src: add used_size and free_size to partition data

Extend database table ordenadores_particiones to add new "used_size" and "free_size" fields.

  FIELD       TYPE
| tamano    | bigint   |
| uso       | tinyint  |
| used_size | bigint   |
| free_size | bigint   |

"tamano" is the field storing the total size of the partition.
"uso" is a field storing the integer percentage of use, it is preserved for backwards compatibility with scritps that access the database.
"used_size" and "free_size" contain the used and free partition
size in bytes.

Old response from ogClient for /cache/delete, /cache/fetch
and /image/restore:
{
  'cache': [
    {'name': 'windows.img', 'size': 2432370213, checksum: '5d4dcc677bc19f40a647d0002f4ade90'},
    {'name': 'linux.img', 'size': 243234534213, checksum: '3eb22f888f88a55ad954f55644e1192e'}
  ]
}

New response:
{
  'cache': {
    'used_size': 4520232322423,
    'free_size': 48273465287452945,
    'images': [
      {'name': 'windows.img', 'size': 2432370213, checksum: '5d4dcc677bc19f40a647d0002f4ade90'},
      {'name': 'linux.img', 'size': 243234534213, checksum: '3eb22f888f88a55ad954f55644e1192e'}
    ]
  }
}

Parse the new "free_size" and "used_size" fields of each partition data in the response payload of /refresh

Parse "free_size" and "used_size" fields of the cache data in the reponse payload of /image/restore, /cache/delete and /cache/fetch

Replace "used_size" field of GET /client/setup with the value
of the new database field "used_size"

1 files changed, 43 insertions, 2 deletions

diff --git a/src/json.c b/src/json.c
index d33c647..05b725c 100644
--- a/src/json.c
+++ b/src/json.c
@@ -128,8 +128,11 @@ int og_json_parse_partition(json_t *element, struct og_partition *part,
 			err = og_json_parse_string(value, &part->os);
 			flags |= OG_PARAM_PART_OS;
 		} else if (!strcmp(key, "used_size")) {
-			err = og_json_parse_string(value, &part->used_size);
+			err = og_json_parse_uint64(value, &part->used_size);
 			flags |= OG_PARAM_PART_USED_SIZE;
+		} else if (!strcmp(key, "free_size")) {
+			err = og_json_parse_uint64(value, &part->free_size);
+			flags |= OG_PARAM_PART_FREE_SIZE;
 		}
 
 		if (err < 0)
@@ -248,7 +251,7 @@ void og_cache_image_free(struct list_head *cache_list)
 	}
 }
 
-int og_json_parse_cache(json_t *element, struct list_head *cache_list)
+static int og_json_parse_cache_images(json_t *element, struct list_head *cache_list)
 {
 	uint64_t required_flags = OG_PARAM_IMG_NAME | OG_PARAM_IMG_SIZE | OG_PARAM_IMG_CHECKSUM;
 	struct og_cache_image *cache_item;
@@ -305,6 +308,44 @@ int og_json_parse_cache(json_t *element, struct list_head *cache_list)
 	return err;
 }
 
+int og_json_parse_cache(json_t *element, struct og_cache_data *cache_data, struct list_head *cache_list)
+{
+	uint64_t required_flags = OG_PARAM_CACHE_FREE_SIZE | OG_PARAM_CACHE_USED_SIZE | OG_PARAM_CACHE_IMAGES;
+	uint64_t flags = 0UL;
+	const char *key;
+	json_t *value;
+	int err = 0;
+
+	if (json_typeof(element) != JSON_OBJECT)
+		return -1;
+
+	if (json_object_size(element) == 0)
+		return 0;
+
+	json_object_foreach(element, key, value) {
+		if (!strcmp(key, "used_size")) {
+			err = og_json_parse_uint64(value, &cache_data->used_size);
+			flags |= OG_PARAM_CACHE_USED_SIZE;
+		} else if (!strcmp(key, "free_size")) {
+			err = og_json_parse_uint64(value, &cache_data->free_size);
+			flags |= OG_PARAM_CACHE_FREE_SIZE;
+		} else if (!strcmp(key, "images")) {
+			err = og_json_parse_cache_images(value, cache_list);
+			flags |= OG_PARAM_CACHE_IMAGES;
+		} else
+			err = -1;
+
+		if (err < 0) {
+			return err;
+		}
+	}
+
+	if ((flags & required_flags) != required_flags)
+		return -1;
+
+	return err;
+}
+
 void og_boot_entry_free(struct list_head *boot_entry_list)
 {
 	struct og_boot_entry *boot_entry, *tmp;