helper class for constructing urlencoded form data

diff --git a/app/src/main/java/net/ktnx/mobileledger/UrlEncodedFormData.java b/app/src/main/java/net/ktnx/mobileledger/UrlEncodedFormData.java
new file mode 100644 (file)
index 0000000..1e09d24
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/UrlEncodedFormData.java
@@ -0,0 +1,46 @@
+package net.ktnx.mobileledger;
+
+import android.support.annotation.NonNull;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.List;
+
+class UrlEncodedFormData {
+    private List<AbstractMap.SimpleEntry<String,String>> pairs;
+
+    UrlEncodedFormData() {
+        pairs = new ArrayList<AbstractMap.SimpleEntry<String, String>>();
+    }
+
+    void add_pair(String name, String value) {
+        pairs.add(new AbstractMap.SimpleEntry<String,String>(name, value));
+    }
+
+    @NonNull
+    public String toString() {
+        StringBuilder result = new StringBuilder();
+        boolean first = true;
+
+        for (AbstractMap.SimpleEntry<String,String> pair : pairs) {
+            if (first) {
+                first = false;
+            }
+            else {
+                result.append('&');
+            }
+
+            try {
+                result.append(URLEncoder.encode(pair.getKey(), "UTF-8"))
+                      .append('=')
+                      .append(URLEncoder.encode(pair.getValue(), "UTF-8"));
+            } catch (UnsupportedEncodingException e) {
+                e.printStackTrace();
+            }
+        }
+
+        return result.toString();
+    }
+}