feat: renderer

renderer/codec/list.go

@@ -0,0 +1,56 @@
+package codec
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+
+	"git.max-richter.dev/max/marka/template"
+)
+
+func RenderList(value any, block template.Block) (string, error) {
+	list, ok := value.([]any)
+	if !ok {
+		return "", fmt.Errorf("expected list for path '%s', got %T", block.Path, value)
+	}
+
+	var renderedItems []string
+	// Compile the list template for each item
+	listBlocks, err := template.CompileTemplate(block.ListTemplate)
+	if err != nil {
+		return "", fmt.Errorf("failed to compile list template for path '%s': %w", block.Path, err)
+	}
+
+	for i, item := range list {
+		itemMap, isMap := item.(map[string]any)
+		if !isMap {
+			// If it's not a map, treat it as a simple value for the '.' path
+			itemMap = map[string]any{".": item}
+		}
+
+		var itemBuffer bytes.Buffer
+		for _, lb := range listBlocks {
+			if lb.Type == template.MatchingBlock {
+				itemBuffer.WriteString(lb.GetContent())
+			} else if lb.Type == template.DataBlock {
+				// Special handling for @index in list items
+				if lb.Path == "@index" {
+					itemBuffer.WriteString(fmt.Sprintf("%d", i+1))
+					continue
+				}
+				// Special handling for '.' path when item is not a map
+				if lb.Path == "." && !isMap {
+					itemBuffer.WriteString(fmt.Sprintf("%v", item))
+					continue
+				}
+				renderedItemPart, err := RenderBlock(lb, itemMap)
+				if err != nil {
+					return "", fmt.Errorf("failed to render list item part for path '%s': %w", lb.Path, err)
+				}
+				itemBuffer.WriteString(renderedItemPart)
+			}
+		}
+		renderedItems = append(renderedItems, itemBuffer.String())
+	}
+	return strings.Join(renderedItems, "\n"), nil
+}