DisplayAnki note requirements (#1799)

* Update how errors are collected from _formatField

* Expose requirements

2 files changed, 23 insertions, 12 deletions

diff --git a/ext/js/data/anki-note-builder.js b/ext/js/data/anki-note-builder.js
index 4427c276..6077eec1 100644
--- a/ext/js/data/anki-note-builder.js
+++ b/ext/js/data/anki-note-builder.js
@@ -52,20 +52,27 @@ class AnkiNoteBuilder {
             duplicateScopeCheckChildren = true;
         }
 
-        const errors = [];
         const commonData = this._createData(dictionaryEntry, mode, context, resultOutputMode, glossaryLayoutMode, compactTags, injectedMedia);
         const formattedFieldValuePromises = [];
         for (const [, fieldValue] of fields) {
-            const formattedFieldValuePromise = this._formatField(fieldValue, commonData, template, errors);
+            const formattedFieldValuePromise = this._formatField(fieldValue, commonData, template);
             formattedFieldValuePromises.push(formattedFieldValuePromise);
         }
 
         const formattedFieldValues = await Promise.all(formattedFieldValuePromises);
+        const errors = [];
+        const uniqueRequirements = new Map();
         const noteFields = {};
         for (let i = 0, ii = fields.length; i < ii; ++i) {
             const fieldName = fields[i][0];
-            const formattedFieldValue = formattedFieldValues[i];
-            noteFields[fieldName] = formattedFieldValue;
+            const {value, errors: fieldErrors, requirements} = formattedFieldValues[i];
+            noteFields[fieldName] = value;
+            errors.push(...fieldErrors);
+            for (const requirement of requirements) {
+                const key = JSON.stringify(requirement);
+                if (uniqueRequirements.has(key)) { continue; }
+                uniqueRequirements.set(key, requirement);
+            }
         }
 
         const note = {
@@ -82,7 +89,7 @@ class AnkiNoteBuilder {
                 }
             }
         };
-        return {note, errors};
+        return {note, errors, requirements: [...uniqueRequirements.values()]};
     }
 
     async getRenderingData({
@@ -113,10 +120,13 @@ class AnkiNoteBuilder {
         };
     }
 
-    async _formatField(field, commonData, template, errors) {
-        return await this._stringReplaceAsync(field, this._markerPattern, async (g0, marker) => {
+    async _formatField(field, commonData, template) {
+        const errors = [];
+        const requirements = [];
+        const value = await this._stringReplaceAsync(field, this._markerPattern, async (g0, marker) => {
             try {
-                const {result} = await this._renderTemplateBatched(template, commonData, marker);
+                const {result, requirements: fieldRequirements} = await this._renderTemplateBatched(template, commonData, marker);
+                requirements.push(...fieldRequirements);
                 return result;
             } catch (e) {
                 const error = new Error(`Template render error for {${marker}}`);
@@ -125,6 +135,7 @@ class AnkiNoteBuilder {
                 return `{${marker}-render-error}`;
             }
         });
+        return {value, errors, requirements};
     }
 
     async _stringReplaceAsync(str, regex, replacer) {
diff --git a/ext/js/display/display-anki.js b/ext/js/display/display-anki.js
index aedf33c7..a2732c66 100644
--- a/ext/js/display/display-anki.js
+++ b/ext/js/display/display-anki.js
@@ -498,13 +498,13 @@ class DisplayAnki {
 
         const results = [];
         for (let i = 0, ii = noteInfoList.length; i < ii; ++i) {
-            const {note, errors} = noteInfoList[i];
+            const {note, errors, requirements} = noteInfoList[i];
             const {canAdd, valid, noteIds, noteInfos} = infos[i];
             const {mode, index} = noteTargets[i];
             while (index >= results.length) {
                 results.push([]);
             }
-            results[index].push({mode, note, errors, canAdd, valid, noteIds, noteInfos, ankiError});
+            results[index].push({mode, note, errors, requirements, canAdd, valid, noteIds, noteInfos, ankiError});
         }
         return results;
     }
@@ -536,7 +536,7 @@ class DisplayAnki {
             }
         }
 
-        const {note, errors: createNoteErrors} = await this._ankiNoteBuilder.createNote({
+        const {note, errors: createNoteErrors, requirements} = await this._ankiNoteBuilder.createNote({
             dictionaryEntry,
             mode,
             context,
@@ -554,7 +554,7 @@ class DisplayAnki {
             errors
         });
         errors.push(...createNoteErrors);
-        return {note, errors};
+        return {note, errors, requirements};
     }
 
     async _injectAnkiNoteMedia(dictionaryEntry, fields) {