62 lines
1.2 KiB
Go
62 lines
1.2 KiB
Go
package push
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import (
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"errors"
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"fmt"
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"regexp"
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"strings"
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"github.com/andig/evcc/api"
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)
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var log = api.NewLogger("push")
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type EventId int
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const (
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ChargeStart EventId = iota
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ChargeStop
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)
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type Event struct {
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EventId EventId
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Sender string
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Attributes map[string]interface{}
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}
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func (e Event) Apply(template string) (string, error) {
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return replaceFormatted(template, e.Attributes)
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}
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var re = regexp.MustCompile(`\${(\w+)(:([a-zA-Z0-9%.]+))?}`)
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// replaceFormatted replaces all occurrances of ${key} with val from the kv map.
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// All keys of kv must exist inside the string to apply replacements to
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func replaceFormatted(s string, kv map[string]interface{}) (string, error) {
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matches := re.FindAllStringSubmatch(s, -1)
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for len(matches) > 0 {
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for _, m := range matches {
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key := m[1]
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val, ok := kv[key]
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if !ok {
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return "", errors.New("could not find match for " + m[0])
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}
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// apply format
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format := m[3]
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if format != "" {
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val = fmt.Sprintf(format, val)
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}
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// update string
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literalMatch := m[0]
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s = strings.ReplaceAll(s, literalMatch, fmt.Sprintf("%v", val))
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}
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// update matches
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matches = re.FindAllStringSubmatch(s, -1)
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}
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return s, nil
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}
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