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// Copyright 2018 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ui
import (
"strings"
)
type breadcrumb struct {
Title string
Href string
Last bool
}
// breadcrumbs builds a data for the breadcrumps navigation element.
//
// It contains a prefix path, where each element is clickable.
func breadcrumbs(path string, ver string) []breadcrumb {
out := []breadcrumb{
{Title: "[root]", Href: prefixPageURL("")},
}
if path != "" {
chunks := strings.Split(path, "/")
for i, ch := range chunks {
out = append(out, breadcrumb{
Title: ch,
Href: prefixPageURL(strings.Join(chunks[:i+1], "/")),
})
}
}
// This is a breadcrumb path to an instance of package named 'path'. Fix URL
// of the crumb that corresponds to the package to point to the package page,
// not the prefix page.
if ver != "" {
out[len(out)-1].Href = packagePageURL(path, "")
out = append(out, breadcrumb{
Title: ver,
Href: instancePageURL(path, ver),
})
}
out[len(out)-1].Last = true
return out
}
type listingItem struct {
Title string
Href string
Back bool
Active bool
}
// listing takes prefix "a/b" and children ["a/b/c", "a/b/d"] and returns
// items titled ["c", "d"].
func pathListing(pfx string, children []string, out []listingItem, cb func(ch string) listingItem) []listingItem {
if pfx != "" {
pfx += "/"
}
for _, ch := range children {
itm := cb(ch)
itm.Title = strings.TrimPrefix(ch, pfx)
out = append(out, itm)
}
return out
}
// prefixesListing formats a list of child prefixes of 'pfx'.
//
// The result includes '..' if 'pfx' is not root.
func prefixesListing(pfx string, prefixes []string) []listingItem {
out := make([]listingItem, 0, len(prefixes)+1)
if pfx != "" {
parent := ""
if idx := strings.LastIndex(pfx, "/"); idx != -1 {
parent = pfx[:idx]
}
out = append(out, listingItem{
Back: true,
Href: prefixPageURL(parent),
})
}
return pathListing(pfx, prefixes, out, func(p string) listingItem {
return listingItem{
Href: prefixPageURL(p),
}
})
}
// packagesListing formats a list of packages under 'pfx'.
//
// One of them can be highlighted as Active.
func packagesListing(pfx string, pkgs []string, active string) []listingItem {
out := make([]listingItem, 0, len(pkgs))
return pathListing(pfx, pkgs, out, func(p string) listingItem {
return listingItem{
Href: packagePageURL(p, ""),
Active: p == active,
}
})
}