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/* eslint-disable consistent-return */
import $ from 'jquery';
import { createAlert } from '~/flash';
import { loadingIconForLegacyJS } from '~/loading_icon_for_legacy_js';
import { spriteIcon } from '~/lib/utils/common_utils';
import FilesCommentButton from './files_comment_button';
import initImageDiffHelper from './image_diff/helpers/init_image_diff';
import axios from './lib/utils/axios_utils';
import { __ } from './locale';
import syntaxHighlight from './syntax_highlight';
const WRAPPER = '<div class="diff-content"></div>';
const LOADING_HTML = loadingIconForLegacyJS().outerHTML;
const ERROR_HTML = `<div class="nothing-here-block">${spriteIcon(
'warning-solid',
's16',
)} Could not load diff</div>`;
const COLLAPSED_HTML =
'<div class="nothing-here-block diff-collapsed">This diff is collapsed. <button class="click-to-expand btn btn-link gl-button">Click to expand it.</button></div>';
export default class SingleFileDiff {
constructor(file) {
this.file = file;
this.toggleDiff = this.toggleDiff.bind(this);
this.content = $('.diff-content', this.file);
this.$chevronRightIcon = $('.diff-toggle-caret .chevron-right', this.file);
this.$chevronDownIcon = $('.diff-toggle-caret .chevron-down', this.file);
this.diffForPath = this.content.find('[data-diff-for-path]').data('diffForPath');
this.isOpen = !this.diffForPath;
if (this.diffForPath) {
this.collapsedContent = this.content;
this.loadingContent = $(WRAPPER).addClass('loading').html(LOADING_HTML).hide();
this.content = null;
this.collapsedContent.after(this.loadingContent);
this.$chevronRightIcon.removeClass('gl-display-none');
} else {
this.collapsedContent = $(WRAPPER).html(COLLAPSED_HTML).hide();
this.content.after(this.collapsedContent);
this.$chevronDownIcon.removeClass('gl-display-none');
}
$('.js-file-title, .click-to-expand', this.file).on('click', (e) => {
this.toggleDiff($(e.target));
});
}
toggleDiff($target, cb) {
if (
!$target.hasClass('js-file-title') &&
!$target.hasClass('click-to-expand') &&
!$target.closest('.diff-toggle-caret').length > 0
)
return;
this.isOpen = !this.isOpen;
if (!this.isOpen && !this.hasError) {
this.content.hide();
this.$chevronRightIcon.removeClass('gl-display-none');
this.$chevronDownIcon.addClass('gl-display-none');
this.collapsedContent.show();
} else if (this.content) {
this.collapsedContent.hide();
this.content.show();
this.$chevronDownIcon.removeClass('gl-display-none');
this.$chevronRightIcon.addClass('gl-display-none');
} else {
this.$chevronDownIcon.removeClass('gl-display-none');
this.$chevronRightIcon.addClass('gl-display-none');
return this.getContentHTML(cb);
}
}
getContentHTML(cb) {
this.collapsedContent.hide();
this.loadingContent.show();
return axios
.get(this.diffForPath)
.then(({ data }) => {
this.loadingContent.hide();
if (data.html) {
this.content = $(data.html);
syntaxHighlight(this.content);
} else {
this.hasError = true;
this.content = $(ERROR_HTML);
}
this.collapsedContent.after(this.content);
const $file = $(this.file);
FilesCommentButton.init($file);
const canCreateNote = $file.closest('.files').is('[data-can-create-note]');
initImageDiffHelper.initImageDiff($file[0], canCreateNote);
if (cb) cb();
})
.catch(() => {
createAlert({
message: __('An error occurred while retrieving diff'),
});
});
}
}
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