Basic schema parser implemented

app/src/main/java/com/github/mondei1/offpass/CreateActivity.kt

@@ -8,6 +8,7 @@ import kotlinx.android.synthetic.main.activity_create.*
 class CreateActivity : AppCompatActivity() {
     private var fragment_title: TextInput? = null
     private var fragment_username: TextInput? = null
+    private var schema: QRSchema? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -19,6 +20,10 @@ class CreateActivity : AppCompatActivity() {
             .replace(R.id.username, fragment_username!!)
             .commit()
 
+        this.schema = QRSchema()
+        this.schema!!.decrypted_raw = "%JtuB4O9M42%Gitea|Nicolas|542superGoOD_pW&|klier.nicolas@protonmail.com|https://nicolasklier.de:3000|()What's your favorite series%Rick and morty|(2fa)otpauth://totp/OffPass%20Test?secret=d34gfkki5dkd5knifysrpgndd5xb2c7eddwki7ya4pvoisfa5c3ko5pv&issuer=Nicolas%20Klier"
+        this.schema!!.parse()
+
         setSupportActionBar(findViewById(R.id.toolbar))
 
         setContentView(R.layout.activity_create)

app/src/main/java/com/github/mondei1/offpass/QRSchema.kt

@@ -0,0 +1,84 @@
+package com.github.mondei1.offpass
+
+import android.util.Log
+import java.lang.Error
+import java.util.regex.Matcher
+import java.util.regex.Pattern
+
+class QRSchema {
+
+    var raw: String = ""
+    var decrypted_raw: String = ""
+
+    // Parsed content
+    lateinit var session_key: String
+    lateinit var title: String
+    lateinit var username: String
+    lateinit var password: String
+    lateinit var email: String
+    lateinit var website_url: String
+    var custom: HashMap<String, String> = HashMap()             // All defined custom/optional fields
+    var question_awnser: HashMap<String, String> = HashMap()    // Used for security questions
+
+    constructor() {}
+
+    /**
+     * This function will take the already set raw content and tries to parse it.
+     *
+     * @return It will return `true` if the operation was successful and `false` if otherwise.
+     */
+    fun parse(): Boolean {
+        if (decrypted_raw == "") {
+            throw Error("Tried to parse QR-Code schema but raw content must be first decrypted! " +
+                    "Set raw content first and then use decrypt()")
+        }
+
+        // First will be to split the string into it's parts
+        var fields: MutableList<String> = this.decrypted_raw.split("|").toMutableList()
+
+        for (i in 0 until fields.size) {
+            // First four items have to exist and are title, username, password, URL in this order.
+            if (i == 0) {
+                // Check if there is a session key
+                if (fields[0].startsWith("%")) {
+                    fields[0] = fields[0].replace("%", "")
+                    session_key = fields[0].substring(0, 9) // Get first 10 chars, which are the
+                                                            // session key
+                    this.title = fields[0].substring(10, fields[0].length)
+                } else {
+                    this.title = fields[0]
+                }
+
+                this.username = fields[1]
+                this.password = fields[2]
+                this.email = fields[3]
+                this.website_url = fields[4]
+            }
+
+            // Here are optional/custom fields
+            if (i > 4) {
+                if (fields[i].startsWith("(")) {
+                    var closingBracket = fields[i].indexOf(")")
+                    var key = fields[i].substring(1, closingBracket)
+                    var value = fields[i].substring(closingBracket+1, fields[i].length)
+
+                    // We got a security question/awnser
+                    if (key == "") {
+                        var qa = value.split("%")
+                        question_awnser.put(qa[0], qa[1]);
+                    } else {
+                        custom.put(key, value)
+                    }
+                    Log.i("QR-Code schema", custom.toString())
+                } else {
+                    throw Error("Custom/optional field should start with an open bracket: "
+                            + fields[i].toString())
+                }
+            }
+        }
+        Log.i("QR-Code schema", "Found: $session_key, $title, $username, $password, $email, $website_url. ${custom.toString()} and ${question_awnser.toString()}")
+        return true
+
+    }
+
+}