refactor: expose generated code and client business logic to share with Kapacitor (#103)

* refactor: take clients out of internal

* refactor: move stdio to pkg

* Move internal/api to api

* refactor: final changes for Kapacitor to access shared functionality

* chore: regenerate mocks

* fix: bad automated refactor

* chore: extra formatting not caught by make fmt

clients/delete/delete.go

@@ -0,0 +1,66 @@
+package delete
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/influxdata/influx-cli/v2/api"
+	"github.com/influxdata/influx-cli/v2/clients"
+)
+
+type Client struct {
+	clients.CLI
+	api.DeleteApi
+}
+
+type Params struct {
+	clients.OrgBucketParams
+	Predicate string
+	Start     string
+	Stop      string
+}
+
+var ErrMustSpecifyBucket = errors.New("must specify bucket ID or bucket name")
+
+func (c Client) Delete(ctx context.Context, params *Params) error {
+	if !params.OrgID.Valid() && params.OrgName == "" && c.ActiveConfig.Org == "" {
+		return clients.ErrMustSpecifyOrg
+	}
+	if !params.BucketID.Valid() && params.BucketName == "" {
+		return ErrMustSpecifyBucket
+	}
+	start, err := time.Parse(time.RFC3339Nano, params.Start)
+	if err != nil {
+		return fmt.Errorf("start time %q cannot be parsed as RFC3339Nano: %w", params.Start, err)
+	}
+	stop, err := time.Parse(time.RFC3339Nano, params.Stop)
+	if err != nil {
+		return fmt.Errorf("stop time %q cannot be parsed as RFC3339Nano: %w", params.Stop, err)
+	}
+
+	reqBody := api.NewDeletePredicateRequest(start, stop)
+	if params.Predicate != "" {
+		reqBody.SetPredicate(params.Predicate)
+	}
+
+	req := c.PostDelete(ctx).DeletePredicateRequest(*reqBody)
+	if params.OrgID.Valid() {
+		req = req.OrgID(params.OrgID.String())
+	} else if params.OrgName != "" {
+		req = req.Org(params.OrgName)
+	} else {
+		req = req.Org(c.ActiveConfig.Org)
+	}
+	if params.BucketID.Valid() {
+		req = req.BucketID(params.BucketID.String())
+	} else {
+		req = req.Bucket(params.BucketName)
+	}
+
+	if err := req.Execute(); err != nil {
+		return fmt.Errorf("failed to delete data: %w", err)
+	}
+	return nil
+}