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code.lisp
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code.lisp
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(in-package :parenscriptx/example)
;;; Helper macro for this-preserving lambda
(ps:defpsmacro tlambda (args &body b)
`(chain
(lambda ,args ,@b)
(bind this)))
(defun start-server ()
(hunchentoot:start (make-instance 'hunchentoot:easy-acceptor :port 4242)))
(defun encode-json-list-to-string (list)
(let ((json::*json-list-encoder-fn* #'json::encode-json-list-explicit-encoder))
(json:encode-json-to-string (cons :list list))))
(hunchentoot:define-easy-handler (comments :uri "/comments.json") ()
(setf (hunchentoot:content-type*) "application/json")
(let ((comments
(if (probe-file "comments.json")
(mapcar #'alexandria:alist-hash-table
(with-open-file (file "comments.json"
:direction :input)
(cl-json:decode-json file)))
(list))))
(when (eql (hunchentoot:request-method*) :post)
(with-open-file (file "comments.json" :direction :output
:if-exists :supersede)
(cl-json:encode-json
(setf comments
(append
comments
(list (alexandria:alist-hash-table (hunchentoot:post-parameters*)))))
file)))
(encode-json-list-to-string comments)))
(push (hunchentoot:create-static-file-dispatcher-and-handler
"/css/base.css"
(asdf:system-relative-pathname :parenscriptx/example "example/base.css")
"text/css") hunchentoot:*dispatch-table*)
(hunchentoot:define-easy-handler (index :uri "/index.html") ()
(with-html-output-to-string (stream nil :prologue "<!DOCTYPE html>")
(:html
(:head
(:title "Hello React")
(:link :rel "stylesheet" :href "css/base.css")
(:script :src "https://cdnjs.cloudflare.com/ajax/libs/react/0.14.3/react.js")
(:script :src "https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js")
(:script :src "https://cdnjs.cloudflare.com/ajax/libs/react/0.14.3/react-dom.min.js")
(:script :src "https://cdnjs.cloudflare.com/ajax/libs/showdown/0.3.1/showdown.min.js"))
(:body
(:div :id "content")
(:script
(ps-to-stream stream
;;; var converter = new Showdown.converter();
(var *converter* (new (chain *showdown (converter))))
;;;var Comment = React.createClass({
;;; render: function() {
;;; var rawMarkup = converter.makeHtml(this.props.children.toString());
;;; return (
;;; <div className="comment">
;;; <h2 className="commentAuthor">
;;; {this.props.author}
;;; </h2>
;;; <span dangerouslySetInnerHTML={{__html: rawMarkup}} />
;;; </div>
;;; );
;;; }
;;; });
(defreact *comment
render (lambda ()
(let ((raw-markup
(chain *converter* (make-html (chain this props children (to-string))))))
(htm
(:div
:class-name "comment"
(:h2
:class-name "comment-author"
(@ this props author))
(:span :dangerously-set-inner-h-t-m-l
(create __html raw-markup)))))))
;;;var CommentBox = React.createClass({
;;; loadCommentsFromServer: function() {
;;; $.ajax({
;;; url: this.props.url,
;;; dataType: 'json',
;;; success: function(data) {
;;; this.setState({data: data});
;;; }.bind(this),
;;; error: function(xhr, status, err) {
;;; console.error(this.props.url, status, err.toString());
;;; }.bind(this)
;;; });
;;; },
;;; handleCommentSubmit: function(comment) {
;;; var comments = this.state.data;
;;; comments.push(comment);
;;; this.setState({data: comments}, function() {
;;; // `setState` accepts a callback. To avoid (improbable) race condition,
;;; // `we'll send the ajax request right after we optimistically set the new
;;; // `state.
;;; $.ajax({
;;; url: this.props.url,
;;; dataType: 'json',
;;; type: 'POST',
;;; data: comment,
;;; success: function(data) {
;;; this.setState({data: data});
;;; }.bind(this),
;;; error: function(xhr, status, err) {
;;; console.error(this.props.url, status, err.toString());
;;; }.bind(this)
;;; });
;;; });
;;; },
;;; getInitialState: function() {
;;; return {data: []};
;;; },
;;; componentDidMount: function() {
;;; this.loadCommentsFromServer();
;;; setInterval(this.loadCommentsFromServer, this.props.pollInterval);
;;; },
;;; render: function() {
;;; return (
;;; <div className="commentBox">
;;; <h1>Comments</h1>
;;; <CommentList data={this.state.data} />
;;; <CommentForm onCommentSubmit={this.handleCommentSubmit} />
;;; </div>
;;; );
;;; }
;;; });
(defreact *comment-box
load-comments-from-server (lambda ()
(chain $
(ajax
(create
url (@ this props url)
data-type "json"
success (tlambda (data)
(chain this (set-state (create data data))))
error (tlambda (xhr status err)
(chain console
(error
(@ this props url)
status
(chain err (to-string)))))))))
handle-comment-submit (lambda (comment)
(let ((comments (@ this state data)))
(chain comments (push comment))
(chain this
(set-state
(create data comments)
(lambda ()
(chain $
(ajax
(create
url (@ this props url)
data-type :json
type "POST"
data comment
success
(tlambda (data)
(chain this
(set-state
(create data data))))
error
(tlambda (xhr status error)
(chain console
(error (@ this props url)
status
(chain err to-string))))))))))))
get-initial-state (lambda () (create data (array)))
component-did-mount (lambda ()
(chain this (load-comments-from-server))
(set-interval (@ this load-comments-from-server)
(@ this props poll-interval)))
render (lambda ()
(htm
(:div :class-name "commentBox"
(:h1 "Comments")
(:*comment-list :data (@ this state data))
(:*comment-form :on-comment-submit
(@ this handle-comment-submit))))))
;;;var CommentList = React.createClass({
;;; render: function() {
;;; var commentNodes = this.props.data.map(function(comment, index) {
;;; return (
;;; // `key` is a React-specific concept and is not mandatory for the
;;; // purpose of this tutorial. if you're curious, see more here:
;;; // http://facebook.github.io/react/docs/multiple-components.html#dynamic-children
;;; <Comment author={comment.author} key={index}>
;;; {comment.text}
;;; </Comment>
;;; );
;;; });
;;; return (
;;; <div className="commentList">
;;; {commentNodes}
;;; </div>
;;; );
;;; }
;;; });
(defreact *comment-list
render (lambda ()
(let ((comment-nodes (chain
this props data
(map (lambda (comment index)
(htm
(:*comment
:author (@ comment author)
:key index
(@ comment text))))))))
(htm
(:div
comment-nodes)))))
;;;var CommentForm = React.createClass({
;;; handleSubmit: function(e) {
;;; e.preventDefault();
;;; var author = React.findDOMNode(this.refs.author).value.trim();
;;; var text = React.findDOMNode(this.refs.text).value.trim();
;;; if (!text || !author) {
;;; return;
;;; }
;;; this.props.onCommentSubmit({author: author, text: text});
;;; React.findDOMNode(this.refs.author).value = '';
;;; React.findDOMNode(this.refs.text).value = '';
;;; },
;;; render: function() {
;;; return (
;;; <form className="commentForm" onSubmit={this.handleSubmit}>
;;; <input type="text" placeholder="Your name" ref="author" />
;;; <input type="text" placeholder="Say something..." ref="text" />
;;; <input type="submit" value="Post" />
;;; </form>
;;; );
;;; }
;;; });
(defreact *comment-form
handle-submit (lambda (e)
(let ((author (chain *react (find-d-o-m-node (@ this refs author))
value (trim)))
(text (chain *react (find-d-o-m-node (@ this refs text))
value (trim))))
(chain e (prevent-default))
(when (and text author)
(chain this props (on-comment-submit
(create author author text text)))
(setf
(chain *react (find-d-o-m-node (@ this refs author)) value)
""
(chain *react (find-d-o-m-node (@ this refs text)) value)
""))))
render (lambda ()
(htm
(:form
:class-name "commentForm"
:on-submit (@ this handle-submit)
(:input :type "text"
:placeholder "Your name"
:ref "author")
(:input :type "text"
:placeholder "Say something..."
:ref "text")
(:input :type "submit" :value "Post")))))
;;;React.render(
;;; <CommentBox url="comments.json" pollInterval={2000} />,
;;; document.getElementById('content')
;;; );
(chain *React-d-o-m (render
(htm
(:*comment-box :url "comments.json"
:poll-interval 2000))
(chain document (get-element-by-id "content"))))))))))