Updated to nearly fully functional. Pre-release 1. Still needs some UI changes in the slideshow and admin pages (move the save button & fix the save detection for the internship list). Customer had one more page change request which I need to re-define and handle.

imports/api/Slideshow.js

@@ -0,0 +1,137 @@
+import { Meteor } from 'meteor/meteor';
+import { Mongo } from 'meteor/mongo';
+import { check } from 'meteor/check';
+import SimpleSchema from 'simpl-schema';
+
+let Slideshow = new Mongo.Collection('Slideshow');
+let SlideshowImage = new Mongo.Collection("SlideshowImage");
+
+Slideshow.attachSchema(new SimpleSchema({
+	name: {
+		type: String,
+		label: "Name",
+		optional: false,
+		trim: true,
+		index: 1,
+		unique: true
+	},
+	images: {  //A JSON array of image URL's.
+		type: Array,
+		label: "Images",
+		optional: false,
+		defaultValue: []
+	},
+	'images.$': {
+		type: String
+	},
+	createdAt: {
+		type: Date,
+		label: "Created On",
+		optional: true
+	},
+	updatedAt: {
+		type: Date,
+		label: "Updated On",
+		optional: true
+	}
+}));
+
+SlideshowImage.attachSchema(new SimpleSchema({
+	image: {
+		type: String,
+		label: "Image",
+		optional: false,
+		trim: false
+	}
+}));
+
+if(Meteor.isServer) Meteor.publish('slideshow', function() {
+	return Slideshow.find({});
+});
+
+if(Meteor.isServer) {
+	WebApp.connectHandlers.use("/slideshow-image/", (req, res, next) => {
+		try {
+			let id = req.url.substr(1);
+			
+			let slide = SlideshowImage.findOne(id);
+			
+			if(slide) {
+				let i = slide.image.indexOf(";base64,");
+				let header = slide.image.substr(5, i);
+				let content = slide.image.substr(i + 8);
+				let buffer = new Buffer(content, 'base64');
+				
+				res.writeHead(200, {'Content-Type': header});
+				res.write(buffer);
+				res.end();
+			}
+			else {
+				//TODO: Write out a bad image picture.
+			}
+		} catch(err) {
+			console.log(err);
+			res.end();
+		}
+	});
+	
+	Meteor.methods({
+		addSlideshowImage: function(slideshowId, image) {
+			check(slideshowId, String);
+			check(image, String);
+
+			if(Roles.userIsInRole(this.userId, [Meteor.UserRoles.ROLE_UPDATE])) {
+				let id = SlideshowImage.insert({image});
+				
+				if(id) {
+					Slideshow.update(slideshowId, {$push: {images: id}});
+				}
+				else {
+					throw new Meteor.Error(400, "Image storage failed.");
+				}
+			}
+			else throw new Meteor.Error(403, "Not authorized.");
+		},
+		removeSlideshowImage: function(slideshowId, imageId) {
+			check(slideshowId, String);
+			check(imageId, String);
+			
+			//Note: there is currently no way in mongo to remove an element at an index.
+			Slideshow.update(slideshowId, {$pull: {images: imageId}});
+		},
+		swapSlideshowImages: function(slideshowId, firstIndex, secondIndex) {
+			check(slideshowId, String);
+			check(firstIndex, Number);
+			check(secondIndex, Number);
+			
+			let slideshow = Slideshow.findOne(slideshowId);
+			let temp = slideshow.images[firstIndex];
+			
+			slideshow.images[firstIndex] = slideshow.images[secondIndex];
+			slideshow.images[secondIndex] = temp;
+			
+			Slideshow.update(slideshowId, {$set: {images: slideshow.images}});
+		},
+		addSlideshow: function(name) {
+			check(name, String);
+			if(Roles.userIsInRole(this.userId, [Meteor.UserRoles.ROLE_UPDATE])) {
+				const createdAt = new Date();
+				const updatedAt = createdAt;
+				const images = [];
+				
+				//Returns the id of the object created.
+				return Slideshow.insert({name, images, createdAt, updatedAt});
+			}
+			else throw new Meteor.Error(403, "Not authorized.");
+		},
+		removeSlideshow: function(_id) {
+			check(_id, String);
+			if(Roles.userIsInRole(this.userId, [Meteor.UserRoles.ROLE_UPDATE])) {
+				Slideshow.remove({_id});
+			}
+			else throw new Meteor.Error(403, "Not authorized.");
+		}
+	});
+}
+
+export default Slideshow;