1 files changed, 118 insertions, 0 deletions
diff --git a/util.js b/util.js
new file mode 100644
index 0000000..f2e894b
--- /dev/null
+++ b/util.js
@@ -0,0 +1,118 @@
+#!/usr/bin/node
+/* jshint esnext:true */
+"use strict";
+
+const Discord = require("discord.js"),
+    ua = require("universal-analytics"),
+    Promise = require("bluebird"),
+    Channel = require("async-csp").Channel;
+
+const GOOGLEANALYTICS_ID = process.env.GOOGLEANALYTICS_ID,
+    REACTION_TIMEOUT = parseInt(process.env.REACTION_TIMEOUT) || 60,  // s
+    PREVIEW = process.env.PREVIEW != "false",
+    ROOTURL = (PREVIEW? "https://preview.vainsocial.com/":"https://vainsocial.com/");
+
+const reactionsPipe = new Channel();
+
+// embed template
+module.exports.vainsocialEmbed = (title, link, command) => {
+    return new Discord.RichEmbed()
+        .setTitle(title)
+        .setColor("#55ADD3")
+        .setURL(ROOTURL + link + module.exports.track(command))
+        .setAuthor("VainSocial" + (PREVIEW? " preview":""), ROOTURL + "images/brands/logo-blue.png",
+            ROOTURL + module.exports.track(command))
+        .setFooter("VainSocial" + (PREVIEW? " preview":""), ROOTURL + "images/brands/logo-blue.png")
+};
+
+// analytics url
+module.exports.track = (command) => {
+    return "?utm_source=discordbot&utm_medium=discord&utm_campaign=" + command;
+};
+
+// direct analytics
+module.exports.trackAction = (msg, action, ign="") => {
+    if (GOOGLEANALYTICS_ID == undefined) return;
+    const user = ua(GOOGLEANALYTICS_ID, msg.author.id,
+        { strictCidFormat: false });
+    user.pageview({
+        documentPath: action,
+        documentTitle: ign,
+        campaignSource: msg.guild.id,
+        campaignMedium: msg.guild.name
+    }).send();
+};
+
+// return the shortest version of the usage help
+// just '?vm'
+module.exports.usg = (msg, cmd) => {
+    return msg.anyUsage(cmd, undefined, null);
+};
+
+// reaction -> pipe ->>> consumers
+// handle new reaction event
+module.exports.onNewReaction = (reaction) => {
+    if (reaction.users.array().length <= 1) return;  // was me TODO
+    reactionsPipe.put(reaction);
+};
+
+// create an iterator that returns promises to await new reactions
+// the Promise result is the reaction name
+module.exports.awaitReactions = (message, emoji, timeout=REACTION_TIMEOUT) => {
+    const pipeOut = new Channel();
+    let reactions = [];
+    // stop listening after timeout
+    setTimeout(() => {
+        pipeOut.close();
+        Promise.map(reactions, async (r) => r.remove());
+    }, timeout*1000);
+
+    // async in background
+    Promise.each(emoji, async (em) =>
+        reactions.push(await message.react(em)));
+
+    let reaction;
+    reactionsPipe.pipe(pipeOut);
+    return {
+        next: async function() {
+            do {
+                reaction = await pipeOut.take();
+                if (reaction == Channel.DONE)
+                    return undefined;
+            } while (reaction.message.id != message.id ||
+                emoji.indexOf(reaction.emoji.name) == -1);
+            return reaction.emoji.name;
+        }
+    }
+};
+
+// respond or say text or embed
+module.exports.respond = async (msg, data, response) => {
+    if (response == undefined) {
+        if (typeof data === "string") {
+            response = await msg.say(data);
+        } else {
+            response = await msg.embed(data);
+        }
+    } else {
+        if (typeof data === "string") {
+            if (data != response.content)
+                await response.edit(data);
+        } else {
+            if (new Date(response.embeds[0].createdTimestamp).getTime()
+                != data.timestamp.getTime())
+                // TODO how2 edit embed properly?!
+                await msg.editResponse(response, {
+                    type: "plain",
+                    content: "",
+                    options: { embed: data }
+                });
+        }
+    }
+    return response;
+};
+
+// tell the user that they need to store their name
+module.exports.formatSorryUnknown = (msg) => {
+    return `You're unknown to our service. Try ${util.usg(msg, "help vme")}.`;
+};