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import $ from 'jquery';
import { merge } from 'lodash';
import createFlash from '~/flash';
import axios from '~/lib/utils/axios_utils';
import { __ } from '~/locale';
import FilesCommentButton from './files_comment_button';
import initImageDiffHelper from './image_diff/helpers/init_image_diff';
import { getLocationHash } from './lib/utils/url_utility';
import SingleFileDiff from './single_file_diff';
const UNFOLD_COUNT = 20;
let isBound = false;
export default class Diff {
constructor() {
const $diffFile = $('.files .diff-file');
$diffFile.each((index, file) => {
if (!$.data(file, 'singleFileDiff')) {
$.data(file, 'singleFileDiff', new SingleFileDiff(file));
}
});
const tab = document.getElementById('diffs');
if (!tab || (tab && tab.dataset && tab.dataset.isLocked !== ''))
FilesCommentButton.init($diffFile);
const firstFile = $('.files').first().get(0);
const canCreateNote = firstFile && firstFile.hasAttribute('data-can-create-note');
$diffFile.each((index, file) => initImageDiffHelper.initImageDiff(file, canCreateNote));
if (!isBound) {
$(document)
.on('click', '.js-unfold', this.handleClickUnfold.bind(this))
.on('click', '.diff-line-num a', this.handleClickLineNum.bind(this))
.on('mousedown', 'td.line_content.parallel', this.handleParallelLineDown.bind(this));
isBound = true;
}
if (getLocationHash()) {
this.highlightSelectedLine();
}
this.openAnchoredDiff();
this.prepareRenderedDiff();
}
handleClickUnfold(e) {
const $target = $(e.target);
const [oldLineNumber, newLineNumber] = this.lineNumbers($target.parent());
const offset = newLineNumber - oldLineNumber;
const bottom = $target.hasClass('js-unfold-bottom');
let since;
let to;
let unfold = true;
if (bottom) {
const lineNumber = newLineNumber + 1;
since = lineNumber;
to = lineNumber + UNFOLD_COUNT;
} else {
const lineNumber = newLineNumber - 1;
since = lineNumber - UNFOLD_COUNT;
to = lineNumber;
// make sure we aren't loading more than we need
const prevNewLine = this.lineNumbers($target.parent().prev())[1];
if (since <= prevNewLine + 1) {
since = prevNewLine + 1;
unfold = false;
}
}
const file = $target.parents('.diff-file');
const link = file.data('blobDiffPath');
const view = file.data('view');
const params = { since, to, bottom, offset, unfold, view };
axios
.get(link, { params })
.then(({ data }) => $target.parent().replaceWith(data))
.catch(() =>
createFlash({
message: __('An error occurred while loading diff'),
}),
);
}
openAnchoredDiff(cb) {
const locationHash = getLocationHash();
const anchoredDiff = locationHash && locationHash.split('_')[0];
if (!anchoredDiff) return;
const diffTitle = $(`#${anchoredDiff}`);
const diffFile = diffTitle.closest('.diff-file');
const nothingHereBlock = $('.nothing-here-block:visible', diffFile);
if (nothingHereBlock.length) {
const clickTarget = $('.js-file-title, .click-to-expand', diffFile);
diffFile.data('singleFileDiff').toggleDiff(clickTarget, () => {
this.highlightSelectedLine();
if (cb) cb();
});
} else if (cb) {
cb();
}
}
handleClickLineNum(e) {
const hash = $(e.currentTarget).attr('href');
e.preventDefault();
if (window.history.pushState) {
window.history.pushState(null, null, hash);
} else {
window.location.hash = hash;
}
this.highlightSelectedLine();
}
// eslint-disable-next-line class-methods-use-this
handleParallelLineDown(e) {
const line = $(e.currentTarget);
const table = line.closest('table');
table.removeClass('left-side-selected right-side-selected');
const lineClass = ['left-side', 'right-side'].filter((name) => line.hasClass(name))[0];
if (lineClass) {
table.addClass(`${lineClass}-selected`);
}
}
// eslint-disable-next-line class-methods-use-this
diffViewType() {
return $('.inline-parallel-buttons a.active').data('viewType');
}
// eslint-disable-next-line class-methods-use-this
lineNumbers(line) {
const children = line.find('.diff-line-num').toArray();
if (children.length !== 2) {
return [0, 0];
}
return children.map((elm) => parseInt($(elm).data('linenumber'), 10) || 0);
}
// eslint-disable-next-line class-methods-use-this
highlightSelectedLine() {
const hash = getLocationHash();
const $diffFiles = $('.diff-file');
$diffFiles.find('.hll').removeClass('hll');
if (hash) {
$diffFiles
.find(`tr#${hash}:not(.match) td, td#${hash}, td[data-line-code="${hash}"]`)
.addClass('hll');
}
}
prepareRenderedDiff() {
const $elements = $('[data-diff-toggle-entity]');
if ($elements.length === 0) return;
const diff = this;
const elements = $elements.toArray().map(this.formatElementToObject).reduce(merge);
Object.values(elements).forEach((e) => {
e.toShowBtn.onclick = () => diff.showOneHideAnother('rendered', e); // eslint-disable-line no-param-reassign
e.toHideBtn.onclick = () => diff.showOneHideAnother('raw', e); // eslint-disable-line no-param-reassign
diff.showOneHideAnother('rendered', e);
});
}
formatElementToObject = (element) => {
const key = element.attributes['data-file-hash'].value;
const name = element.attributes['data-diff-toggle-entity'].value;
return { [key]: { [name]: element } };
};
showOneHideAnother = (mode, elements) => {
let { toShowBtn, toHideBtn, toShow, toHide } = elements;
if (mode === 'raw') {
[toShowBtn, toHideBtn] = [toHideBtn, toShowBtn];
[toShow, toHide] = [toHide, toShow];
}
toShowBtn.classList.add('selected');
toHideBtn.classList.remove('selected');
toHide.classList.add('hidden');
toShow.classList.remove('hidden');
};
}
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