeus.ssr_contexts[thread_id_asset] = ExecJS.permissive_compile(asset.bundle)
rescue Exception => e
Isomorfeus.raise_error(message: "Server Side Rendering: Failed creating context for #{asset_key}. Error: #{e.message}", stack: e.backtrace)
end
else
unless Isomorfeus.ssr_contexts.key?(thread_id_asset)
asset = Isomorfeus.assets[asset_key]
raise "#{self.class.name}: Asset not found: #{asset_key}" unless asset
asset_manager.transition(asset_key, asset)
Isomorfeus.ssr_contexts[thread_id_asset] = ExecJS.permissive_compile(asset.bundle)
end
end
javascript = " global.Opal.Preact.render_buffer = [];\n global.Opal.Preact.active_components = [];\n global.Opal.Preact.active_redux_components = [];\n global.FirstPassFinished = false;\n global.Exception = false;\n global.IsomorfeusSessionId = '\#{Thread.current[:isomorfeus_session_id]}';\n global.Opal.Isomorfeus['$env=']('\#{Isomorfeus.env}');\n if (typeof global.Opal.Isomorfeus.$negotiated_locale === 'function') {\n global.Opal.Isomorfeus[\"$negotiated_locale=\"]('\#{props[:locale]}');\n }\n global.Opal.Isomorfeus['$force_init!']();\n global.Opal.Isomorfeus['$ssr_response_status='](200);\n global.Opal.Isomorfeus.TopLevel['$ssr_route_path=']('\#{props[:location]}');\n JAVASCRIPT\n # if location_host and scheme are given and if Transport is loaded, connect and then render,\n # otherwise do not render because only one pass is required\n ws_scheme = props[:location_scheme] == 'https:' ? 'wss:' : 'ws:'\n location_host = props[:location_host] ? props[:location_host] : 'localhost'\n api_ws_path = Isomorfeus.respond_to?(:api_websocket_path) ? Isomorfeus.api_websocket_path : ''\n transport_ws_url = ws_scheme + location_host + api_ws_path\n javascript << <<~JAVASCRIPT\n let api_ws_path = '\#{api_ws_path}';\n let exception;\n if (typeof global.Opal.Isomorfeus.Transport !== 'undefined' && api_ws_path !== '') {\n global.Opal.Isomorfeus.TopLevel[\"$transport_ws_url=\"](\"\#{transport_ws_url}\");\n global.Opal.send(global.Opal.Isomorfeus.Transport.$promise_connect(), 'then', [], ($$1 = function(){\n try {\n global.Opal.Isomorfeus.TopLevel.$render_component_to_string('\#{component_name}', \#{Oj.dump(props, mode: :strict)});\n global.FirstPassFinished = 'transport';\n } catch (e) {\n global.Exception = e;\n global.FirstPassFinished = 'transport';\n }\n }, $$1.$$s = this, $$1.$$arity = 0, $$1))\n } else { return global.FirstPassFinished = true; };\n JAVASCRIPT\n # execute first render pass\n begin\n first_pass_skipped = Isomorfeus.ssr_contexts[thread_id_asset].exec(javascript)\n rescue Exception => e\n Isomorfeus.raise_error(error: e)\n end\n # wait for first pass to finish\n unless first_pass_skipped\n first_pass_finished, exception = Isomorfeus.ssr_contexts[thread_id_asset].exec('return [global.FirstPassFinished, global.Exception ? { message: global.Exception.message, stack: global.Exception.stack } : false ]')\n Isomorfeus.raise_error(message: \"Server Side Rendering: \#{exception['message']}\", stack: exception['stack']) if exception\n unless first_pass_finished\n start_time = Time.now\n while !first_pass_finished\n break if (Time.now - start_time) > 10\n sleep 0.01\n first_pass_finished = Isomorfeus.ssr_contexts[thread_id_asset].exec('return global.FirstPassFinished')\n end\n end\n # wait for transport requests to finish\n if first_pass_finished == 'transport'\n transport_busy = Isomorfeus.ssr_contexts[thread_id_asset].exec('return global.Opal.Isomorfeus.Transport[\"$busy?\"]()')\n if transport_busy\n start_time = Time.now\n while transport_busy\n break if (Time.now - start_time) > 10\n sleep 0.01\n transport_busy = Isomorfeus.ssr_contexts[thread_id_asset].exec('return global.Opal.Isomorfeus.Transport[\"$busy?\"]()')\n end\n end\n end\n end\n # build javascript for second render pass\n # guard against leaks from first pass, maybe because of a exception\n javascript = <<~JAVASCRIPT\n global.Opal.Preact.render_buffer = [];\n global.Opal.Preact.active_components = [];\n global.Opal.Preact.active_redux_components = [];\n global.Exception = false;\n let rendered_tree;\n let ssr_styles;\n let component;\n try {\n rendered_tree = global.Opal.Isomorfeus.TopLevel.$render_component_to_string('\#{component_name}', \#{Oj.dump(props, mode: :strict)});\n } catch (e) {\n global.Exception = e;\n }\n let application_state = global.Opal.Isomorfeus.store.native.getState();\n if (typeof global.Opal.Isomorfeus.Transport !== 'undefined') { global.Opal.Isomorfeus.Transport.$disconnect(); }\n if (typeof global.NanoCSSInstance !== 'undefined') { ssr_styles = global.NanoCSSInstance.raw }\n return [rendered_tree, application_state, ssr_styles, global.Opal.Isomorfeus['$ssr_response_status'](), global.Exception ? { message: global.Exception.message, stack: global.Exception.stack } : false];\n JAVASCRIPT\n # execute second render pass\n rendered_tree, application_state, @ssr_styles, @ssr_response_status, exception = Isomorfeus.ssr_contexts[thread_id_asset].exec(javascript)\n Isomorfeus.raise_error(message: exception['message'], stack: exception['stack']) if exception\n render_result << \" data-iso-hydrated='true'\" if rendered_tree\n if Isomorfeus.respond_to?(:current_user) && Isomorfeus.current_user && !Isomorfeus.current_user.anonymous?\n render_result << \" data-iso-usid=\#{Oj.dump(Isomorfeus.current_user.to_sid, mode: :strict)}\"\n end\n render_result << \" data-iso-nloc='\#{props[:locale]}'>\"\n render_result << (rendered_tree ? rendered_tree : \"SSR didn't work\")\n else\n if Isomorfeus.respond_to?(:current_user) && Isomorfeus.current_user && !Isomorfeus.current_user.anonymous?\n render_result << \" data-iso-usid=\#{Oj.dump(Isomorfeus.current_user.to_sid, mode: :strict)}\"\n end\n render_result << \" data-iso-nloc='\#{props[:locale]}'>\"\n end\n render_result << '</div>'\n if Isomorfeus.server_side_rendering\n render_result = \"<script type='application/javascript'>\\nServerSideRenderingStateJSON = \#{Oj.dump(application_state, mode: :strict)}\\n</script>\\n\" << render_result\n end\n render_result\nend\n"
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