forked from kataras/iris
-
Notifications
You must be signed in to change notification settings - Fork 0
/
pongo.go
183 lines (154 loc) · 4.21 KB
/
pongo.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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
package pongo
import (
"io"
"io/ioutil"
"os"
"path/filepath"
"strings"
"sync"
"fmt"
"github.com/flosch/pongo2"
"github.com/kataras/iris/config"
)
type (
// Engine the pongo2 engine
Engine struct {
Config *config.Template
templateCache map[string]*pongo2.Template
mu sync.Mutex
}
)
// New creates and returns a Pongo template engine
func New(c config.Template) *Engine {
return &Engine{Config: &c, templateCache: make(map[string]*pongo2.Template)}
}
// BuildTemplates builds the templates
func (p *Engine) BuildTemplates() error {
// Add our filters. first
for k, v := range p.Config.Pongo.Filters {
pongo2.RegisterFilter(k, v)
}
if p.Config.Asset == nil || p.Config.AssetNames == nil {
return p.buildFromDir()
}
return p.buildFromAsset()
}
func (p *Engine) buildFromDir() (templateErr error) {
if p.Config.Directory == "" {
return nil //we don't return fill error here(yet)
}
dir := p.Config.Directory
fsLoader, err := pongo2.NewLocalFileSystemLoader(dir) // I see that this doesn't read the content if already parsed, so do it manually via filepath.Walk
if err != nil {
return err
}
set := pongo2.NewSet("", fsLoader)
set.Globals = getPongoContext(p.Config.Pongo.Globals)
// Walk the supplied directory and compile any files that match our extension list.
filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
// Fix same-extension-dirs bug: some dir might be named to: "users.tmpl", "local.html".
// These dirs should be excluded as they are not valid golang templates, but files under
// them should be treat as normal.
// If is a dir, return immediately (dir is not a valid golang template).
if info == nil || info.IsDir() {
return nil
}
rel, err := filepath.Rel(dir, path)
if err != nil {
return err
}
ext := ""
if strings.Index(rel, ".") != -1 {
ext = filepath.Ext(rel)
}
for _, extension := range p.Config.Extensions {
if ext == extension {
buf, err := ioutil.ReadFile(path)
if err != nil {
templateErr = err
break
}
if err != nil {
templateErr = err
break
}
name := filepath.ToSlash(rel)
p.templateCache[name], templateErr = set.FromString(string(buf))
if templateErr != nil {
return templateErr
}
break
}
}
return nil
})
return
}
func (p *Engine) buildFromAsset() error {
var templateErr error
dir := p.Config.Directory
fsLoader, err := pongo2.NewLocalFileSystemLoader(dir)
if err != nil {
return err
}
set := pongo2.NewSet("", fsLoader)
set.Globals = getPongoContext(p.Config.Pongo.Globals)
for _, path := range p.Config.AssetNames() {
if !strings.HasPrefix(path, dir) {
continue
}
rel, err := filepath.Rel(dir, path)
if err != nil {
panic(err)
}
ext := ""
if strings.Index(rel, ".") != -1 {
ext = "." + strings.Join(strings.Split(rel, ".")[1:], ".")
}
for _, extension := range p.Config.Extensions {
if ext == extension {
buf, err := p.Config.Asset(path)
if err != nil {
templateErr = err
break
}
name := filepath.ToSlash(rel)
p.templateCache[name], err = set.FromString(string(buf))
if err != nil {
templateErr = err
break
}
break
}
}
}
return templateErr
}
// getPongoContext returns the pongo2.Context from map[string]interface{} or from pongo2.Context, used internaly
func getPongoContext(templateData interface{}) pongo2.Context {
if templateData == nil {
return nil
}
if contextData, isPongoContext := templateData.(pongo2.Context); isPongoContext {
return contextData
}
return templateData.(map[string]interface{})
}
func (p *Engine) fromCache(relativeName string) *pongo2.Template {
p.mu.Lock() // defer is slow
tmpl, ok := p.templateCache[relativeName]
if ok {
p.mu.Unlock()
return tmpl
}
p.mu.Unlock()
return nil
}
// ExecuteWriter executes a templates and write its results to the out writer
// layout here is useless
func (p *Engine) ExecuteWriter(out io.Writer, name string, binding interface{}, layout string) error {
if tmpl := p.fromCache(name); tmpl != nil {
return tmpl.ExecuteWriter(getPongoContext(binding), out)
}
return fmt.Errorf("[IRIS TEMPLATES] Template with name %s doesn't exists in the dir %s", name, p.Config.Directory)
}