Add a few new default functions

README.md

@@ -170,6 +170,7 @@ Functions used in a template can accept any number of arguments but are limited
 Salix includes several useful global functions in all templates:
 
 - `len(v any) int`: Returns the length of the value passed in. If the length can't be found for the value passed in, it returns an error.
+- `json(v any) string`: Returns a JSON string for the value passed in.
 - `toUpper(s string) string`: Returns `s`, but with all characters mapped to their uppercase equivalents.
 - `toLower(s string) string`: Returns `s`, but with all characters mapped to their lowercase equivalents.
 - `hasPrefix(s, prefix string) bool`: Returns true if `s` starts with `prefix`.
@@ -181,6 +182,8 @@ Salix includes several useful global functions in all templates:
 - `count(s, substr string) int`: Returns the amount of times that `substr` appears in `s`.
 - `split(s, sep string) []string`: Returns a slice containing all substrings separated by `sep`.
 - `join(ss []string, sep string) string`: Returns a string with all substrings in `ss` joined by `sep`.
+- `replace(s, old, new string, n int)`: Returns a string with `n` occurrences of `old` in `s` replaced with `new`.
+- `replaceAll(s, old, new string)`: Returns a string with all occurrences of `old` in `s` replaced with `new`.
 
 ### Adding Custom Functions
 

vars.go

@@ -1,6 +1,7 @@
 package salix
 
 import (
+	"encoding/json"
 	"fmt"
 	"reflect"
 	"strings"
@@ -8,6 +9,7 @@ import (
 
 var globalVars = map[string]any{
 	"len":        tmplLen,
+	"json":       tmplJSON,
 	"toUpper":    strings.ToUpper,
 	"toLower":    strings.ToLower,
 	"hasPrefix":  strings.HasPrefix,
@@ -19,6 +21,8 @@ var globalVars = map[string]any{
 	"count":      strings.Count,
 	"split":      strings.Split,
 	"join":       strings.Join,
+	"replace":    strings.Replace,
+	"replaceAll": strings.ReplaceAll,
 	"sprintf":    fmt.Sprintf,
 }
 
@@ -31,3 +35,8 @@ func tmplLen(v any) (int, error) {
 		return 0, fmt.Errorf("cannot get length of %T", v)
 	}
 }
+
+func tmplJSON(v any) (string, error) {
+	data, err := json.Marshal(v)
+	return string(data), err
+}