56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
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// Package view handles WebUI generation for clustvirt. The methods and utilties in this module control what is viewed,
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// templates that are loaded, and building those templates. Caching is not considered beyond what is done
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// automattically by go (if anything).
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package view
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import (
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"html/template"
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"io"
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"log"
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"os"
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)
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// View is responsible for assembling a group of templates, providing
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// methods to add data and compose pages in a common way.
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type View struct {
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content string
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template *template.Template
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}
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var basetemplate *template.Template
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// New returns a new instance of the View, expecting the content to be the actual
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// content as a template defining "content", in string format.
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func New(content string) *View {
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if basetemplate == nil {
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log.Println("Initializing base template")
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basetemplate = template.Must(template.New("").ParseFiles(index, header, footer))
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}
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log.Println("Cloning base template")
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v := &View{template: template.Must(basetemplate.Clone())}
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v.parse(content)
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return v
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}
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// NewFromFile loads a template from a file
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func NewFromFile(file string) (*View, error) {
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b, err := os.ReadFile(file)
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return New(string(b)), err
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}
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func (v *View) parse(tmpl string) error {
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log.Println("Parsing template contents")
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if _, err := v.template.Parse(tmpl); err != nil {
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return err
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}
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log.Println("Template parsed")
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return nil
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}
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// Render returns the executed template with data
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func (v *View) Render(w io.Writer, data any) error {
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log.Println("Excuting template")
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return v.template.ExecuteTemplate(w, "_index", data)
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}
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