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forgejo/modules/templates/util.go

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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package templates
import (
"fmt"
"reflect"
)
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
}