Publish generated Twitter images for the schedule and gear tweets

#21

src/app/twitter/tweets/GearTweet.js

@@ -31,6 +31,10 @@ class GearTweet extends TwitterPostBase {
         return captureGearScreenshot(now);
     }
 
+    getPublicImageFilename(data) {
+        return 'gear.png';
+    }
+
     getText(data) {
         return `Up now on SplatNet: ${data.gear.name} with ${data.skill.name} #splatnet2`;
     }

src/app/twitter/tweets/ScheduleTweet.js

@@ -39,6 +39,10 @@ class ScheduleTweet extends TwitterPostBase {
         return captureScheduleScreenshot(data.regular.start_time, this.globalSplatfestOpenInAllRegions());
     }
 
+    getPublicImageFilename(data) {
+        return 'schedule.png';
+    }
+
     globalSplatfestOpenInAllRegions() {
         let festivals = readData('festivals.json');
         let time = this.getDataTime();

src/app/twitter/tweets/TwitterPostBase.js

@@ -1,5 +1,6 @@
 const path = require('path');
 const fs = require('fs');
+const mkdirp = require('mkdirp').sync;
 const { postMediaTweet } = require('../client');
 const { getTopOfCurrentHour, readJson, writeJson } = require('@/common/utilities');
 
@@ -28,6 +29,9 @@ class TwitterPostBase {
             let text = await this.getText(data);
             let image = await this.getImage(data);
 
+            // Maybe save the image
+            this.maybeSavePublicImage(data, image);
+
             // Post to Twitter
             let tweet = await postMediaTweet(text, image);
 
@@ -42,6 +46,15 @@ class TwitterPostBase {
         }
     }
 
+    maybeSavePublicImage(data, image) {
+        let filename = this.getPublicImageFilename(data);
+        if (filename) {
+            let outputFilename = path.resolve(`dist/twitter-images/${filename}`);
+            mkdirp(path.dirname(outputFilename));
+            fs.writeFileSync(outputFilename, image);
+        }
+    }
+
     async saveTestScreenshot() {
         try {
             let data = this.getTestData();
@@ -141,6 +154,9 @@ class TwitterPostBase {
     // The image data to be posted with the Tweet
     getImage(data) { }
 
+    // The filename to store the image as (optional)
+    getPublicImageFilename(data) { }
+
     // The text body of the Tweet
     getText(data) { }