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142 lines
3.0 KiB
Go
142 lines
3.0 KiB
Go
/*
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Copyright 2021 The Flux authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Derived work from https://github.com/d6o/GoTree
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Copyright (c) 2017 Diego Siqueira
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*/
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package tree
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import (
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"strings"
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"github.com/fluxcd/cli-utils/pkg/object"
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ssautil "github.com/fluxcd/pkg/ssa/utils"
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)
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const (
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newLine = "\n"
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emptySpace = " "
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middleItem = "├── "
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continueItem = "│ "
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lastItem = "└── "
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)
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type (
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objMetadataTree struct {
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Resource object.ObjMetadata `json:"resource"`
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ResourceTree []ObjMetadataTree `json:"resources,omitempty"`
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}
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ObjMetadataTree interface {
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Add(objMetadata object.ObjMetadata) ObjMetadataTree
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AddTree(tree ObjMetadataTree)
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Items() []ObjMetadataTree
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Text() string
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Print() string
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}
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printer struct {
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}
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Printer interface {
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Print(ObjMetadataTree) string
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}
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)
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func New(objMetadata object.ObjMetadata) ObjMetadataTree {
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return &objMetadataTree{
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Resource: objMetadata,
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ResourceTree: []ObjMetadataTree{},
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}
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}
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func (t *objMetadataTree) Add(objMetadata object.ObjMetadata) ObjMetadataTree {
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n := New(objMetadata)
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t.ResourceTree = append(t.ResourceTree, n)
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return n
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}
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func (t *objMetadataTree) AddTree(tree ObjMetadataTree) {
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t.ResourceTree = append(t.ResourceTree, tree)
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}
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func (t *objMetadataTree) Text() string {
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return ssautil.FmtObjMetadata(t.Resource)
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}
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func (t *objMetadataTree) Items() []ObjMetadataTree {
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return t.ResourceTree
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}
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func (t *objMetadataTree) Print() string {
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return newPrinter().Print(t)
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}
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func newPrinter() Printer {
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return &printer{}
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}
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func (p *printer) Print(t ObjMetadataTree) string {
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return t.Text() + newLine + p.printItems(t.Items(), []bool{})
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}
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func (p *printer) printText(text string, spaces []bool, last bool) string {
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var result string
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for _, space := range spaces {
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if space {
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result += emptySpace
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} else {
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result += continueItem
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}
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}
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indicator := middleItem
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if last {
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indicator = lastItem
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}
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var out string
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lines := strings.Split(text, "\n")
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for i := range lines {
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text := lines[i]
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if i == 0 {
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out += result + indicator + text + newLine
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continue
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}
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if last {
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indicator = emptySpace
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} else {
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indicator = continueItem
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}
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out += result + indicator + text + newLine
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}
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return out
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}
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func (p *printer) printItems(t []ObjMetadataTree, spaces []bool) string {
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var result string
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for i, f := range t {
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last := i == len(t)-1
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result += p.printText(f.Text(), spaces, last)
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if len(f.Items()) > 0 {
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spacesChild := append(spaces, last)
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result += p.printItems(f.Items(), spacesChild)
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}
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}
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return result
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}
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