From 91baea3252b2a8f215b7eff018e22378ae85dd8c Mon Sep 17 00:00:00 2001
From: oval <ole@covalente.dk>
Date: Tue, 7 Jul 2026 16:57:38 +0000
Subject: [PATCH] Add reports/render.go

---
 reports/render.go | 101 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 reports/render.go

diff --git a/reports/render.go b/reports/render.go
new file mode 100644
index 0000000..c501a60
--- /dev/null
+++ b/reports/render.go
@@ -0,0 +1,101 @@
+// render.go — Go-based IEC 62443-3-3 SL2 compliance report renderer.
+//
+// Loads a JSON report produced by ansible-test and renders it through
+// an external Go template file (report.gohtml by default).
+//
+// Usage:
+//   go run render.go <report.json> [template.gohtml]
+//
+// The template receives the full JSON document as an untyped map.
+// Registered template functions:
+//   passIcon      — maps passed value to ✅/❌/🔍/❓
+//   severityIcon  — maps severity string to 🔴/🟠/🟡/🟢/⚪
+//   title         — capitalizes first letter of each word
+//   divf          — float64 division (a/b*100) for percentages
+//   add, sub      — integer arithmetic
+//
+// Dependencies:
+//   golang.org/x/text v0.14.0 (for cases.Title)
+
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"text/template"
+
+	"golang.org/x/text/cases"
+	"golang.org/x/text/language"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Fprintf(os.Stderr, "Usage: gomplate-report <report.json> [template.gohtml]\n")
+		os.Exit(1)
+	}
+
+	jsonPath := os.Args[1]
+	tmplPath := "reports/report.gohtml"
+	if len(os.Args) >= 3 {
+		tmplPath = os.Args[2]
+	}
+
+	data, err := os.ReadFile(jsonPath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error reading JSON: %v\n", err)
+		os.Exit(1)
+	}
+
+	var report map[string]any
+	if err := json.Unmarshal(data, &report); err != nil {
+		fmt.Fprintf(os.Stderr, "Error parsing JSON: %v\n", err)
+		os.Exit(1)
+	}
+
+	funcMap := template.FuncMap{
+		"passIcon": func(v any) string {
+			b, ok := v.(bool)
+			if !ok {
+				return "❓ MANUAL"
+			}
+			if b {
+				return "✅ PASS"
+			}
+			return "❌ FAIL"
+		},
+		"severityIcon": func(s string) string {
+			switch s {
+			case "critical":
+				return "🔴"
+			case "high":
+				return "🟠"
+			case "medium":
+				return "🟡"
+			case "low":
+				return "🟢"
+			}
+			return "⚪"
+		},
+		"title": cases.Title(language.English).String,
+		"divf": func(a, b int) float64 {
+			if b == 0 {
+				return 0
+			}
+			return float64(a) / float64(b) * 100.0
+		},
+		"add": func(a, b int) int { return a + b },
+		"sub": func(a, b int) int { return a - b },
+	}
+
+	tmpl, err := template.New("report.gohtml").Funcs(funcMap).ParseFiles(tmplPath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error parsing template: %v\n", err)
+		os.Exit(1)
+	}
+
+	if err := tmpl.ExecuteTemplate(os.Stdout, "report.gohtml", report); err != nil {
+		fmt.Fprintf(os.Stderr, "Error rendering: %v\n", err)
+		os.Exit(1)
+	}
+}