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 1// SPDX-FileCopyrightText: 2026 Romain Maneschi <romain@gitroot.dev>
 2//
 3// SPDX-License-Identifier: EUPL-1.2
 4
 5package main
 6
 7import (
 8	"fmt"
 9	"maps"
10	"strings"
11)
12
13type rendererCustom struct {
14	conf Conf
15}
16
17func NewRendererCustom(conf Conf) rendererCustom {
18	return rendererCustom{conf: conf}
19}
20
21func (r rendererCustom) renderPage(pageBuilder *strings.Builder, lines []CacheLineRelativeLink) {
22	layout := r.conf.CustomLayout
23	for _, line := range lines {
24		pathHtml := line.line.fp
25		if p, ok := strings.CutSuffix(pathHtml, ".md"); ok {
26			pathHtml = fmt.Sprintf("%s.html", p)
27		}
28		vars := map[string]string{
29			"title":        line.line.title,
30			"path":         line.line.fp,
31			"relativePath": line.relativePath,
32			"pathHtml":     pathHtml,
33		}
34		for i, s := range line.line.selects {
35			vars[fmt.Sprintf("select[%d]", i)] = s
36		}
37		maps.Copy(vars, r.conf.Metadata)
38		interpolateVars(pageBuilder, layout, vars)
39	}
40}
41
42func interpolateVars(pageBuilder *strings.Builder, content string, vars map[string]string) {
43	for line := range strings.SplitSeq(content, "\n") {
44		for foundFirst, foundLast := strings.Index(line, "{{"), strings.Index(line, "}}"); foundFirst != -1 && foundLast != -1; foundFirst, foundLast = strings.Index(line, "{{"), strings.Index(line, "}}") {
45			key := line[foundFirst+2 : foundLast]
46			pre := line[:foundFirst]
47			pageBuilder.WriteString(pre)
48			if value, ok := vars[key]; ok {
49				pageBuilder.WriteString(value)
50			} else {
51				pageBuilder.WriteString(line[foundFirst : foundLast+2])
52			}
53			line = line[foundLast+2:]
54		}
55		pageBuilder.WriteString(line)
56		pageBuilder.WriteString("\n")
57	}
58}