Adds two additional helper methods to ATags and Classifieds.

quartz/src/main/java/com/vitorpamplona/quartz/encoders/ATag.kt

@@ -69,6 +69,15 @@ data class ATag(val kind: Int, val pubKeyHex: String, val dTag: String, val rela
             }
         }
 
+        fun parseAtagUnckecked(atag: String): ATag? {
+            return try {
+                val parts = atag.split(":")
+                ATag(parts[0].toInt(), parts[1], parts[2], null)
+            } catch (t: Throwable) {
+                null
+            }
+        }
+
         fun parseNAddr(naddr: String): ATag? {
             try {
                 val key = naddr.removePrefix("nostr:")

quartz/src/main/java/com/vitorpamplona/quartz/events/ClassifiedsEvent.kt

@@ -52,6 +52,26 @@ class ClassifiedsEvent(
 
     fun location() = tags.firstOrNull { it.size > 1 && it[0] == "location" }?.get(1)
 
+    fun isWellFormed(): Boolean {
+        var hasImage = false
+        var hasTitle = false
+        var hasPrice = false
+
+        tags.forEach {
+            if (it.size > 1) {
+                if (it[0] == "image") {
+                    hasImage = true
+                } else if (it[0] == "title") {
+                    hasTitle = true
+                } else if (it[0] == "price") {
+                    hasPrice = true
+                }
+            }
+        }
+
+        return hasImage && hasPrice && hasTitle
+    }
+
     fun publishedAt() =
         try {
             tags.firstOrNull { it.size > 1 && it[0] == "published_at" }?.get(1)?.toLongOrNull()