add spam filtering

Author: morganchen12

functions/src/github.ts

@@ -127,6 +127,20 @@ export class GitHubClient {
     });
   }
 
+  /**
+   * Closes an issue on a github repo and erases its content.
+   */
+  wipeIssue(org: string, name: string, issue_number: number): Promise<any> {
+    return this.api.issues.update({
+      owner: org,
+      repo: name,
+      issue_number,
+      state: "closed",
+      title: "Spam",
+      body: "This issue was filtered as spam."
+    });
+  }
+
   /**
    * Get all comments on a GitHUb issue.
    */

functions/src/index.ts

@@ -379,6 +379,13 @@ async function executeAction(action: types.Action): Promise<any> {
       closeAction.name,
       closeAction.number
     );
+  } else if (action.type == types.ActionType.GITHUB_SPAM) {
+    const wipeAction = action as types.GitHubSpamAction;
+    actionPromise = gh_client.wipeIssue(
+      wipeAction.org,
+      wipeAction.name,
+      wipeAction.number
+    );
   } else if (action.type == types.ActionType.GITHUB_LOCK) {
     const lockAction = action as types.GitHubLockAction;
     actionPromise = gh_client.lockIssue(

functions/src/issues.ts

@@ -241,6 +241,49 @@ export class IssueHandler {
       actions.push(...this.markNeedsTriage(repo, issue));
     }
 
+    // Filter spam from b/378634578. This can be removed in the future.
+    const spamWords = [
+      'pemain',
+      'wallet wallet', // seems to be in most crypto issues
+      'minecraft',
+      'paybis',
+      'blockchain',
+      'official contact number',
+      'phantom wallet',
+      'defi wallet',
+      'dogecoin',
+      'crypto.com',
+      'moonpay',
+      'coinmama',
+      'daftar',
+      ['wallet', 'support'],
+    ];
+    const issueContent = ` ${issue.title} ${issue.body || ''} `.toLowerCase();
+    // Scope spam filtering to affected repos only.
+    const isAffectedRepo = org == "firebase" && (
+      name == "flutterfire" ||
+      name == "quickstart-android" ||
+      name == "quickstart-ios"
+    );
+    const isSpam = isAffectedRepo && spamWords.find((wordOrArray) => {
+      if (Array.isArray(wordOrArray)) {
+        return wordOrArray.every((word) => issueContent.includes(word));
+      } else {
+        const wordWithSpace = ` ${wordOrArray} `;
+        return issueContent.includes(wordWithSpace);
+      }
+    });
+
+    if (isSpam) {
+      // Discard other actions and wipe the issue.
+      const reason = `Issue is believed to be spam: ${issue.title}`
+      return [
+        new types.GitHubSpamAction(
+          org, name, issue.number, reason
+        )
+      ];
+    }
+
     // Check if it matches the template. This feature is implicitly enabled by
     // the template having "matchable" structure so there is no need to check
     // the repo's configuration.

functions/src/types.ts

@@ -12,6 +12,7 @@ export enum ActionType {
   GITHUB_CLOSE = "GITHUB_CLOSE",
   GITHUB_LOCK = "GITHUB_LOCK",
   GITHUB_NO_OP = "GITHUB_NO_OP",
+  GITHUB_SPAM = "GITHUB_SPAM",
   EMAIL_SEND = "EMAIL_SEND"
 }
 
@@ -21,7 +22,8 @@ export const GITHUB_ISSUE_ACTIONS = [
   ActionType.GITHUB_REMOVE_LABEL,
   ActionType.GITHUB_CLOSE,
   ActionType.GITHUB_LOCK,
-  ActionType.GITHUB_NO_OP
+  ActionType.GITHUB_NO_OP,
+  ActionType.GITHUB_SPAM
 ];
 
 export class Action {
@@ -149,6 +151,16 @@ export class GitHubCloseAction extends GitHubIssueAction {
   }
 }
 
+export class GitHubSpamAction extends GitHubIssueAction {
+  constructor(org: string, name: string, number: number, reason?: string) {
+    super(ActionType.GITHUB_SPAM, org, name, number);
+
+    if (reason) {
+      this.reason = reason;
+    }
+  }
+}
+
 export class GitHubLockAction extends GitHubIssueAction {
   constructor(org: string, name: string, number: number, reason?: string) {
     super(ActionType.GITHUB_LOCK, org, name, number);