Grooscript and Grails 3

grooscript & grails 3
Jorge Franco Leza
Greach - Madrid - April 8th 2016

About me
Developer
Between Madrid & Sevilla
jorge.franco.leza@gmail.com
@jfrancoleza

About grooscript
Apache 2 library
In github, contribute!
Groovy code to javascript
Just a tool, not a framework
Use with Node.js or other java frameworks
Last version 1.2.3

Gradle plugin
http://grooscript.org/gradle/tasks.html
plugins { 
id "org.grooscript.conversion" version "1.2.3" 
}

Convert ﬁles
grooscript { 
source = ['src/main/groovy/gs'] 
destination = 'grails-app/assets/javascripts/generated' 
initialText = '//Grooscript converted file' 
}
bootRun.dependsOn 'convertThread' 
compileGroovy.dependsOn 'convert'
task convertMyScript(type: org.grooscript.gradle.ConvertTask) { 
source = ['src/main/groovy/MyScript.groovy'] 
mainContextScope = ['$'] 
destination = 'src/main/webapp/js' 
includeDependencies = true 
}

Groovy markup templates
templates { 
templatesPath = 'grails-app/views/gtpl' 
templates = ['list-links.gml'] 
destinationFile = 'grails-app/assets/javascripts/' + 
'generated/Templates.js' 
} 
 
bootRun.dependsOn 'templatesThread' 
compileGroovy.dependsOn 'templatesJs'
* can’t use groovy markup templates with g:render

p model.title 
ul(class: "list-links") { 
model.list.each { item -> 
li { 
a(href: item.url) { 
p item.text 
} 
} 
} 
}
import org.grooscript.templates.Templates 
 
Templates.applyTemplate('list-links.gml', 
[title: 'Controllers', list: [ 
[url: 'grails.org', text: 'Grails'], 
[url: 'grooscript.org', text: 'grooscript'] 
]] 
)
list-links.gml

Spy ﬁle changes
spy { 
files = [ 
'grails-app/assets/stylesheets/app.css', 
'grails-app/views/reload/index.gsp' 
] 
 
onChanges = { list -> 
//Or simpler http request 
springWebsocketTo('http://localhost:8080/stomp') 
.data('reload').onChannel('/app/reload') 
} 
} 
 
bootRun.dependsOn 'spyChanges'

Grails 3 plugin
compile "org.grails.plugins:grooscript:1.2.2"

Setup
<!doctype html> 
<html> 
<head> 
<asset:stylesheet src="application.css"/> 
<asset:javascript src="jquery-2.2.0.min.js"/> 
<asset:javascript src="grooscript-grails.js"/> 
 
<g:layoutHead/> 
</head> 
<body> 
 
<g:layoutBody/> 
<asset:deferredScripts/> 
 
</body> 
</html>

Groovy code
<asset:javascript src="generated/Hello"/>
<grooscript:code> 
import gs.Hello 
 
$('body').append '''<footer><p> 
<a href="http://grooscript.org">Grooscript Home</a> && 
<a href="https://twitter.com/grooscript">Twitter</a> 
</p></footer>''' 
new Hello().world() 
</grooscript:code>
def sing = { name -> 
console.log 'Singing...' + name 
} 
 
Closure doSomething = { mapOfClosures -> 
mapOfClosures.each { key, value -> 
value(key) 
} 
} 
 
$(document).ready doSomething([groovy: sing, grails: sing, grooscript: sing]) 
</grooscript:code>

Templates
<grooscript:template> 
ul { 
5.times { number -> 
li number + " li item" 
} 
} 
</grooscript:template>

Websockets
class ReloadController { 
 
def index() { } 
 
@MessageMapping("/reload") 
@SendTo("/topic/reload") 
protected String colors() { 
return 'reload!' 
} 
}
compile "org.grails.plugins:grails-spring-websocket:2.3.0"

<!doctype html> 
<html> 
<head> 
<meta name="layout" content="main"/> 
<title>Reloading</title> 
<asset:javascript src="spring-websocket" /> 
</head> 
<body> 
<grooscript:reloadOn path="/topic/reload"/> 
<p class="reload-message">Change something in this gsp
or in application.css!</p> 
</body> 
</html>

<grooscript:initSpringWebsocket> 
println 'Websocket is up!' 
GrooscriptGrails.sendWebsocketMessage '/app/colors' 
</grooscript:initSpringWebsocket> 
 
<grooscript:onServerEvent path="/topic/colors"> 
allCubes(data) 
</grooscript:onServerEvent> 
 
<grooscript:template functionName="allCubes" onLoad="false" itemSelector="body"> 
table(id: "all-cubes") { 
data.eachWithIndex { row, i -> 
tr { 
row.eachWithIndex { color, j -> 
td(id: 'row-' + i + '-' + j, 
class: 'cube ' + colors[color], 
onmouseover: 'touch(' + i + ', ' + j + ')') 
} 
} 
} 
} 
</grooscript:template>

Remote model
package rest
import grails.rest.Resource 
 
@Resource(uri='/books', formats=['json']) 
class Book { 
 
String title 
String author 
}
* only json

import rest.Book 
 
def drawBooks = { 
Book.list().then { list -> 
$('#bookList').html '' 
list.each { 
appendBookToList(it) 
} 
} 
} 
 
def appendBookToList = { book -> 
$('#bookList').append('<p>Title: '+book.title+' - Author: ‘
+ (book.author?: 'unknown') +'</p>') 
} 
 
def addBook = { 
def title = $('#title').val() 
def author = $('#author').val() 
new Book(title: title, author: author).save().then { 
appendBookToList(it) 
} 
} 
 
$(document).ready { 
drawBooks() 
}
 
</grooscript:code>

Components
http://webcomponents.org
<asset:javascript src="webcomponents.min.js"/>
Custom elements - Shadow dom
<grooscript:component src="components.Counter" name="my-counter"/>
<p>Hello World!</p> 
<my-counter></my-counter> 
<my-counter value="3"></my-counter>

package components 
 
class Counter { 
static style = '''  
div { 
width: 100px; 
} 
''' 
static renderAfter = ['inc', 'dec'] 
int value = 0 
void inc() { 
value++ 
} 
void dec() { 
value-- 
} 
def render() { 
div { 
h1 value.toString() 
p { 
button(onclick: 'dec', '-') 
button(onclick: 'inc', '+') 
} 
} 
} 
}

Links
Homepage: http://grooscript.org
Documentation: http://grooscript.org/doc
Github: http://github.com/chiquitinxx/grooscript
Demos: http://github.com/chiquitinxx/grooscript-demos
Gradle plugin: http://github.com/chiquitinxx/grooscript-gradle-plugin
Grails 3 plugin: http://grooscript.org/grails3-plugin/
All together: https://github.com/chiquitinxx/grails3-demo-grooscript
grooscript@gmail.com
@grooscript

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