Add checkbox for the comments section

post.hbs

@@ -84,6 +84,7 @@ into the {body} of the default.hbs template --}}
                     </section>
 
                     
+
                 </div>
             </header>
 
@@ -134,6 +135,42 @@ into the {body} of the default.hbs template --}}
                 src="https://www.internet-czas-dzialac.pl/isso/js/embed.min.js" async></script>
 
                     <section id="isso-thread"></section>
+                    <script>
+                      (async function(){
+                      function addCheckbox(){const original_submit = document.querySelector(".post-action input[type='submit']");
+                          original_submit.style.setProperty("display", "none")
+                          const faux_submit = document.createElement("input")
+                          faux_submit.value = "Wyślij"
+                          const comment_checkbox_id = "comment-checkbox"
+                          const checkbox = document.createElement("input")
+                          checkbox.type = "checkbox"
+                          checkbox.id = comment_checkbox_id
+                          checkbox.required = true
+                          const label = document.createElement("label")
+                          label.for = comment_checkbox_id;
+                          label.appendChild(checkbox)
+                          const label_text = document.createElement("span")
+                          label_text.innerHTML = `akceptuję postanowienia <a href="#">regulaminu komentarzy</a>`
+                          label.appendChild(label_text)
+                          document.querySelector("#isso-thread .auth-section").appendChild(label)
+                          faux_submit.addEventListener("click", ()=>{
+                            if(!checkbox.checked){
+                          checkbox.reportValidity()    
+                            }else {
+                            original_submit.click()
+                            }
+                          })
+                          original_submit.parentElement.appendChild(faux_submit)
+                      }
+                          for(let i=0; i<=20; i++){
+							  if(document.querySelector(".post-action input[type='submit']")){
+								  continue
+							  }
+							  await new Promise((resolve)=>setTimeout(resolve, 200));
+						  }
+						  addCheckbox();
+                      })()
+                      </script>
     </div>
 </main>