Added newsletter

1 files changed, 129 insertions, 0 deletions

diff --git a/newsletter/send b/newsletter/send
new file mode 100755
index 0000000..66bdeb9
--- /dev/null
+++ b/newsletter/send
@@ -0,0 +1,129 @@
+#!/usr/bin/env node
+
+const fs = require('fs');
+const path = require('path');
+const axios = require('axios');
+const dayjs = require('dayjs');
+const weekOfYear = require('dayjs/plugin/weekOfYear');
+const handlebars = require('handlebars');
+const yesno = require('yesno');
+const meow = require('meow');
+const { reverse } = require('dns');
+
+dayjs.extend(weekOfYear);
+
+(async function () {
+
+  const cli = meow(`
+        Usage
+          $ ./send <input>
+
+        Options
+          --production, -p      Uses production mailing list
+
+        Examples
+    $ ./send campaigns/2020-51.json --production
+  `, {
+    flags: {
+      production: {
+        type: 'boolean',
+        alias: 'p'
+      }
+    }
+  });
+
+  if (cli.input.length === 0) {
+    console.log('You must provide campagin JSON file.');
+    process.exit(1);
+  }
+
+  const campaignJSONFile = cli.input[0];
+  const year = path.basename(cli.input[0]).split('.')[0].split('-')[0];
+  const week = path.basename(cli.input[0]).split('.')[0].split('-')[1];
+  const from = { name: 'Mitja Felicijan', email: 'weekly@mitjafelicijan.com' };
+  const mailingList = cli.flags.production
+    ? { env: 'production', id: 'b03de6fc-ff95-40a0-8707-c0706b3c0b31' }
+    : { env: 'testing', id: '2bbcdedb-49d8-48f3-9f33-df6e04c9e5bf' };
+
+  const headers = {
+    'Authorization': 'Bearer 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',
+    'Content-Type': 'application/json',
+  };
+
+  // gets current week
+  let campaign = null;
+  try {
+    campaign = require(`./${campaignJSONFile}`);
+  } catch (err) {
+    console.error(err);
+    process.exit(1);
+  }
+
+  // gets list subscribers
+  const personalizations = [];
+  const contacts = await axios.get('https://api.sendgrid.com/v3/marketing/contacts', { headers: headers }).catch(error => { console.log(error) });
+  if (contacts) {
+    for (const contact of contacts.data.result) {
+      if (contact.list_ids.includes(mailingList.id)) {
+        personalizations.push({ to: [{ email: contact.email }] });
+      }
+    }
+  }
+
+  // gets handlebars template contents
+  let template = null;
+  try {
+    template = handlebars.compile(fs.readFileSync('templates/mailing.hbs', 'utf8'));
+    template = template({ title: `${year}: Week #${week} Links`, campaign });
+  } catch (e) {
+    console.error(err);
+    process.exit(1);
+  }
+
+  fs.writeFileSync(`generated/${year}-${week}.html`, template);
+
+  // asks for user input to allow sending emails
+  console.log(`\nWill send to ${personalizations.length} subscribers from list "${mailingList.env}":`)
+  for (const subscriber of personalizations) {
+    console.log(' - ', subscriber.to[0].email)
+  }
+
+  const consent = await yesno({
+    question: '\nAre you sure you want to continue?'
+  });
+
+  if (consent) {
+    // send actual emails
+    await axios.post('https://api.sendgrid.com/v3/mail/send', {
+      from,
+      subject: `Week #${week} Links`,
+      personalizations,
+      content: [{
+        type: 'text/html',
+        value: template
+      }]
+    }, { headers: headers }).catch(error => { console.log(error) });
+  }
+
+  console.log('\nAnd we are done.\n');
+
+  // generates index file
+
+  const HTMLFiles = fs.readdirSync('./generated/');
+  const indexFile = HTMLFiles.indexOf('index.html');
+  if (indexFile > -1) HTMLFiles.splice(indexFile, 1);
+
+  HTMLFiles.forEach((item, idx) => {
+    const parts = item.split('.')[0].split('-');
+    HTMLFiles[idx] = {
+      year: parts[0],
+      week: parts[1],
+      file: item,
+    }
+  });
+
+  let indexTemplate = handlebars.compile(fs.readFileSync('templates/index.hbs', 'utf8'));
+  indexTemplate = indexTemplate({ files: HTMLFiles.reverse() });
+  fs.writeFileSync(`generated/index.html`, indexTemplate);
+
+}());