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
|
package alps
import (
"html/template"
"net/http"
"path/filepath"
"github.com/labstack/echo/v4"
)
type goPlugin struct {
p *GoPlugin
}
func (p *goPlugin) Name() string {
return p.p.Name
}
func (p *goPlugin) LoadTemplate(t *template.Template) error {
t.Funcs(p.p.templateFuncs)
paths, err := filepath.Glob(PluginDir + "/" + p.p.Name + "/public/*.html")
if err != nil {
return err
}
if len(paths) > 0 {
if _, err := t.ParseFiles(paths...); err != nil {
return err
}
}
return nil
}
func (p *goPlugin) SetRoutes(group *echo.Group) {
for _, r := range p.p.routes {
h := r.Handler
group.Add(r.Method, r.Path, func(ectx echo.Context) error {
return h(ectx.(*Context))
})
}
group.Static("/plugins/"+p.p.Name+"/assets", PluginDir+"/"+p.p.Name+"/public/assets")
}
func (p *goPlugin) Inject(ctx *Context, name string, data RenderData) error {
if f, ok := p.p.injectFuncs["*"]; ok {
if err := f(ctx, data); err != nil {
return err
}
}
if f, ok := p.p.injectFuncs[name]; ok {
return f(ctx, data)
}
return nil
}
func (p *goPlugin) Close() error {
return nil
}
type goPluginRoute struct {
Method string
Path string
Handler HandlerFunc
}
// GoPlugin is a helper to create Go plugins.
//
// Use this struct to define your plugin, then call RegisterPluginLoader:
//
// p := GoPlugin{Name: "my-plugin"}
// // Define routes, template functions, etc
// alps.RegisterPluginLoader(p.Loader())
type GoPlugin struct {
Name string
routes []goPluginRoute
templateFuncs template.FuncMap
injectFuncs map[string]InjectFunc
}
// HandlerFunc is a function serving HTTP requests.
type HandlerFunc func(*Context) error
// AddRoute registers a new HTTP route.
func (p *GoPlugin) AddRoute(method, path string, handler HandlerFunc) {
p.routes = append(p.routes, goPluginRoute{method, path, handler})
}
func (p *GoPlugin) DELETE(path string, handler HandlerFunc) {
p.AddRoute(http.MethodDelete, path, handler)
}
func (p *GoPlugin) GET(path string, handler HandlerFunc) {
p.AddRoute(http.MethodGet, path, handler)
}
func (p *GoPlugin) POST(path string, handler HandlerFunc) {
p.AddRoute(http.MethodPost, path, handler)
}
func (p *GoPlugin) PUT(path string, handler HandlerFunc) {
p.AddRoute(http.MethodPut, path, handler)
}
// TemplateFuncs registers new template functions.
func (p *GoPlugin) TemplateFuncs(funcs template.FuncMap) {
if p.templateFuncs == nil {
p.templateFuncs = make(template.FuncMap, len(funcs))
}
for k, f := range funcs {
p.templateFuncs[k] = f
}
}
// InjectFunc is a function that injects data prior to rendering a template.
type InjectFunc func(ctx *Context, data RenderData) error
// Inject registers a function to execute prior to rendering a template. The
// special name "*" matches any template.
func (p *GoPlugin) Inject(name string, f InjectFunc) {
if p.injectFuncs == nil {
p.injectFuncs = make(map[string]InjectFunc)
}
p.injectFuncs[name] = f
}
// Plugin returns an object implementing Plugin.
func (p *GoPlugin) Plugin() Plugin {
return &goPlugin{p}
}
// Loader returns a loader function for this plugin.
func (p *GoPlugin) Loader() PluginLoaderFunc {
return func(*Server) ([]Plugin, error) {
return []Plugin{p.Plugin()}, nil
}
}
|
