Added an a check that validates if an similar PR already exists.

index.js

@@ -1,4 +1,5 @@
 const core = require("@actions/core");
+const _ = require("underscore");
 
 async function getAndPostPullRequests() {
   try {
@@ -18,6 +19,9 @@ async function getAndPostPullRequests() {
     const branch = core.getInput("branch");
     core.info(`The branch ${branch} should be merged.`);
 
+    const base_branch = core.getInput("base_branch");
+    core.info(`The branch ${base_branch} should be merged into.`);
+
     // core.info(`Post Data: ${JSON.stringify(postData)}`);
 
     const githubToken = core.getInput("github_token");
@@ -47,8 +51,14 @@ async function getAndPostPullRequests() {
     core.info(`GET repsonse ${JSON.stringify(pulls, 2)}`);
 
     // Logic to decide if a POST request is needed
-    if (pulls.length === 0) {
-      core.info("No open pulls found, proceeding with POST request...");
+    const targetPRFound = _.any(
+      pulls,
+      (pr) => pr.head.ref === branch && pr.base.ref === base_branch,
+    );
+    if (targetPRFound) {
+      core.info(
+        `No open pulls found, to merge ${branch} into ${base_branch}. Trying to create a new PR.`,
+      );
       return { message: "Abort for thesting" };
       // Perform the POST request
       const postResponse = await fetch(url, {
@@ -65,8 +75,12 @@ async function getAndPostPullRequests() {
       core.info("POST request completed successfully.");
       return postResult;
     } else {
-      core.info("No POST request made as conditions were not met.");
-      return { message: "No POST request made as conditions were not met." };
+      core.info(
+        `There is already an PR for open that merges ${branch} into ${base_branch}.`,
+      );
+      return {
+        message: `There is already an PR for open that merges ${branch} into ${base_branch}.`,
+      };
     }
   } catch (error) {
     core.setFailed(`Action failed with error: ${error}`);