[pkg/ottl] Add minute converter (open-telemetry#33200)

**Description:**

This adds in a Minute converter that takes a time.Time and returns the
int minute component. Analogous to what we already have with Hour

**Link to tracking Issue:**
open-telemetry#33106

**Testing:** Added two unit tests based on the existing Hour ones

**Documentation:** Added the new converter to the ottlfuncs README.md

---------

Signed-off-by: sinkingpoint <[email protected]>
Co-authored-by: Tyler Helmuth <[email protected]>

.chloggen/sinkingpoint_add-minute-converter.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: pkg/ottl
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Adds a `Minute` converter for extracting the int minute component from a time.Time
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [33106]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

pkg/ottl/ottlfuncs/README.md

@@ -399,6 +399,7 @@ Available Converters:
 - [Log](#log)
 - [Microseconds](#microseconds)
 - [Milliseconds](#milliseconds)
+- [Minute](#minute)
 - [Minutes](#minutes)
 - [Month](#month)
 - [Nanoseconds](#nanoseconds)
@@ -826,6 +827,20 @@ Examples:
 
 - `Milliseconds(Duration("1h"))`
 
+### Minute
+
+`Minute(value)`
+
+The `Minute` Converter returns the minute component from the specified time using the Go stdlib [`time.Minute` function](https://pkg.go.dev/time#Time.Minute).
+
+`value` is a `time.Time`. If `value` is another type, an error is returned.
+
+The returned type is `int64`.
+
+Examples:
+
+- `Minute(Now())`
+
 ### Minutes
 
 `Minutes(value)`

pkg/ottl/ottlfuncs/func_minute.go

@@ -0,0 +1,39 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package ottlfuncs // import "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/ottl/ottlfuncs"
+
+import (
+ "context"
+ "fmt"
+
+ "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/ottl"
+)
+
+type MinuteArguments[K any] struct {
+ Time ottl.TimeGetter[K]
+}
+
+func NewMinuteFactory[K any]() ottl.Factory[K] {
+ return ottl.NewFactory("Minute", &MinuteArguments[K]{}, createMinuteFunction[K])
+}
+
+func createMinuteFunction[K any](_ ottl.FunctionContext, oArgs ottl.Arguments) (ottl.ExprFunc[K], error) {
+ args, ok := oArgs.(*MinuteArguments[K])
+
+ if !ok {
+ return nil, fmt.Errorf("MinuteFactory args must be of type *MinuteArguments[K]")
+ }
+
+ return Minute(args.Time)
+}
+
+func Minute[K any](time ottl.TimeGetter[K]) (ottl.ExprFunc[K], error) {
+ return func(ctx context.Context, tCtx K) (any, error) {
+ t, err := time.Get(ctx, tCtx)
+ if err != nil {
+ return nil, err
+ }
+ return int64(t.Minute()), nil
+ }, nil
+}

pkg/ottl/ottlfuncs/func_minute_test.go

@@ -0,0 +1,54 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package ottlfuncs
+
+import (
+ "context"
+ "testing"
+ "time"
+
+ "github.com/stretchr/testify/assert"
+
+ "github.com/open-telemetry/opentelemetry-collector-contrib/pkg/ottl"
+)
+
+func Test_Minute(t *testing.T) {
+ tests := []struct {
+ name string
+ time ottl.TimeGetter[any]
+ expected int64
+ }{
+ {
+ name: "some time",
+ time: &ottl.StandardTimeGetter[any]{
+ Getter: func(_ context.Context, _ any) (any, error) {
+ return time.Date(2006, time.January, 2, 15, 4, 5, 0, time.UTC), nil
+ },
+ },
+ expected: 4,
+ },
+ }
+ for _, tt := range tests {
+ t.Run(tt.name, func(t *testing.T) {
+ exprFunc, err := Minute(tt.time)
+ assert.NoError(t, err)
+ result, err := exprFunc(nil, nil)
+ assert.NoError(t, err)
+ assert.Equal(t, tt.expected, result)
+ })
+ }
+}
+
+func Test_Minute_Error(t *testing.T) {
+ var getter ottl.TimeGetter[any] = &ottl.StandardTimeGetter[any]{
+ Getter: func(_ context.Context, _ any) (any, error) {
+ return "not a time", nil
+ },
+ }
+ exprFunc, err := Minute(getter)
+ assert.NoError(t, err)
+ result, err := exprFunc(context.Background(), nil)
+ assert.Nil(t, result)
+ assert.Error(t, err)
+}

pkg/ottl/ottlfuncs/functions.go

@@ -57,6 +57,7 @@ func converters[K any]() []ottl.Factory[K] {
  NewLogFactory[K](),
  NewMicrosecondsFactory[K](),
  NewMillisecondsFactory[K](),
+ NewMinuteFactory[K](),
  NewMinutesFactory[K](),
  NewMonthFactory[K](),
  NewNanosecondsFactory[K](),