render method - first version

2024-11-13 22:56:24 +00:00 · 2024-11-13 22:56:24 +00:00 · 0152ebeb91
commit 0152ebeb91
2 changed files with 173 additions and 0 deletions
--- a/template_nest/nest.go
+++ b/template_nest/nest.go
@ -0,0 +1,131 @@
+package template_nest
+
+
+import (
+    "encoding/json"
+    "log"
+    "regexp"
+)
+
+
+type Nest struct {
+
+    templateLabel string
+    templateDir string
+    templates map[string]string
+    tokenDelims [2]string
+
+}
+
+
+func New( templates map[string]string ) Nest {
+
+    nest := Nest{
+        templateLabel: "TEMPLATE",
+        tokenDelims: [2]string{"<!--%", "%-->"},
+        templates: templates,
+    }
+
+    return nest
+}
+
+
+
+
+func (obj *Nest) Render ( sjson []byte ) string {
+
+    var nesti interface{}
+    err := json.Unmarshal(sjson, &nesti)
+    if err != nil {
+      log.Fatal("Failed to parse JSON")
+    }
+
+    nested := nesti.(map[string]interface{})
+
+    html := obj._Render( nested )
+
+    return html
+
+}
+
+
+func (obj *Nest) _Render( nested interface{} ) string{
+
+    var html string
+
+    switch vtype := nested.(type) {
+
+        case string:
+            html = vtype
+
+        case []interface{}:
+
+            html = obj._RenderArray( vtype )
+
+        case map[string]interface{}:
+            html = obj._RenderMap( vtype )
+
+    }
+
+    return html
+
+}
+
+
+func (obj *Nest) _RenderArray( nested []interface{} ) string {
+
+    html := ""
+    for v := range nested {
+        html += obj._Render( v )
+    }
+
+    return html
+}
+
+
+
+
+func (obj *Nest) _RenderMap( nested map[string]interface{} ) string {
+
+    templateName := nested[ obj.templateLabel ].(string)
+    if templateName == "" {
+        panic("Encountered map with no TEMPLATE label")
+    }
+
+    template := obj.templates[ templateName ]
+
+    params := make(map[string]string)
+
+    for k, v := range nested {
+
+        if k == obj.templateLabel {
+            continue
+        }
+
+        params[ k ] = obj._Render( v )
+
+    }
+
+    html := obj._FillIn( templateName, template, params )
+
+    return html
+
+}
+
+
+func (obj *Nest) _FillIn( templateName string, template string, params map[string]string ) string {
+
+    html := template
+    for param, val := range params {
+
+        regex, err := regexp.Compile( obj.tokenDelims[0] + `\s*` + param + `\s*` + obj.tokenDelims[1] )
+        if err != nil {
+            panic( err )
+        }
+
+        html = regex.ReplaceAllString( html, val )
+
+    }
+
+    return html
+}
--- a/test_nest.go
+++ b/test_nest.go
@ -0,0 +1,42 @@
+package main
+
+import (
+    "fmt"
+    "tntester/template_nest"
+)
+
+func main(){
+
+    templates := map[string]string{
+        "00-simple-page": `<!DOCTYPE html>
+    <html lang="en">
+      <head>
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <title>Simple Page</title>
+      </head>
+      <body>
+        <p>A fairly simple page to test the performance of Template::Nest.</p>
+        <p><!--% variable %--></p>
+        <!--% simple_component %-->
+      </body>
+    </html>`, "00-simple-component": `<p><!--% variable %--></p>`}
+
+    json := []byte(`{
+        "TEMPLATE": "00-simple-page",
+         "variable": "Simple Variable",
+         "simple_component":  {
+             "TEMPLATE":"01-simple-component",
+             "variable": "Simple Variable in Simple Component"
+         }
+    }`)
+
+
+    nest := template_nest.New( templates )
+
+    html := nest.Render( json )
+
+    fmt.Println( html )
+
+
+}