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#include "instance.h"
#include "l2su.h"
#include "uuid/uuid.h"
#include <stdlib.h>
#include <jansson.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
int l2_instance__load_all_from_object(json_t *obj);
json_t *l2_instance__save_all_to_object(void);
/* da main functionality */
int l2_instance_load_all(void)
{
/* open + openat because I am too lazy to concatenate the path with the filename */
int instfd = l2_launcher_open_config("instance.json", O_RDONLY, 0);
if (instfd < 0) {
return errno == ENOENT ? INSTANCE_SUCCESS : INSTANCE_ERRNO;
}
json_error_t jserr;
json_t *js = json_loadfd(instfd, JSON_REJECT_DUPLICATES, &jserr);
if (!js) {
fprintf(stderr, "error: JSON error in instance.json: %s (%s:%d:%d)\n", jserr.text, jserr.source, jserr.line, jserr.column);
return INSTANCE_EJSON;
}
if (!json_is_object(js)) {
fprintf(stderr, "error: instances.json value is not an object (is actually %d)\n", json_typeof(js));
json_decref(js);
return INSTANCE_EFORMAT;
}
int res = l2_instance__load_all_from_object(js);
json_decref(js);
return res;
}
int l2_instance_save_all(void)
{
json_t *js = NULL;
int instfd = l2_launcher_open_config("instance.json", O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (instfd < 0) return INSTANCE_ERRNO;
int retval = INSTANCE_SUCCESS;
js = l2_instance__save_all_to_object();
if (!js) {
retval = INSTANCE_EJSON;
goto save_done;
}
if (json_dumpfd(js, instfd, JSON_INDENT(4)) < 0) {
retval = INSTANCE_EJSON;
}
save_done:
close(instfd);
json_decref(js);
return retval;
}
/* public utilities */
int l2_instance_add_instance(const struct l2_instance *inst)
{
char *path = strdup(inst->path);
if (!path) return INSTANCE_ERRNO;
char *name = strdup(inst->name);
if (!name) {
free(path);
return INSTANCE_ERRNO;
}
struct l2_instance *newinst = calloc(1, sizeof(struct l2_instance));
if (!newinst) {
free(path);
free(name);
return INSTANCE_ERRNO;
}
newinst->uuid = inst->uuid;
newinst->path = path;
newinst->name = name;
if (l2_state.instance_head && l2_state.instance_tail) {
l2_state.instance_tail->next = newinst;
newinst->prev = l2_state.instance_tail;
l2_state.instance_tail = newinst;
} else {
l2_state.instance_head = l2_state.instance_tail = newinst;
}
return INSTANCE_SUCCESS;
}
int l2_instance_del_instance(struct l2_instance *inst)
{
if (inst->next) {
inst->next->prev = inst->prev;
} else {
l2_state.instance_tail = inst->prev;
}
if (inst->prev) {
inst->prev->next = inst->next;
} else {
l2_state.instance_head = inst->next;
}
free((char *)inst->name); /* okay to cast away const because any instance in the list will be allocated with strdup */
free((char *)inst->path);
free(inst);
return INSTANCE_SUCCESS;
}
int l2_instance_rename_instance(struct l2_instance *inst, const char *newname)
{
char *nn = strdup(newname);
if (!nn) return INSTANCE_ERRNO;
free((char *)inst->name);
inst->name = nn;
return INSTANCE_SUCCESS;
}
/* internal utilities */
int l2_instance__load_all_from_object(json_t *obj)
{
const char *key;
json_t *val;
json_t *tempval;
int res;
struct l2_instance inst;
json_object_foreach(obj, key, val) {
if (!json_is_object(val)) {
return INSTANCE_EFORMAT;
}
if (!l2_uuid_from_string(&inst.uuid, key)) {
return INSTANCE_EFORMAT; /* invalid UUID */
}
tempval = json_object_get(val, "name");
if (!json_is_string(tempval)) {
return INSTANCE_EFORMAT;
}
/* it's okay to discard const here because add_instance duplicates the string */
inst.name = (char *)json_string_value(tempval);
tempval = json_object_get(val, "path");
if (!json_is_string(tempval)) {
return INSTANCE_EFORMAT;
}
inst.path = (char *)json_string_value(tempval);
if ((res = l2_instance_add_instance(&inst)) != INSTANCE_SUCCESS) {
return res;
}
}
return INSTANCE_SUCCESS;
}
json_t *l2_instance__save_all_to_object(void)
{
json_t *obj = json_object();
json_t *jinst;
if (!obj) return NULL;
char uuidbuf[UUID_STRLEN + 1];
for (struct l2_instance *inst = l2_state.instance_head; inst; inst = inst->next) {
l2_uuid_to_string(&inst->uuid, uuidbuf);
if (json_object_set_new(obj, uuidbuf, jinst = json_object()) < 0) {
goto save_err; /* jinst is decref'd anyway (undocumented) */
}
if (json_object_set_new(jinst, "name", json_string(inst->name)) < 0) {
goto save_err;
}
if (json_object_set_new(jinst, "path", json_string(inst->path)) < 0) {
goto save_err;
}
}
return obj;
save_err:
json_decref(obj);
return NULL;
}
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