Personal blog written from scratch using Node.js, Bootstrap, and MySQL.
https://jrtechs.net
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.3 KiB
70 lines
2.3 KiB
/**
|
|
* Determines if the requested page is out of bounds
|
|
*
|
|
* @param page current page
|
|
* @param postsPerPage - number of blog rendered on each page
|
|
* @param totalPosts - total blog in this category/total
|
|
* @returns {boolean} if this is a valid page
|
|
*/
|
|
const isValidPage = function(page, postsPerPage, totalPosts)
|
|
{
|
|
return !(page === 0 || page -1 >= totalPosts/postsPerPage);
|
|
};
|
|
|
|
module.exports=
|
|
{
|
|
/**
|
|
* Renders two buttons on the bottom of the page to
|
|
* go to the left or right
|
|
*
|
|
* Used by the home page and categories pages
|
|
* @param baseURL -- base url of page being rendered
|
|
* @param currentPage -- current page being rendered
|
|
* @param postsPerPage -- number of blog on each page
|
|
* @param totalPosts -- total amount of blog in the category
|
|
* @returns {Promise} promise which renders the buttons
|
|
*/
|
|
main: function(baseURL, currentPage, postsPerPage, totalPosts, templateContext)
|
|
{
|
|
if(typeof currentPage == "undefined")
|
|
currentPage = 1;
|
|
currentPage = Number(currentPage);
|
|
|
|
if(!isValidPage(currentPage, postsPerPage, totalPosts))
|
|
{
|
|
reject("Invalid Page");
|
|
}
|
|
|
|
var paginationObject = new Object();
|
|
|
|
var nextPage = currentPage + 1;
|
|
var previousPage = currentPage - 1;
|
|
|
|
if (isValidPage(previousPage, postsPerPage, totalPosts))
|
|
{
|
|
paginationObject.previous = {url: baseURL + "?page=" + previousPage};
|
|
}
|
|
|
|
if (isValidPage(nextPage, postsPerPage, totalPosts))
|
|
{
|
|
paginationObject.next = {url: baseURL + "?page=" + nextPage};
|
|
}
|
|
|
|
var page = 1;
|
|
var pages = [];
|
|
while(isValidPage(page, postsPerPage, totalPosts))
|
|
{
|
|
if(page === currentPage)
|
|
{
|
|
pages.push({isCurrent: true, number: page})
|
|
}
|
|
else
|
|
{
|
|
pages.push({number: page, url: baseURL + "?page=" + page})
|
|
}
|
|
page = page + 1;
|
|
}
|
|
paginationObject.pages = pages;
|
|
templateContext.pagination = paginationObject;
|
|
}
|
|
};
|