feat: Add option for inputing template

Now a template file is required to run the cli command. That gives the
user an option to provide its own template file.

An default will be provided later.

4 files changed, 114 insertions, 9 deletions

diff --git a/example.txt b/example.txt
new file mode 100644
index 0000000..8c5c0eb
--- /dev/null
+++ b/example.txt
@@ -0,0 +1,8 @@
+# Apks Alpine 3.18
+
+{{ range $e := . }}
+## {{ $e.Name  }}
+
+{{ range $name, $value := ($e.Properties) }}- **{{$name}}**: {{ $value }}
+{{ end }}
+{{ end }}
diff --git a/main.go b/main.go
index fe3c34f..314ecc8 100644
--- a/main.go
+++ b/main.go
@@ -5,19 +5,18 @@ import (
 	"bufio"
 	"compress/gzip"
 	"errors"
-	"fmt"
 	"io"
 	"net/http"
 	"os"
 
-	"git.sr.ht/~gabrielgio/apkdoc/parser"
 	flag "github.com/spf13/pflag"
 )
 
 func main() {
 	url := flag.StringP("url", "u", "", "Url to the APKINDEX.tar.gz")
 	output := flag.StringP("output", "o", "index.md", "Output path")
-	repositoryFormat := flag.StringP("repository-format", "f", "https://git.sr.ht/~gabrielgio/apkbuilds/tree/%s/item/apks/%s", "Template to build repository link")
+	templateType := flag.StringP("template-type", "p", "text", "Template system to be used, options: html, text")
+	templateFile := flag.StringP("template-file", "t", "text", "Template file to be used")
 	flag.Parse()
 
 	tarStream, err := fechIndex(*url)
@@ -47,13 +46,13 @@ func main() {
 
 	s := bufio.NewScanner(tr)
 
-	entries := make([]*parser.Entry, 0)
+	entries := make([]*Entry, 0)
 	lines := make([]string, 0)
 
 	for s.Scan() {
 		l := s.Text()
 		if l == "" {
-			entry := parser.Parse(lines)
+			entry := Parse(lines)
 			entries = append(entries, entry)
 			lines = make([]string, 0)
 		} else {
@@ -66,13 +65,16 @@ func main() {
 		panic("Error openning output file: " + err.Error())
 	}
 
-	for _, e := range entries {
-		fmt.Fprintln(outputFile, e.FomartLink(*repositoryFormat))
+	tmpl, err := GetTemplate(*templateType, *templateFile)
+	if err != nil {
+		panic("Error loading template file: " + err.Error())
 	}
+
+	tmpl.Execute(outputFile, entries)
 }
 
 func getOutputFile(output string) (*os.File, error) {
-	if output == "" {
+	if output != "" {
 		outputFile, err := os.Create(output)
 		if err != nil {
 			return nil, err
diff --git a/parser/parser.go b/parser.go
index 62b0d85..344efca 100644
--- a/parser/parser.go
+++ b/parser.go
@@ -1,4 +1,4 @@
-package parser
+package main
 
 import (
 	"fmt"
@@ -35,6 +35,57 @@ func (e *Entry) FomartLink(format string) string {
 	return fmt.Sprintf(format, c, *e.Origin)
 }
 
+func (e *Entry) Properties() map[string]string {
+	p := make(map[string]string)
+
+	p["checksum"] = e.Checksum
+	p["version"] = e.Version
+	p["name"] = e.Name
+	p["package size"] = strconv.Itoa(e.PackageSize)
+	p["installed size"] = strconv.Itoa(e.InstalledSize)
+	p["description"] = e.Description
+	p["url"] = e.Url
+	p["license"] = e.License
+
+	if e.Architecture != nil {
+		p["architecture"] = *e.Architecture
+	}
+
+	if e.Origin != nil {
+		p["origin"] = *e.Origin
+	}
+
+	if e.Maintainer != nil {
+		p["maintainer"] = *e.Maintainer
+	}
+
+	if e.BuildTime != nil {
+		p["build time"] = e.BuildTime.String()
+	}
+
+	if e.Commit != nil {
+		p["commit"] = *e.Commit
+	}
+
+	if e.ProviderPriority != nil {
+		p["provider priority"] = strconv.Itoa(*e.ProviderPriority)
+	}
+
+	if len(e.Dependencies) > 0 {
+		p["dependencies"] = strings.Join(e.Dependencies, " ")
+	}
+
+	if len(e.Provides) > 0 {
+		p["provides"] = strings.Join(e.Provides, " ")
+	}
+
+	if len(e.InstallIf) > 0 {
+		p["install if"] = strings.Join(e.InstallIf, " ")
+	}
+
+	return p
+}
+
 func ptr[T any](v T) *T {
 	return &v
 }
diff --git a/template.go b/template.go
new file mode 100644
index 0000000..503af64
--- /dev/null
+++ b/template.go
@@ -0,0 +1,44 @@
+package main
+
+import (
+	html "html/template"
+	"io"
+	"os"
+	text "text/template"
+)
+
+type Templater interface {
+	Execute(wr io.Writer, data any) error
+}
+
+var (
+	templateFunc = map[string]any{
+		"DerefI": func(i *int) int { return *i },
+		"DerefS": func(i *string) string { return *i },
+	}
+)
+
+func GetTemplate(templateType, filePath string) (Templater, error) {
+	file, err := os.Open(filePath)
+	if err != nil {
+		return nil, err
+	}
+
+	tmpl, err := io.ReadAll(file)
+	if err != nil {
+		return nil, err
+	}
+
+	switch templateType {
+	case "text":
+		return text.New("text").
+			Funcs(templateFunc).
+			Parse(string(tmpl))
+	case "html":
+		return html.New("html").
+			Funcs(templateFunc).
+			Parse(string(tmpl))
+	default:
+		panic("Invalid template-type")
+	}
+}