Create spam detection and reporting in posts.js

spam detection and reporting in posts.js

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+class GlobalVars {
+    static reasonWeights = {
+        "blacklisted user": 500,
+        "all-caps title": 100,
+        "repeating characters in body": 50
+    };
+
+    static updateReasonWeights() {
+        this.reasonWeights["spam"] = 200;
+    }
+}
+
+class Post {
+    constructor(postId, postUrl, userUrl, postSite, title, body) {
+        this.postId = postId;
+        this.postUrl = postUrl;
+        this.userUrl = userUrl;
+        this.postSite = postSite;
+        this.title = title;
+        this.body = body;
+        this.isAnswer = false;
+        this.edited = false;
+        this.upVoteCount = 0;
+        this.downVoteCount = 0;
+        this.ownerRep = 0;
+        this.postScore = 0;
+    }
+}
+
+function isWhitelistedUser(userUrl) {
+    return false;
+}
+
+function isBlacklistedUser(userUrl) {
+    return false;
+}
+
+function sumWeight(reasons) {
+    if (Object.keys(GlobalVars.reasonWeights).length === 0) {
+        GlobalVars.updateReasonWeights();
+    }
+
+    let sum = 0;
+    reasons.forEach(reason => {
+        if (reason.includes("(")) {
+            reason = reason.replace(/\s*\(.*$/, "");
+        }
+        sum += GlobalVars.reasonWeights[reason.toLowerCase()] || 0;
+    });
+    return sum;
+}
+
+function checkIfSpam(post, reasons) {
+    let isSpam = false;
+    let why = "";
+
+    if (isBlacklistedUser(post.userUrl)) {
+        reasons.push("blacklisted user");
+        why += "User is blacklisted";
+    }
+
+    if (post.title === post.title.toUpperCase()) {
+        reasons.push("all-caps title");
+    }
+
+    if (reasons.length > 0) {
+        isSpam = true;
+    }
+
+    return isSpam;
+}
+
+function buildMessage(post, reasons) {
+    const messageFormat = "[SmokeDetector] %s: [%s](%s) by %s on `%s`";
+    const postUrl = post.postUrl;
+    const user = post.userUrl || "a deleted user";
+    const title = post.title || "Unknown title";
+    const site = post.postSite;
+    const weight = sumWeight(reasons);
+    const reasonText = reasons.join(", ");
+    return `[SmokeDetector] ${reasonText}: [${title}](${postUrl}) by ${user} on \`${site}\``;
+}
+
+function main() {
+    const examplePost = new Post("123", "http://example.com/post/123", "http://example.com/user/123", "example.com", "THIS IS SPAM", "Spammy content");
+    const reasons = [];
+    const isSpam = checkIfSpam(examplePost, reasons);
+
+    if (isSpam) {
+        const message = buildMessage(examplePost, reasons);
+        console.log("Detected spam: " + message);
+    } else {
+        console.log("Post is not spam.");
+    }
+}
+
+main();