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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package templates
import (
"fmt"
"html"
"html/template"
"reflect"
"code.gitea.io/gitea/modules/container"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/setting"
)
func dictMerge(base map[string]any, arg any) bool {
if arg == nil {
return true
}
rv := reflect.ValueOf(arg)
if rv.Kind() == reflect.Map {
for _, k := range rv.MapKeys() {
base[k.String()] = rv.MapIndex(k).Interface()
}
return true
}
return false
}
// dict is a helper function for creating a map[string]any from a list of key-value pairs.
// If the key is dot ".", the value is merged into the base map, just like Golang template's dot syntax: dot means current
// The dot syntax is highly discouraged because it might cause unclear key conflicts. It's always good to use explicit keys.
func dict(args ...any) (map[string]any, error) {
if len(args)%2 != 0 {
return nil, fmt.Errorf("invalid dict constructor syntax: must have key-value pairs")
}
m := make(map[string]any, len(args)/2)
for i := 0; i < len(args); i += 2 {
key, ok := args[i].(string)
if !ok {
return nil, fmt.Errorf("invalid dict constructor syntax: unable to merge args[%d]", i)
}
if key == "." {
if ok = dictMerge(m, args[i+1]); !ok {
return nil, fmt.Errorf("invalid dict constructor syntax: dot arg[%d] must be followed by a dict", i)
}
} else {
m[key] = args[i+1]
}
}
return m, nil
}
func dumpVarMarshalable(v any, dumped container.Set[uintptr]) (ret any, ok bool) {
if v == nil {
return nil, true
}
e := reflect.ValueOf(v)
for e.Kind() == reflect.Pointer {
e = e.Elem()
}
if e.CanAddr() {
addr := e.UnsafeAddr()
if !dumped.Add(addr) {
return "[dumped]", false
}
defer dumped.Remove(addr)
}
switch e.Kind() {
case reflect.Bool, reflect.String,
reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
reflect.Float32, reflect.Float64:
return e.Interface(), true
case reflect.Struct:
m := map[string]any{}
for i := 0; i < e.NumField(); i++ {
k := e.Type().Field(i).Name
if !e.Type().Field(i).IsExported() {
continue
}
v := e.Field(i).Interface()
m[k], _ = dumpVarMarshalable(v, dumped)
}
return m, true
case reflect.Map:
m := map[string]any{}
for _, k := range e.MapKeys() {
m[k.String()], _ = dumpVarMarshalable(e.MapIndex(k).Interface(), dumped)
}
return m, true
case reflect.Array, reflect.Slice:
var m []any
for i := 0; i < e.Len(); i++ {
v, _ := dumpVarMarshalable(e.Index(i).Interface(), dumped)
m = append(m, v)
}
return m, true
default:
return "[" + reflect.TypeOf(v).String() + "]", false
}
}
// dumpVar helps to dump a variable in a template, to help debugging and development.
func dumpVar(v any) template.HTML {
if setting.IsProd {
return "<pre>dumpVar: only available in dev mode</pre>"
}
m, ok := dumpVarMarshalable(v, make(container.Set[uintptr]))
var dumpStr string
jsonBytes, err := json.MarshalIndent(m, "", " ")
if err != nil {
dumpStr = fmt.Sprintf("dumpVar: unable to marshal %T: %v", v, err)
} else if ok {
dumpStr = fmt.Sprintf("dumpVar: %T\n%s", v, string(jsonBytes))
} else {
dumpStr = fmt.Sprintf("dumpVar: unmarshalable %T\n%s", v, string(jsonBytes))
}
return template.HTML("<pre>" + html.EscapeString(dumpStr) + "</pre>")
}
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