Add podcast:txt validation rule.

Author: johnspurlock-skymethod

validator-worker/common/qnames.ts

@@ -63,6 +63,7 @@ export class Qnames {
         source: _podcastIndex('source'),
         trailer: _podcastIndex('trailer'),
         transcript: _podcastIndex('transcript'),
+        txt: _podcastIndex('txt'),
         value: _podcastIndex('value'),
         valueRecipient: _podcastIndex('valueRecipient'),
     }

validator-worker/common/validator.ts

@@ -232,7 +232,6 @@ function validateChannel(channel: ExtendedXmlNode, callbacks: ValidationCallback
     }
     callbacks.onPodcastIndexLiveItemsFound(liveItems.length);
 
-
     // PHASE 5
 
     // podcast:block
@@ -251,6 +250,10 @@ function validateChannel(channel: ExtendedXmlNode, callbacks: ValidationCallback
         .checkValue(isYesNo)
         .checkRemainingAttributes();
 
+    // PHASE 6
+
+    // podcast:txt
+    checkPodcastTxt('channel', channel, callbacks);
 
     // PROPOSALS
 
@@ -371,6 +374,17 @@ function checkPodcastImages(level: Level, node: ExtendedXmlNode, callbacks: Vali
         .checkRemainingAttributes();
 }
 
+function checkPodcastTxt(level: Level, node: ExtendedXmlNode, callbacks: ValidationCallbacks) {
+    const txts = findChildElements(node, ...Qnames.PodcastIndex.txt);
+    const txtReference = podcastIndexReference('https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#txt');
+    for (const txt of txts) {
+        ElementValidation.forElement(level, txt, callbacks, txtReference)
+            .checkOptionalAttribute('purpose', isAtMostCharacters(128))
+            .checkValue(isAtMostCharacters(4000))
+            .checkRemainingAttributes();
+    }
+}
+
 function checkPodcastTagUsage(node: ExtendedXmlNode, callbacks: ValidationCallbacks) {
     const known = new Set<string>();
     const unknown = new Set<string>();
@@ -576,6 +590,11 @@ function validateItem(item: ExtendedXmlNode, callbacks: ValidationCallbacks, ite
         callbacks.onGood(socialInteract, `Found ${itemTagName} <podcast:socialInteract>, nice!`, { tag: 'social-interact', reference: socialInteractReference });
     }
 
+    // PHASE 6
+
+    // podcast:txt
+    checkPodcastTxt('item', item, callbacks);
+
     // PROPOSALS
 
     // (none at the moment)