Restore compatible API for prune endpoints

* Restore correct API endpoint payloads including reclaimed space numbers
* Include tests for API prune endpoints
* Clean up function signatures with unused parameters
* Update swagger for /networks/prune

Fixes #8891

Signed-off-by: Jhon Honce <jhonce@redhat.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/pkg/api/handlers/compat/images_prune.go b/pkg/api/handlers/compat/images_prune.go
new file mode 100644
index 000000000..c7e84804b
--- /dev/null
+++ b/pkg/api/handlers/compat/images_prune.go
@@ -0,0 +1,75 @@
+package compat
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+
+	"github.com/containers/podman/v2/libpod"
+	"github.com/containers/podman/v2/pkg/api/handlers"
+	"github.com/containers/podman/v2/pkg/api/handlers/utils"
+	"github.com/docker/docker/api/types"
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
+)
+
+func PruneImages(w http.ResponseWriter, r *http.Request) {
+	var (
+		filters []string
+	)
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+
+	query := struct {
+		All     bool
+		Filters map[string][]string `schema:"filters"`
+	}{
+		// This is where you can override the golang default value for one of fields
+	}
+
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
+		return
+	}
+
+	for k, v := range query.Filters {
+		for _, val := range v {
+			filters = append(filters, fmt.Sprintf("%s=%s", k, val))
+		}
+	}
+	imagePruneReports, err := runtime.ImageRuntime().PruneImages(r.Context(), query.All, filters)
+	if err != nil {
+		utils.InternalServerError(w, err)
+		return
+	}
+
+	idr := make([]types.ImageDeleteResponseItem, len(imagePruneReports))
+	var reclaimedSpace uint64
+	var errorMsg bytes.Buffer
+	for _, p := range imagePruneReports {
+		if p.Err != nil {
+			// Docker stops on first error vs. libpod which keeps going. Given API constraints, concatenate all errors
+			// and return that string.
+			errorMsg.WriteString(p.Err.Error())
+			errorMsg.WriteString("; ")
+			continue
+		}
+
+		idr = append(idr, types.ImageDeleteResponseItem{
+			Deleted: p.Id,
+		})
+		reclaimedSpace = reclaimedSpace + p.Size
+	}
+	if errorMsg.Len() > 0 {
+		utils.InternalServerError(w, errors.New(errorMsg.String()))
+		return
+	}
+
+	payload := handlers.ImagesPruneReport{
+		ImagesPruneReport: types.ImagesPruneReport{
+			ImagesDeleted:  idr,
+			SpaceReclaimed: reclaimedSpace,
+		},
+	}
+	utils.WriteResponse(w, http.StatusOK, payload)
+}