Add exported response structures for API results

Currently the responses are all embedded in the weldr API functions.
They need to be usable by the client helper functions so I'm copying
them here and giving them names.

A later commit will go through the API can refactor it to use these
instead of the embedded ones.

internal/client/json.go

@@ -0,0 +1,77 @@
+// Package client - json contains Exported API response structures
+// Copyright (C) 2020 by Red Hat, Inc.
+package client
+
+import (
+	"github.com/osbuild/osbuild-composer/internal/blueprint"
+	"github.com/osbuild/osbuild-composer/internal/rpmmd"
+)
+
+// StatusV0 is the response to /api/status from a v0+ server
+type StatusV0 struct {
+	API           string   `json:"api"`
+	DBSupported   bool     `json:"db_supported"`
+	DBVersion     string   `json:"db_version"`
+	SchemaVersion string   `json:"schema_version"`
+	Backend       string   `json:"backend"`
+	Build         string   `json:"build"`
+	Messages      []string `json:"messages"`
+}
+
+// BlueprintsListV0 is the response to /blueprints/list request
+type BlueprintsListV0 struct {
+	Total      uint     `json:"total"`
+	Offset     uint     `json:"offset"`
+	Limit      uint     `json:"limit"`
+	Blueprints []string `json:"blueprints"`
+}
+
+// ResponseError holds the API response error details
+type ResponseError struct {
+	Code int    `json:"code,omitempty"`
+	ID   string `json:"id"`
+	Msg  string `json:"msg"`
+}
+
+// BlueprintsInfoV0 is the response to /blueprints/info?format=json request
+type BlueprintsInfoV0 struct {
+	Blueprints []blueprint.Blueprint `json:"blueprints"`
+	Changes    []infoChange          `json:"changes"`
+	Errors     []ResponseError       `json:"errors"`
+}
+type infoChange struct {
+	Changed bool   `json:"changed"`
+	Name    string `json:"name"`
+}
+
+// BlueprintsChangesV0 is the response to /blueprints/changes/ request
+type BlueprintsChangesV0 struct {
+	BlueprintsChanges []bpChange      `json:"blueprints"`
+	Errors            []ResponseError `json:"errors"`
+	Limit             uint            `json:"limit"`
+	Offset            uint            `json:"offset"`
+}
+type bpChange struct {
+	Changes []blueprint.Change `json:"changes"`
+	Name    string             `json:"name"`
+	Total   int                `json:"total"`
+}
+
+// BlueprintsDepsolveV0 is the response to /blueprints/depsolve/ request
+type BlueprintsDepsolveV0 struct {
+	Blueprints []depsolveEntry `json:"blueprints"`
+	Errors     []ResponseError `json:"errors"`
+}
+type depsolveEntry struct {
+	Blueprint    blueprint.Blueprint `json:"blueprint"`
+	Dependencies []rpmmd.PackageSpec `json:"dependencies"`
+}
+
+// BlueprintsFreezeV0 is the response to /blueprints/freeze/ request
+type BlueprintsFreezeV0 struct {
+	Blueprints []blueprintFrozen `json:"blueprints"`
+	Errors     []ResponseError   `json:"errors"`
+}
+type blueprintFrozen struct {
+	Blueprint blueprint.Blueprint `json:"blueprint"`
+}