Module:TemplateHelpers: Difference between revisions

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@@ Line 572: / Line 572: @@
      return TemplateStructure.renderDividerBlock(label)
 end
+-- Merge helper: deduplicate and combine existing values and a new value
+local function mergeValues(existing, newValue)
+    if not newValue or newValue == "" then return existing end
+    if not existing then return newValue end
+    local set = {}
+    local result = {}
+    if type(existing) == "table" then
+        for _, v in ipairs(existing) do
+            set[v] = true
+            table.insert(result, v)
+        end
+    else
+        set[existing] = true
+        table.insert(result, existing)
+    end
+    if not set[newValue] then
+        table.insert(result, newValue)
+    end
+    if #result == 1 then return result[1] end
+    return result
+end
+p.mergeValues = mergeValues
 -- Extracts semantic value from a field, handling wiki links appropriately
@@ Line 587: / Line 610: @@
      if LinkParser.processWikiLink(fieldValue, "check") then
          -- Use the standardized error handling helper
-        return p.withErrorHandling(
+return p.withErrorHandling(
-            errorContext,
+        errorContext,
-            "extractFromWikiLink_" .. fieldName,
+        "extractFromWikiLink_" .. fieldName,
-            LinkParser.extractFromWikiLink,
+        LinkParser.extractFromWikiLink,
-            fieldValue,  -- fallback to original value on error
+        nil,
-            fieldValue
+        fieldValue
-        )
+    )
-    else
+else
-         -- Otherwise, use the plain text value
+         -- Otherwise, only return values from wiki links; drop raw input
-         return fieldValue
+         return nil
      end
 end