SubmitFormOnline.cs

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using System.IO;

public class SubmitFormOnline : MonoBehaviour {
	public InputField textReference;
	public string pendingDir;
	
	// FormID comes from the google drive ID, eg:
	// https://docs.google.com/forms/d/_YOURFORMID_/edit
	private string formID = "_YOURFORMID_";
	
	// fieldID comes from the published feedback form. You can pull the value from the HTML source of the form:
	private const string feedbackFieldID = "entry.YOURENTRYID1";
	private const string senderFieldID = "entry.YOURENTRYID2";
	private const string ipID = "entry.YOURENTRYID3";
	
	private string ip;
	private bool lastError = false;
	
	IEnumerator SendForm(string text) {
		// Prevent spamming of the button when the field is empty:
		if (string.IsNullOrEmpty(text)) yield break;

		WWW w;
		if (string.IsNullOrEmpty(ip)) {
			// This fetches our external IP:
			w = new WWW("https://api.ipify.org/?format=text");
			yield return w;
			ip = w.text;
		}
		
		WWWForm form = new WWWForm();
		form.AddField(senderFieldID, "Field Notes"); // "Your Name" if you were doing the HTML entry.
		form.AddField(feedbackFieldID, text);
		form.AddField(ipID, ip);
		
		string url = "https://docs.google.com/forms/d/"+formID+"/formResponse";
		w = new WWW(url, form.data);
		yield return w;
		if (string.IsNullOrEmpty(w.error)) {
			Debug.Log ("Sent feedback :)");
			lastError = false;
		} else {
			Debug.Log ("Failed to send feedback :( Stowing for later.");
			// Let's stow this feedback in a pending folder so we can retry later:
			GetComponent<SaveFormToDisk>().SaveToFile(text, pendingDir);
			lastError = true;
		}
	}
	
	IEnumerator SendPending() {
		yield return 0;
		string path = FileManager.dataPath+"/"+pendingDir;
		var info = new DirectoryInfo(path);
		if (!info.Exists) {
			// Folder doesn't exist, nothing to send.
			yield break;
		}
		
		var fileInfo = info.GetFiles ();
		foreach (FileInfo file in fileInfo) {
			yield return StartCoroutine(SendForm (File.ReadAllText(file.FullName)));
			if (lastError) {
				// Failed to send, let's back out of this.
				yield break;
			} else {
				// All was good! We can delete the file.
				file.Delete ();
			}
		}
	}
	
	// On startup try sending previous failures.
	void Start() {
		StartCoroutine(SendPending());
	}
	
	// Button activation from UI:
	public void Activate() {
		StartCoroutine(SendForm(textReference.text));
		textReference.text = "";
	}
}