1 files changed, 172 insertions, 0 deletions
diff --git a/internal/cms/simpletoml.go b/internal/cms/simpletoml.go
new file mode 100644
index 0000000..af2dcc7
--- /dev/null
+++ b/internal/cms/simpletoml.go
@@ -0,0 +1,172 @@
+package cms
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type simpleTable struct {
+	values map[string]string
+	lists  map[string][]string
+}
+
+func parseSimpleTable(data string) (simpleTable, error) {
+	table := simpleTable{
+		values: map[string]string{},
+		lists:  map[string][]string{},
+	}
+
+	for lineNo, raw := range strings.Split(data, "\n") {
+		line := strings.TrimSpace(raw)
+		if line == "" || strings.HasPrefix(line, "#") || strings.HasPrefix(line, "[[") {
+			continue
+		}
+		key, rawValue, ok := strings.Cut(line, "=")
+		if !ok {
+			return table, fmt.Errorf("line %d: expected key = value", lineNo+1)
+		}
+		key = strings.TrimSpace(key)
+		rawValue = strings.TrimSpace(rawValue)
+		if key == "" {
+			return table, fmt.Errorf("line %d: empty key", lineNo+1)
+		}
+		if strings.HasPrefix(rawValue, "[") {
+			list, err := parseStringList(rawValue)
+			if err != nil {
+				return table, fmt.Errorf("line %d: %w", lineNo+1, err)
+			}
+			table.lists[key] = list
+			continue
+		}
+		value, err := parseScalar(rawValue)
+		if err != nil {
+			return table, fmt.Errorf("line %d: %w", lineNo+1, err)
+		}
+		table.values[key] = value
+	}
+
+	return table, nil
+}
+
+func parseMetadata(data string) (simpleTable, error) {
+	table, err := parseSimpleTable(data)
+	if err == nil {
+		return table, nil
+	}
+	yamlTable, yamlErr := parseSimpleYAMLTable(data)
+	if yamlErr == nil {
+		return yamlTable, nil
+	}
+	return table, err
+}
+
+func parseSimpleYAMLTable(data string) (simpleTable, error) {
+	table := simpleTable{
+		values: map[string]string{},
+		lists:  map[string][]string{},
+	}
+
+	for lineNo, raw := range strings.Split(data, "\n") {
+		line := strings.TrimSpace(raw)
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		key, rawValue, ok := strings.Cut(line, ":")
+		if !ok {
+			return table, fmt.Errorf("line %d: expected key: value", lineNo+1)
+		}
+		key = strings.TrimSpace(key)
+		rawValue = strings.TrimSpace(rawValue)
+		if key == "" {
+			return table, fmt.Errorf("line %d: empty key", lineNo+1)
+		}
+		if strings.HasPrefix(rawValue, "[") {
+			list, err := parseStringList(rawValue)
+			if err != nil {
+				return table, fmt.Errorf("line %d: %w", lineNo+1, err)
+			}
+			table.lists[key] = list
+			continue
+		}
+		if key == "tags" && strings.Contains(rawValue, ",") {
+			table.lists[key] = splitCommaList(rawValue)
+			continue
+		}
+		value, err := parseScalar(rawValue)
+		if err != nil {
+			return table, fmt.Errorf("line %d: %w", lineNo+1, err)
+		}
+		table.values[key] = value
+	}
+
+	return table, nil
+}
+
+func parseScalar(raw string) (string, error) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return "", nil
+	}
+	if strings.HasPrefix(raw, "\"") {
+		value, err := strconv.Unquote(raw)
+		if err != nil {
+			return "", err
+		}
+		return value, nil
+	}
+	return raw, nil
+}
+
+func splitCommaList(value string) []string {
+	var out []string
+	for _, part := range strings.Split(value, ",") {
+		part = strings.TrimSpace(part)
+		if part != "" {
+			out = append(out, part)
+		}
+	}
+	return out
+}
+
+func parseStringList(raw string) ([]string, error) {
+	raw = strings.TrimSpace(raw)
+	if !strings.HasPrefix(raw, "[") || !strings.HasSuffix(raw, "]") {
+		return nil, fmt.Errorf("expected string list")
+	}
+	raw = strings.TrimSpace(strings.TrimSuffix(strings.TrimPrefix(raw, "["), "]"))
+	if raw == "" {
+		return nil, nil
+	}
+
+	var values []string
+	for _, part := range strings.Split(raw, ",") {
+		value, err := parseScalar(strings.TrimSpace(part))
+		if err != nil {
+			return nil, err
+		}
+		if value != "" {
+			values = append(values, value)
+		}
+	}
+	return values, nil
+}
+
+func formatString(value string) string {
+	return strconv.Quote(value)
+}
+
+func formatStringList(values []string) string {
+	quoted := make([]string, 0, len(values))
+	for _, value := range values {
+		quoted = append(quoted, strconv.Quote(value))
+	}
+	return "[" + strings.Join(quoted, ", ") + "]"
+}
+
+func boolString(value bool) string {
+	if value {
+		return "true"
+	}
+	return "false"
+}