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Use intercooler for comment reply form

Previously, the comment reply form was being created entirely
client-side by cloning and modifying a <template>. This was nice because
it meant that a network request wasn't necessary to display the form,
but it also had downsides.

For example, if a topic was locked after a user had already loaded the
page (or their notifications page with a comment from that topic), they
would still be able to click Reply and type in a comment, and wouldn't
know that replying wasn't possible until they actually tried to submit
the comment.

By switching to using intercooler for this form, we can do server-side
validation to check permissions before showing the form, and it also
simplifies some other aspects, such as the warning about replying to an
old comment, which previously needed a data-js-old-warning-age attribute
in the HTML, but is now just part of generating the reply form template
server-side.
merge-requests/106/head
Deimos 5 years ago
parent
commit
6227f747c1
  1. 6
      tildes/scss/modules/_comment.scss
  2. 102
      tildes/static/js/behaviors/comment-reply-button.js
  3. 46
      tildes/static/js/behaviors/comment-reply-form.js
  4. 1
      tildes/tildes/routes.py
  5. 35
      tildes/tildes/templates/intercooler/comment_reply.jinja2
  6. 42
      tildes/tildes/templates/macros/comments.jinja2
  7. 3
      tildes/tildes/templates/notifications_unread.jinja2
  8. 3
      tildes/tildes/templates/topic.jinja2
  9. 3
      tildes/tildes/templates/user.jinja2
  10. 11
      tildes/tildes/views/api/web/comment.py

6
tildes/scss/modules/_comment.scss

@ -100,7 +100,6 @@
.comment-tree {
margin: 0;
padding-top: 0.4rem;
list-style-type: none;
}
@ -114,8 +113,11 @@
.comment-tree-item {
margin: 0;
padding: 0;
max-width: none;
&:first-child {
margin-top: 0.4rem;
}
}
.comment-labels {

102
tildes/static/js/behaviors/comment-reply-button.js

@ -1,102 +0,0 @@
// Copyright (c) 2018 Tildes contributors <code@tildes.net>
// SPDX-License-Identifier: AGPL-3.0-or-later
$.onmount("[data-js-comment-reply-button]", function() {
$(this).click(function(event) {
event.preventDefault();
// disable click/hover events on the reply button
$(this).css("pointer-events", "none");
var $comment = $(this)
.parents(".comment")
.first();
// get the replies list, or create one if it doesn't already exist
var $replies = $comment.children(".comment-tree-replies");
if (!$replies.length) {
var repliesList = document.createElement("ol");
repliesList.setAttribute("class", "comment-tree comment-tree-replies");
$comment.append(repliesList);
$replies = $(repliesList);
}
var $parentComment = $(this).parents("article.comment:first");
var parentCommentID = $parentComment.attr("data-comment-id36");
var postURL = "/api/web/comments/" + parentCommentID + "/replies";
var markdownID = "markdown-reply-" + parentCommentID;
var previewID = markdownID + "-preview";
if ($("#" + markdownID).length > 0) {
$("#" + markdownID).focus();
return;
}
// clone and populate the 'comment-reply' template
var template = document.getElementById("comment-reply");
var clone = document.importNode(template.content, true);
clone.querySelector("form").setAttribute("data-ic-post-to", postURL);
var textarea = clone.querySelector("textarea");
textarea.setAttribute("id", markdownID);
var preview = clone.querySelector(".form-markdown-preview");
preview.setAttribute("id", previewID);
clone
.querySelector("[data-js-markdown-preview-tab] .btn")
.setAttribute("data-ic-target", "#" + previewID);
var cancelButton = clone.querySelector("[data-js-cancel-button]");
$(cancelButton).on("click", function() {
// re-enable click/hover events on the reply button
$(this)
.parents(".comment")
.first()
.find(".btn-post-action[name=reply]")
.first()
.css("pointer-events", "auto");
});
// If the user has text selected inside a comment when they click the reply
// button, start the comment form off with that text inside a blockquote
if (window.getSelection) {
var selectedText = "";
// only capture the selected text if it's all from the same comment
var selection = window.getSelection();
var $start = $(selection.anchorNode).closest(".comment-text");
var $end = $(selection.focusNode).closest(".comment-text");
if ($start.is($end)) {
selectedText = selection.toString();
}
if (selectedText.length > 0) {
selectedText = selectedText.replace(/\s+$/g, "");
selectedText = selectedText.replace(/^/gm, "> ");
textarea.value = selectedText + "\n\n";
textarea.scrollTop = textarea.scrollHeight;
}
}
// add a warning about the comment's age, if necessary (determined by backend)
var warningAge = $(this).attr("data-js-old-warning-age");
if (warningAge) {
var warningDiv = document.createElement("div");
warningDiv.classList.add("warning-old-reply");
warningDiv.innerHTML =
'<p class="text-warning text-small">The comment you\'re replying to ' +
"is " +
warningAge +
" old. Replying to old comments is fine as long as you're " +
"contributing to the discussion.</p>";
clone.querySelector("form").prepend(warningDiv);
}
// update Intercooler so it knows about this new form
Intercooler.processNodes(clone);
$replies.prepend(clone);
$.onmount();
});
});

46
tildes/static/js/behaviors/comment-reply-form.js

@ -0,0 +1,46 @@
// Copyright (c) 2020 Tildes contributors <code@tildes.net>
// SPDX-License-Identifier: AGPL-3.0-or-later
$.onmount("[data-js-comment-reply-form]", function() {
var $this = $(this);
// the parent comment's Reply button (that was clicked to create this form)
var $replyButton = $this
.closest(".comment")
.find(".btn-post-action[name=reply]")
.first();
// disable click/hover events on the reply button to prevent opening multiple forms
$replyButton.css("pointer-events", "none");
// have the Cancel button re-enable click/hover events on the reply button
$this.find("[data-js-cancel-button]").click(function() {
$replyButton.css("pointer-events", "auto");
});
var $textarea = $this.find("textarea").first();
// If the user has text selected inside a comment when the reply form is created,
// populate the textbox with that text inside a blockquote
if (window.getSelection) {
var selectedText = "";
// only capture the selected text if it's all from the same comment
var selection = window.getSelection();
var $start = $(selection.anchorNode).closest(".comment-text");
var $end = $(selection.focusNode).closest(".comment-text");
if ($start.is($end)) {
selectedText = selection.toString();
}
if (selectedText.length > 0) {
selectedText = selectedText.replace(/\s+$/g, "");
selectedText = selectedText.replace(/^/gm, "> ");
$textarea.val(selectedText + "\n\n");
$textarea.scrollTop($textarea.prop("scrollHeight"));
}
}
$textarea.focus();
});

1
tildes/tildes/routes.py

@ -154,6 +154,7 @@ def add_intercooler_routes(config: Configurator) -> None:
with config.route_prefix_context("/comments/{comment_id36}"):
add_ic_route("comment_remove", "/remove", factory=comment_by_id36)
add_ic_route("comment_replies", "/replies", factory=comment_by_id36)
add_ic_route("comment_reply", "/reply", factory=comment_by_id36)
add_ic_route("comment_vote", "/vote", factory=comment_by_id36)
add_ic_route("comment_label", "/labels/{name}", factory=comment_by_id36)
add_ic_route("comment_bookmark", "/bookmark", factory=comment_by_id36)

35
tildes/tildes/templates/intercooler/comment_reply.jinja2

@ -0,0 +1,35 @@
{# Copyright (c) 2020 Tildes contributors <code@tildes.net> #}
{# SPDX-License-Identifier: AGPL-3.0-or-later #}
{% from 'macros/forms.jinja2' import markdown_textarea %}
<li class="comment-tree-item">
<form
method="post"
autocomplete="off"
data-ic-post-to="{{ request.route_url(
"ic_comment_replies",
comment_id36=parent_comment.comment_id36,
) }}"
data-ic-replace-target="true"
data-js-confirm-cancel="Discard your reply?"
data-js-prevent-double-submit
data-js-confirm-leave-page-unsaved
data-js-comment-reply-form
>
{% if parent_comment.age.days >= 7 %}
<div class="warning-old-reply">
<p class="text-warning text-small">The comment you're replying to is {{ parent_comment.age|vague_timedelta_description }} old. Replying to old comments is fine as long as you're contributing to the discussion.</p>
</div>
{% endif %}
{{ markdown_textarea(id="markdown-reply-%s" % parent_comment.comment_id36) }}
<div class="form-buttons">
<button type="submit" class="btn btn-primary">Post comment</button>
<button type="button" class="btn btn-link" data-js-cancel-button>Cancel</button>
</div>
</form>
</li>

42
tildes/tildes/templates/macros/comments.jinja2

@ -3,7 +3,6 @@
{% from 'buttons.jinja2' import post_action_toggle_button with context %}
{% from 'datetime.jinja2' import adaptive_date_responsive %}
{% from 'forms.jinja2' import markdown_textarea %}
{% from 'links.jinja2' import link_to_user with context %}
{% from 'utils.jinja2' import pluralize %}
@ -30,12 +29,13 @@
>
{{ render_comment_contents(comment, is_individual_comment) }}
{# Recursively display reply comments, unless we hit a "removed marker" #}
{% if comment.replies and
(request.has_permission("view", comment) or not comment.removed_marker) %}
<ol class="comment-tree comment-tree-replies">
{% if request.has_permission("view", comment) or not comment.removed_marker %}
<ol class="comment-tree comment-tree-replies">
{# Recursively display reply comments, unless we hit a "removed marker" #}
{% if comment.replies %}
{{ loop(comment.replies) }}
</ol>
{% endif %}
</ol>
{% endif %}
</article>
{% if not is_individual_comment %}</li>{% endif %}
@ -226,10 +226,13 @@
<button
class="btn-post-action"
name="reply"
data-js-comment-reply-button
{% if comment.age.days >= 7 %}
data-js-old-warning-age="{{ comment.age|vague_timedelta_description }}"
{% endif %}
data-ic-get-from="{{ request.route_url(
"ic_comment_reply",
comment_id36=comment.comment_id36,
) }}"
data-ic-target="#comment-{{ comment.comment_id36 }} > .comment-tree-replies:first"
data-ic-scroll-to-target="true"
data-ic-swap-style="prepend"
>Reply</button>
</li>
{% endif %}
@ -282,22 +285,3 @@
</menu>
</template>
{% endmacro %}
{% macro comment_reply_template() %}
<template id="comment-reply">
<form
method="post"
autocomplete="off"
data-js-confirm-cancel="Discard your reply?"
data-js-prevent-double-submit
data-js-confirm-leave-page-unsaved
data-ic-replace-target="true"
>
{{ markdown_textarea(auto_focus=True) }}
<div class="form-buttons">
<button type="submit" class="btn btn-primary">Post comment</button>
<button type="button" class="btn btn-link" data-js-cancel-button>Cancel</button>
</div>
</form>
</template>
{% endmacro %}

3
tildes/tildes/templates/notifications_unread.jinja2

@ -3,7 +3,7 @@
{% extends 'base_user_menu.jinja2' %}
{% from 'macros/comments.jinja2' import comment_label_options_template, comment_reply_template, render_single_comment with context %}
{% from 'macros/comments.jinja2' import comment_label_options_template, render_single_comment with context %}
{% from 'macros/links.jinja2' import link_to_group with context %}
{% block title %}Unread notifications{% endblock %}
@ -80,5 +80,4 @@
{% block templates %}
{{ comment_label_options_template(comment_label_options) }}
{{ comment_reply_template() }}
{% endblock %}

3
tildes/tildes/templates/topic.jinja2

@ -4,7 +4,7 @@
{% extends 'base.jinja2' %}
{% from 'macros/buttons.jinja2' import post_action_toggle_button with context %}
{% from 'macros/comments.jinja2' import comment_label_options_template, comment_reply_template, render_comment_tree with context %}
{% from 'macros/comments.jinja2' import comment_label_options_template, render_comment_tree with context %}
{% from 'macros/datetime.jinja2' import adaptive_date_responsive, time_ago %}
{% from 'macros/forms.jinja2' import markdown_textarea %}
{% from 'macros/groups.jinja2' import group_segmented_link %}
@ -21,7 +21,6 @@
{% block templates %}
{% if request.user %}
{{ comment_reply_template() }}
{{ comment_label_options_template(comment_label_options) }}
{% endif %}
{% endblock %}

3
tildes/tildes/templates/user.jinja2

@ -3,7 +3,7 @@
{% extends 'base_user_menu.jinja2' %}
{% from 'macros/comments.jinja2' import comment_label_options_template, comment_reply_template, render_single_comment with context %}
{% from 'macros/comments.jinja2' import comment_label_options_template, render_single_comment with context %}
{% from 'macros/links.jinja2' import link_to_group with context %}
{% from 'macros/topics.jinja2' import render_topic_for_listing with context %}
@ -11,7 +11,6 @@
{% block templates %}
{% if request.user %}
{{ comment_reply_template() }}
{{ comment_label_options_template(comment_label_options) }}
{% endif %}
{% endblock %}

11
tildes/tildes/views/api/web/comment.py

@ -130,6 +130,17 @@ def get_comment_contents(request: Request) -> dict:
return {"comment": request.context}
@ic_view_config(
route_name="comment_reply",
request_method="GET",
renderer="comment_reply.jinja2",
permission="reply",
)
def get_comment_reply(request: Request) -> dict:
"""Get the reply form for a comment with Intercooler."""
return {"parent_comment": request.context}
@ic_view_config(
route_name="comment",
request_method="GET",

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