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47 lines
1.3 KiB
47 lines
1.3 KiB
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package templates
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import (
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"fmt"
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"reflect"
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)
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func dictMerge(base map[string]any, arg any) bool {
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if arg == nil {
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return true
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}
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rv := reflect.ValueOf(arg)
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if rv.Kind() == reflect.Map {
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for _, k := range rv.MapKeys() {
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base[k.String()] = rv.MapIndex(k).Interface()
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}
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return true
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}
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return false
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}
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// dict is a helper function for creating a map[string]any from a list of key-value pairs.
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// If the key is dot ".", the value is merged into the base map, just like Golang template's dot syntax: dot means current
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// The dot syntax is highly discouraged because it might cause unclear key conflicts. It's always good to use explicit keys.
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func dict(args ...any) (map[string]any, error) {
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if len(args)%2 != 0 {
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return nil, fmt.Errorf("invalid dict constructor syntax: must have key-value pairs")
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}
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m := make(map[string]any, len(args)/2)
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for i := 0; i < len(args); i += 2 {
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key, ok := args[i].(string)
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if !ok {
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return nil, fmt.Errorf("invalid dict constructor syntax: unable to merge args[%d]", i)
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}
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if key == "." {
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if ok = dictMerge(m, args[i+1]); !ok {
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return nil, fmt.Errorf("invalid dict constructor syntax: dot arg[%d] must be followed by a dict", i)
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}
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} else {
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m[key] = args[i+1]
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}
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}
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return m, nil
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}
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