<script type="text/javascript">
	(() => {
		/*
			the following script will save bearblog posts to a browser storage so that 
			the page can be refreshed and the previously drafted post can persist.
			
			Feel free to change the settings below to your liking
		*/

		/* START SETTINGS: */

		/*
			change these to false if you want to turn off saving drafts 
			on a specific page 
		*/
		const SAVE_DRAFT_ON_NEW_POST_PAGE_ENABLED = true;
		const SAVE_DRAFT_ON_EDIT_EXISTING_POST_PAGE_ENABLED = true;

		/* 
			change to false if you want to automatically restore drafts 
			without asking first 
		*/
		const ASK_BEFORE_RESTORING_DRAFT = true;

		/*
			change how many hours you want the drafts to persist for
		*/
		const HOW_MANY_HOURS_TO_KEEP_DRAFTS = 2;

		/* END SETTINGS */

		const storageKeyNew = 'beardraft_newpost';
		const storageKeyEdit = (uuid) => `beardraft_editpost_${uuid}`;

		/* whether or not you're on the create new post page */
		const isNewPage = !!location.pathname.match(/posts\/new\/*$/);
		/* 
			the bearblog URL split into a list of word groups 
			(e.g. "posts/fmwyyiAgqWjjBhKzKzaH", "posts/", "fmwyyiAgqWjjBhKzKzaH")
		*/
		const editPageGroups = location.pathname.match(/(posts\/)(\w*)/);

		/* whether or not you're on the editing existing post page */
		const isEditPage = !!editPageGroups;

		/* the unique ID of your bear post, seen in the URL */
		const postUUID = !!editPageGroups ? editPageGroups[2] : '';

		/* current date in milliseconds */
		const now = Date.now();

		const setDraft = (key, value, _now, expiresInHours) => {
			const expiresinMS = expiresInHours * 60 * 60 * 1000;
			localStorage.setItem(key, `{ "expires": ${_now + expiresinMS}, "post": "${value}" }`);
		};

		const getDraft = (key) => {
			try {
				const _value = localStorage.getItem(key);
				const valueAsJSON = JSON.parse(_value);
				return valueAsJSON?.post;
			} catch (e) {
				return undefined;
			}
		};

		const expireOldDrafts = (_now) => {
			const allLocalStorageValues = { ...localStorage };
			(Object.keys(allLocalStorageValues) || []).forEach((eachKey) => {
				const isBearDraft = !!eachKey.match(/beardraft/gi);

				if (isBearDraft) {
					try {
						const draftValue = allLocalStorageValues[eachKey];
						const valueAsObject = JSON.parse(draftValue);
						if (typeof valueAsObject?.expires === 'number' && valueAsObject.expires < _now) {
							localStorage.removeItem(eachKey);
						}
					} catch (e) {}
				}
			}, []);
		};

		/* get rid of expired drafts from local storage */
		expireOldDrafts(now);

		/*
			paste the draft to the field if new page
		*/
		const bodyContent = document.getElementById('body_content');
		if (SAVE_DRAFT_ON_NEW_POST_PAGE_ENABLED && isNewPage && !!bodyContent) {
			const draftValue = getDraft(storageKeyNew);
			if (!!draftValue) {
				if (
					!ASK_BEFORE_RESTORING_DRAFT ||
					(ASK_BEFORE_RESTORING_DRAFT &&
						window.confirm(
							'You have an unsaved draft saved in your browser storage. Want to restore this post from that draft?'
						))
				) {
					bodyContent.value = decodeURIComponent(draftValue);
				}
			}
		}

		/*
			paste the draft to the field if edit page
		*/
		if (SAVE_DRAFT_ON_EDIT_EXISTING_POST_PAGE_ENABLED && isEditPage && !!bodyContent) {
			const draftValue = getDraft(storageKeyEdit(postUUID));
			if (!!draftValue) {
				if (
					!ASK_BEFORE_RESTORING_DRAFT ||
					(ASK_BEFORE_RESTORING_DRAFT &&
						window.confirm(
							'You have an unsaved draft saved in your browser storage. Want to restore this post from that draft?'
						))
				) {
					bodyContent.value = decodeURIComponent(draftValue);
				}
			}
		}

		window.addEventListener('beforeunload', () => {
			/* the actual content of the post */
			const postBodyElement = document.getElementById('body_content');
			const postBody = !!postBodyElement ? postBodyElement.value : '';

			/* only sets the draft if there is any text in the post */
			if (!!postBody) {
				if (isNewPage) {
					if (SAVE_DRAFT_ON_NEW_POST_PAGE_ENABLED && !!postBody) {
						/* save a new draft if we're on the "create new post" page */
						setDraft(storageKeyNew, encodeURIComponent(postBody), now, HOW_MANY_HOURS_TO_KEEP_DRAFTS);
					}
				} else if (isEditPage) {
					/* save an editing draft if we're on the "editing an existing post" page */
					if (SAVE_DRAFT_ON_EDIT_EXISTING_POST_PAGE_ENABLED && !!postBody) {
						setDraft(storageKeyEdit(postUUID), encodeURIComponent(postBody), now, HOW_MANY_HOURS_TO_KEEP_DRAFTS);
					}
				}
			}
		});
	})();
</script>