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updateweb.gs
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// Read news stories and associated data from Google sheet and
// write two files for access by newsclip web app:
// * Javascript file with stories, topics and people. Read by HTML file to display stories for end-users
// * JSON file with story metadata. Read by PHP script to set meta tags for social media crawlers
//
// This script should be run after the spreadsheet is updated or edited.
//
// Jon Doig 15/2/2016
//
// Updated 29/4/21: Recreate the archive for previous years if missing.
// This can be used when moving the archive to a new Google Drive account.
// After moving The Leader folder to a new Google Drive,
function updateWeb() {
class Content {
constructor(stories, meta) {
this.stories = stories;
this.meta = meta;
}
};
var sheetFile, jsonFile, jsonMetaFile, jsonPrevMetaFile, jsonPrevStoriesFile;
const mail = true;
const adminEmail = "admin@example.com";
const success = 0,
fail = -1;
var error = "";
const dirName = "TheLeader_public";
const pubDay = 3; // Paper is published each Wednesday
const startYear = 2013;
const thisYear = LastPaperPubDate().getFullYear();
ObjectAssignPolyfill(); // Object.Assign() is not supported by Google App Script
error = openFiles();
if (error) {
_return(fail);
};
// Read previous content from JSON files if available, otherwise from spreadsheet
var prevContent = getPrevContent(startYear, thisYear - 1);
// Try all these functions and if any fail, bail out with all error messages
var topics = getTopicsFromSheets(),
people = getPeopleFromSheets(),
newContent = getContentFromSheets(thisYear,thisYear);
if (error) _return(fail);
var content = joinContent(newContent, prevContent);
writeJsonToFiles(topics, people, content, jsonFile, jsonMetaFile);
_return(success);
function joinContent(c1, c2) {
// Join previous data to new data
var _content = new Content([],{});
_content.stories = c1.stories.concat(c2.stories);
_content.meta = Object.assign(c1.meta, c2.meta);
return _content;
};
function writeJsonToFiles(_topics, _people, _content, _datafile, _metafile) {
if (_topics || _people)
_datafile.setContent(
"{\"topiclist\":" + JSON.stringify(_topics) + "," +
"\"people\":" + JSON.stringify(_people) + "," +
"\"stories\":" + JSON.stringify(_content.stories) + "}"
)
else _datafile.setContent(JSON.stringify(_content.stories));
_metafile.setContent(JSON.stringify(_content.meta));
};
function getPrevContent(_startYear, _lastYear) {
// Read previous content from JSON files if available, otherwise from spreadsheet
// If it's New Year, add last year's content to the prev-files
var _prevContent = new Content([],{}),
_yearContent = new Content([],{});
// Open the latest prev-files available
for (var year = _lastYear; year >= _startYear; year--) {
error = openPrevFiles(_startYear, year);
if (error) error = ""
else {
if (!mail) Logger.log("Reading JSON content for " + _startYear + "-" + year);
_prevContent = readPrevFiles();
break;
}
};
// Create prev-files if none exist
if (!jsonPrevStoriesFile) createPrevFiles(_startYear);
//Get a year's content at a time and add it to the prev-files in case execution reaches runtime limit
for (year = year + 1; year <= _lastYear; year++) {
_yearContent = getContentFromSheets(year);
_prevContent = joinContent(_yearContent, _prevContent);
writeJsonToFiles(null, null, _prevContent, jsonPrevStoriesFile, jsonPrevMetaFile);
if (!mail) Logger.log("Writing JSON archive for " + year);
if (year != _startYear) renamePrevFiles(_startYear, year);
};
return _prevContent;
function createPrevFiles(_fromYear, _toYear = _fromYear) {
var dir = DriveApp.getFoldersByName(dirName).next();
jsonPrevStoriesFile = dir.createFile("econews_stories_" + _fromYear + "-" + _toYear + ".json", '');
jsonPrevMetaFile = dir.createFile("econews_meta_" + _fromYear + "-" + _toYear + ".json", '');
}
function openPrevFiles(_fromYear, _toYear = _fromYear) {
var jsonPrevStoriesFileName = "econews_stories_" + _fromYear + "-" + _toYear + ".json",
jsonPrevMetaFileName = "econews_meta_" + _fromYear + "-" + _toYear + ".json";
var jsonPrevStoriesFileId = getIdFromName(jsonPrevStoriesFileName),
jsonPrevMetaFileId = getIdFromName(jsonPrevMetaFileName);
try {
jsonPrevMetaFile = DriveApp.getFileById(jsonPrevMetaFileId);
} catch (e) {
error += (error) ? "\n" : "";
error += "Cannot open JSON previous metadata file with ID '" + jsonPrevMetaFileId + "'\n" +
"Error: " + e.message + "\n";
}
try {
jsonPrevStoriesFile = DriveApp.getFileById(jsonPrevStoriesFileId);
} catch (e) {
error += (error) ? "\n" : "";
error += "Cannot open JSON previous stories file with ID '" + jsonPrevStoriesFileId + "'\n" +
"Error: " + e.message + "\n";
}
return error;
}
function renamePrevFiles(_fromYear, _toYear = _fromYear) {
jsonPrevStoriesFile.setName("econews_stories_" + _fromYear + "-" + _toYear + ".json")
jsonPrevMetaFile.setName("econews_meta_" + _fromYear + "-" + _toYear + ".json");
}
function readPrevFiles() {
// This actually returns Blob not JSON
_prevContent.stories = jsonPrevStoriesFile.getAs('application/json').getDataAsString();
_prevContent.meta = jsonPrevMetaFile.getAs('application/json').getDataAsString();
if (_prevContent.stories.length == 0 || _prevContent.meta.length == 0) {
error = "Previous content file(s) are empty";
_return(fail);
}
// Apparently no way around this conversion
_prevContent.stories = JSON.parse(_prevContent.stories);
_prevContent.meta = JSON.parse(_prevContent.meta);
return _prevContent;
}
}
function LastPaperPubDate() {
var ms2Day = 1000 * 60 * 60 * 24;
var today = new Date();
var todayDay = today.getDay();
if (todayDay < pubDay) todayDay = + 7;
return new Date(today - (todayDay - pubDay) * ms2Day);
}
function getIdFromName(name) {
var regex = /\/view\?usp=[a-z_]*/;
var files = DriveApp.getFilesByName(name);
var u;
while (files.hasNext()) {
var file = files.next();
u = file.getUrl().replace(regex, "").match(/[-\w]{25,}/)[0];
};
return u;
}
function openFiles() {
var sheetFileId = getIdFromName("Leader ecoNews - EDIT"),
jsonFileId = getIdFromName("econews.json"),
jsonMetaFileId = getIdFromName("econews_meta.json");
try {
sheetFile = SpreadsheetApp.openById(sheetFileId);
} catch (e) {
error = "Cannot open spreadsheet with ID '" + sheetFileId +
"'\n" +
"Error: " + e.message + "\n";
}
try {
jsonFile = DriveApp.getFileById(jsonFileId);
} catch (e) {
error += (error) ? "\n" : "";
error += "Cannot open JSON data file with ID '" + jsonFileId +
"'\n" +
"Error: " + e.message + "\n";
}
try {
jsonMetaFile = DriveApp.getFileById(jsonMetaFileId);
} catch (e) {
error += (error) ? "\n" : "";
error += "Cannot open JSON metadata file with ID '" + jsonMetaFileId +
"'\n" +
"Error: " + e.message + "\n";
}
return error;
}
// Perhaps these three functions could be one,
// by passing all the differences as arguments...
function getTopicsFromSheets() {
var _topics = [];
var startRow = 1; // = row 2
var nameCol = 0,
descCol = 1;
var sheetName = "Topics";
var sheet, values, r;
sheet = sheetFile.getSheetByName(sheetName);
if (!sheet) {
error += (error) ? "\n" : "";
error += "Cannot find sheet '" + sheetName + "'\n";
return fail;
};
values = sheet.getDataRange().getValues();
for (r = startRow; r < sheet.getLastRow(); r++) {
if (values[r][nameCol] == "") break; // Reached last topic in sheet
var topic = {
name: values[r][nameCol],
description: values[r][descCol]
};
_topics.push(topic);
};
_topics.sort(function (a, b) {
return a.name.localeCompare(b.name);
});
return _topics;
}
function getPeopleFromSheets() {
var _people = [];
var startRow = 1; // = row 2
var initCol = 0,
nameCol = 1;
var sheetName = "People";
var sheet, values, r;
sheet = sheetFile.getSheetByName(sheetName);
if (!sheet) {
error += (error) ? "\n" : "";
error += "Cannot find sheet '" + sheetName + "'\n";
return;
}
values = sheet.getDataRange().getValues();
for (r = startRow; r < sheet.getLastRow(); r++) {
if (values[r][initCol] == "") break; // Reached last person in sheet
var person = {
initials: values[r][initCol],
fullname: values[r][nameCol]
};
_people.push(person);
}
_people.sort(function (a, b) {
return a.fullname.localeCompare(b.fullname);
});
return _people;
}
function getContentFromSheets(_fromYear, _toYear = _fromYear) {
var _content = {
stories: [],
meta: {}
};
var startRow = 1; // = row 2
const dateCol = 0,
pageCol = 1,
titleCol = 4,
authorCol = 5,
personCol = 6,
topicsCol = 15,
linkCol = 7,
onlineCol = 9;
// These constant strings will be stripped from URLs to save space and I/O time
const linkPrefix = /https:\/\/d(rive|ocs).google.com\/file\/d\//;
const linkSuffix = /\/(view|edit)\?usp=[a-z_]*/;
var sheet, sheetName, values, r;
for (var y = _fromYear; y <= _toYear; y++) {
sheetName = "Stories " + y;
sheet = sheetFile.getSheetByName(sheetName);
if (!sheet) {
error += (error) ? "\n" : "";
error += "Cannot find sheet '" + sheetName + "'\n";
}
if (!error) {
if (!mail) Logger.log("Reading sheet '" + sheetName + "'");
values = sheet.getDataRange().getValues();
for (r = startRow; r < sheet.getLastRow(); r++) {
if (values[r][dateCol] == "") break; // Reached last actual story in sheet, remaining rows are formulas only
else if ((r % 100) == 0 && (!mail)) Logger.log(" row " + r);
var story = {
date: isoDateString(values[r][dateCol]),
page: values[r][pageCol],
title: values[r][titleCol],
author: values[r][authorCol],
person: values[r][personCol],
topics: values[r][topicsCol],
link: values[r][linkCol],
online: values[r][onlineCol]
};
// Strip constant URL sections to save time writing and reading JSON file
story.link = story.link.replace(linkPrefix, "");
story.link = story.link.replace(linkSuffix, "");
_content.stories.push(story);
if (story.link) { // Only stories with images can be shared, so only they need metadata
var storyMeta = {
title: story.title,
author: story.author,
date: story.date,
page: story.page
};
_content.meta[story.link] = storyMeta;
}
}
}
if (!mail) Logger.log(" last row: " + r);
}
if (error) return;
else {
_content.stories = sortStories(_content.stories);
// _content.stories.sort(function (a, b) {
// if (a.date < b.date) return 1;
// if (a.date > b.date) return -1;
// return (a.page - b.page);
// });
return _content;
}
function isoDateString(s) {
var d = s.getDate();
if (d < 10) d = "0" + d;
var m = s.getMonth() + 1;
if (m < 10) m = "0" + m;
var y = s.getFullYear();
return y + "-" + m + "-" + d;
}
}
function sortStories(_stories) {
return _stories.sort(function (a, b) {
if (a.date < b.date) return 1;
if (a.date > b.date) return -1;
return (a.page - b.page);
});
}
function _return(status) {
var heading;
switch (status) {
case success:
heading = "Newsclip updateWeb succeeded";
msg = "Newsclip updateWeb finished " + new Date() + "\n";
break;
case fail:
heading = "Newsclip updateWeb Error";
msg = "Newsclip updateWeb failed " + new Date() + "\n\n" + error;
break;
default:
break;
}
if (mail) {
MailApp.sendEmail(adminEmail, heading, msg);
} else {
Logger.log(heading);
Logger.log(msg);
}
if (status == fail) throw new Error(error);
}
function ObjectAssignPolyfill() {
if (typeof Object.assign != 'function') {
// Must be writable: true, enumerable: false, configurable: true
Object.defineProperty(Object, "assign", {
value: function assign(target, varArgs) { // .length of function is 2
'use strict';
if (target == null) { // TypeError if undefined or null
throw new TypeError('Cannot convert undefined or null to object');
}
var to = Object(target);
for (var index = 1; index < arguments.length; index++) {
var nextSource = arguments[index];
if (nextSource != null) { // Skip over if undefined or null
for (var nextKey in nextSource) {
// Avoid bugs when hasOwnProperty is shadowed
if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
to[nextKey] = nextSource[nextKey];
}
}
}
}
return to;
},
writable: true,
configurable: true
});
}
}
}