71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
const CLAIMS_PER_PAGE = 12;
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module.exports = {
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returnPaginatedChannelClaims (channelName, longChannelClaimId, claims, page) {
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const totalPages = module.exports.determineTotalPages(claims);
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const paginationPage = module.exports.getPageFromQuery(page);
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const viewData = {
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channelName : channelName,
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longChannelClaimId: longChannelClaimId,
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claims : module.exports.extractPageFromClaims(claims, paginationPage),
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previousPage : module.exports.determinePreviousPage(paginationPage),
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currentPage : paginationPage,
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nextPage : module.exports.determineNextPage(totalPages, paginationPage),
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totalPages : totalPages,
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totalResults : module.exports.determineTotalClaims(claims),
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};
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return viewData;
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},
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getPageFromQuery (page) {
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if (page) {
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return parseInt(page);
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}
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return 1;
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},
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extractPageFromClaims (claims, pageNumber) {
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if (!claims) {
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return []; // if no claims, return this default
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}
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// logger.debug('claims is array?', Array.isArray(claims));
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// logger.debug(`pageNumber ${pageNumber} is number?`, Number.isInteger(pageNumber));
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const claimStartIndex = (pageNumber - 1) * CLAIMS_PER_PAGE;
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const claimEndIndex = claimStartIndex + CLAIMS_PER_PAGE;
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const pageOfClaims = claims.slice(claimStartIndex, claimEndIndex);
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return pageOfClaims;
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},
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determineTotalPages (claims) {
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if (!claims) {
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return 0;
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} else {
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const totalClaims = claims.length;
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if (totalClaims < CLAIMS_PER_PAGE) {
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return 1;
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}
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const fullPages = Math.floor(totalClaims / CLAIMS_PER_PAGE);
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const remainder = totalClaims % CLAIMS_PER_PAGE;
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if (remainder === 0) {
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return fullPages;
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}
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return fullPages + 1;
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}
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},
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determinePreviousPage (currentPage) {
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if (currentPage === 1) {
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return null;
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}
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return currentPage - 1;
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},
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determineNextPage (totalPages, currentPage) {
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if (currentPage === totalPages) {
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return null;
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}
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return currentPage + 1;
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},
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determineTotalClaims (claims) {
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if (!claims) {
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return 0;
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}
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return claims.length;
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},
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};
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