forked from andreaskoch/allmark
-
Notifications
You must be signed in to change notification settings - Fork 0
/
alias.go
92 lines (72 loc) · 2.8 KB
/
alias.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
// Copyright 2015 Andreas Koch. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package handlers
import (
"github.com/andreaskoch/allmark/common/route"
"github.com/andreaskoch/allmark/web/header"
"github.com/andreaskoch/allmark/web/orchestrator"
"github.com/andreaskoch/allmark/web/view/templates"
"github.com/andreaskoch/allmark/web/view/viewmodel"
"fmt"
"net/http"
"strings"
)
// AliasLookup creates a http handler which redirects aliases to their documents.
func AliasLookup(
headerWriter header.HeaderWriter,
viewModelOrchestrator *orchestrator.ViewModelOrchestrator,
fallbackHandler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// strip the "/!" prefix from the path
path := r.URL.Path
alias := strings.TrimPrefix(path, "/!")
// locate the correct viewmodel for the given alias
viewModel, found := viewModelOrchestrator.GetViewModelByAlias(alias)
if !found {
// no model found for the alias -> use fallback handler
fallbackHandler.ServeHTTP(w, r)
return
}
// determine the redirect url
baseURL := getBaseURLFromRequest(r)
redirectURL := baseURL + viewModel.BaseURL
http.Redirect(w, r, redirectURL, http.StatusMovedPermanently)
})
}
// AliasIndex creates a http handler which displays an index of all aliases.
func AliasIndex(
headerWriter header.HeaderWriter,
navigationOrchestrator *orchestrator.NavigationOrchestrator,
aliasIndexOrchestrator *orchestrator.AliasIndexOrchestrator,
templateProvider templates.Provider) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
// set headers
headerWriter.Write(w, header.CONTENTTYPE_HTML)
hostname := getBaseURLFromRequest(r)
aliasIndexTemplate, err := templateProvider.GetAliasIndexTemplate(hostname)
if err != nil {
fmt.Fprintf(w, "Template not found. Error: %s", err)
return
}
// assemble the base view model
title := "Shortlinks"
description := "A list of all short links to different items in this repository."
viewModel := viewmodel.Model{}
viewModel.Type = "aliasindex"
viewModel.Title = title
viewModel.Description = description
viewModel.PageTitle = aliasIndexOrchestrator.GetPageTitle(title)
viewModel.ToplevelNavigation = navigationOrchestrator.GetToplevelNavigation()
viewModel.BreadcrumbNavigation = navigationOrchestrator.GetBreadcrumbNavigation(route.New())
// assemble the specialized alias index viewmodel
aliasIndexViewModel := viewmodel.AliasIndex{}
aliasIndexViewModel.Model = viewModel
aliasIndexViewModel.Aliases = aliasIndexOrchestrator.GetIndexEntries(hostname, "!")
renderTemplate(aliasIndexTemplate, aliasIndexViewModel, w)
})
}
type aliasIndexViewModel struct {
viewmodel.Model
Entries []viewmodel.Alias
}