website/pkg/templates/template_funcs.go

127 lines
3.0 KiB
Go
Raw Normal View History

package templates
import (
"fmt"
"html/template"
"net/http"
"net/url"
"strings"
"time"
2022-08-26 04:21:46 +00:00
"code.nonshy.com/nonshy/website/pkg/config"
"code.nonshy.com/nonshy/website/pkg/markdown"
"code.nonshy.com/nonshy/website/pkg/photo"
"code.nonshy.com/nonshy/website/pkg/session"
"code.nonshy.com/nonshy/website/pkg/utility"
)
// TemplateFuncs available to all pages.
func TemplateFuncs(r *http.Request) template.FuncMap {
return template.FuncMap{
"InputCSRF": InputCSRF(r),
"SincePrettyCoarse": SincePrettyCoarse(),
"ComputeAge": utility.Age,
"Split": strings.Split,
"ToMarkdown": ToMarkdown,
"PhotoURL": photo.URLPath,
"Now": time.Now,
"PrettyTitle": func() template.HTML {
return template.HTML(fmt.Sprintf(
`<strong style="color: #0077FF">non</strong>` +
`<strong style="color: #FF77FF">shy</strong>`,
))
},
"Pluralize64": func(count int64, labels ...string) string {
if len(labels) < 2 {
labels = []string{"", "s"}
}
if count == 1 {
return labels[0]
} else {
return labels[1]
}
},
"PluralizeU64": func(count uint64, labels ...string) string {
if len(labels) < 2 {
labels = []string{"", "s"}
}
if count == 1 {
return labels[0]
} else {
return labels[1]
}
},
"Pluralize": func(count int, labels ...string) string {
if len(labels) < 2 {
labels = []string{"", "s"}
}
if count == 1 {
return labels[0]
} else {
return labels[1]
}
},
2022-08-14 00:42:42 +00:00
"Substring": func(value string, n int) string {
if n > len(value) {
return value
}
return value[:n]
},
"TrimEllipses": func(value string, n int) string {
if n > len(value) {
return value
}
return value[:n] + "…"
},
"IterRange": func(start, n int) []int {
var result = []int{}
for i := start; i <= n; i++ {
result = append(result, i)
}
return result
},
"SubtractInt": func(a, b int) int {
return a - b
},
"UrlEncode": func(values ...interface{}) string {
var result string
for _, value := range values {
result += url.QueryEscape(fmt.Sprintf("%v", value))
}
return result
},
}
}
// InputCSRF returns the HTML snippet for a CSRF token hidden input field.
func InputCSRF(r *http.Request) func() template.HTML {
return func() template.HTML {
ctx := r.Context()
if token, ok := ctx.Value(session.CSRFKey).(string); ok {
return template.HTML(fmt.Sprintf(
`<input type="hidden" name="%s" value="%s">`,
config.CSRFInputName,
token,
))
} else {
return template.HTML(`[CSRF middleware error]`)
}
}
}
// SincePrettyCoarse formats a time.Duration in plain English. Intended for "joined 2 months ago" type
// strings - returns the coarsest level of granularity.
func SincePrettyCoarse() func(time.Time) template.HTML {
return func(since time.Time) template.HTML {
return template.HTML(utility.FormatDurationCoarse(time.Since(since)))
}
}
// ToMarkdown renders input text as Markdown.
func ToMarkdown(input string) template.HTML {
return template.HTML(markdown.Render(input))
}