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package funcs
import (
"time"
"github.com/zclconf/go-cty/cty"
"github.com/zclconf/go-cty/cty/function"
)
// TimestampFunc constructs a function that returns a string representation of the current date and time.
var TimestampFunc = function.New(&function.Spec{
Params: []function.Parameter{},
Type: function.StaticReturnType(cty.String),
Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
return cty.StringVal(time.Now().UTC().Format(time.RFC3339)), nil
},
})
// TimeAddFunc constructs a function that adds a duration to a timestamp, returning a new timestamp.
var TimeAddFunc = function.New(&function.Spec{
Params: []function.Parameter{
{
Name: "timestamp",
Type: cty.String,
},
{
Name: "duration",
Type: cty.String,
},
},
Type: function.StaticReturnType(cty.String),
Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
ts, err := time.Parse(time.RFC3339, args[0].AsString())
if err != nil {
return cty.UnknownVal(cty.String), err
}
duration, err := time.ParseDuration(args[1].AsString())
if err != nil {
return cty.UnknownVal(cty.String), err
}
return cty.StringVal(ts.Add(duration).Format(time.RFC3339)), nil
},
})
// Timestamp returns a string representation of the current date and time.
//
// In the Terraform language, timestamps are conventionally represented as
// strings using RFC 3339 "Date and Time format" syntax, and so timestamp
// returns a string in this format.
func Timestamp() (cty.Value, error) {
return TimestampFunc.Call([]cty.Value{})
}
// TimeAdd adds a duration to a timestamp, returning a new timestamp.
//
// In the Terraform language, timestamps are conventionally represented as
// strings using RFC 3339 "Date and Time format" syntax. Timeadd requires
// the timestamp argument to be a string conforming to this syntax.
//
// `duration` is a string representation of a time difference, consisting of
// sequences of number and unit pairs, like `"1.5h"` or `1h30m`. The accepted
// units are `ns`, `us` (or `µs`), `"ms"`, `"s"`, `"m"`, and `"h"`. The first
// number may be negative to indicate a negative duration, like `"-2h5m"`.
//
// The result is a string, also in RFC 3339 format, representing the result
// of adding the given direction to the given timestamp.
func TimeAdd(timestamp cty.Value, duration cty.Value) (cty.Value, error) {
return TimeAddFunc.Call([]cty.Value{timestamp, duration})
}
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