1 files changed, 117 insertions, 3 deletions
diff --git a/src/cmd-instance.c b/src/cmd-instance.c
index 9e346e2..89494af 100644
--- a/src/cmd-instance.c
+++ b/src/cmd-instance.c
@@ -1,11 +1,126 @@
 #include "commands.h"
-#include "src/command.h"
+#include "command.h"
+#include "instance.h"
+#include "l2su.h"
+
 #include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdbool.h>
 
 unsigned cmd_instance_add(struct l2_context_node *ctx, char **args)
 {
+  int res = l2_instance_load_all();
+  char *name = NULL;
+  char *path = NULL;
+  char *newpath = NULL;
+  uuid_t uuid;
+  char uuidstr[UUID_STRLEN+1];
+
+  if (res != INSTANCE_SUCCESS) {
+    if (res == INSTANCE_ERRNO) {
+      fprintf(stderr, "fatal: Error loading instances: %s", strerror(errno));
+    } else {
+      fprintf(stderr, "fatal: Error loading instances (%d)\n", res);
+    }
+    return CMD_RESULT_FAIL;
+  }
+  
+  /* get the name and path (if it exists) */
+  for (struct l2_context_node *cur = ctx; cur; cur = cur->next) {
+    if (cur->node->type != CMD_NODE_TYPE_ARGUMENT) continue;
+    if (!strcmp("name", cur->node->name)) {
+      name = cur->value;
+    } else if (!strcmp("location", cur->node->name)) {
+      path = cur->value;
+    }
+  }
+
+  /* make sure the name and path make sense (path should be an absolute path, name shouldn't be empty) */
+  if (!name || !*name) {
+    fputs("fatal: The specified name is invalid\n", stderr);
+    return CMD_RESULT_FAIL;
+  }
+
+  for (char *cur = name; *cur; ++cur) {
+    if (*cur < ' ') {
+      fputs("fatal: The specified name contains invalid characters\n", stderr);
+      return CMD_RESULT_FAIL;
+    }
+  }
+
+  /* make sure there is not a profile with that name already */
+  for (struct l2_instance *cur = l2_state.instance_head; cur; cur = cur->next) {
+    if (!strcmp(cur->name, name)) {
+      fprintf(stderr, "fatal: An instance by the name '%s' already exists.\n", cur->name);
+      return CMD_RESULT_FAIL;
+    }
+  }
+
+  /* also find an unused UUID through rejection sampling */
+  bool found;
+  do {
+    found = false;
+    l2_uuid_random(&uuid);
+    for (struct l2_instance *cur = l2_state.instance_head; cur; cur = cur->next) {
+      if (!l2_uuid_compare(&cur->uuid, &uuid)) {
+        found = true;
+        break;
+      }
+    }
+  } while (found);
+
+  /* create the directory at "path" (if it isn't empty, complain) */
+  if (path && *path != '/') {
+    fputs("fatal: Specified path is not an absolute path\n", stderr);
+    return CMD_RESULT_FAIL;
+  } else if (!path) {
+    newpath = strdup(l2_state.paths.data);
+    if (!newpath) {
+    newpath_append_fail:
+      free(newpath);
+      fprintf(stderr, "fatal: Allocation failed: %s\n", strerror(errno));
+      return CMD_RESULT_FAIL;
+    }
+
+    newpath = l2_launcher_strapp(newpath, "/instances/");
+    if (!newpath) goto newpath_append_fail;
+
+    l2_uuid_to_string(&uuid, uuidstr);
+    newpath = l2_launcher_strapp(newpath, uuidstr);
+    if (!newpath) goto newpath_append_fail;
+  }
+
+  /* TODO: now create the directory for realsies */
+
+  /* add the instance */
+
+  struct l2_instance inst;
+
+  inst.uuid = uuid;
+  inst.name = name;
+  inst.path = path ? path : newpath;
+
+  if ((res = l2_instance_add_instance(&inst)) != INSTANCE_SUCCESS) {
+    fprintf(stderr, "fatal: Failed to add instance (%d)\n", res);
+    res = CMD_RESULT_FAIL;
+    goto cleanup;
+  }
+
+  if ((res = l2_instance_save_all()) != INSTANCE_SUCCESS) {
+    fprintf(stderr, "fatal: Failed to add instance (%d)\n", res);
+    res = CMD_RESULT_FAIL;
+    goto cleanup;
+  }
+
   printf("add command yay\n");
-  return CMD_RESULT_SUCCESS;
+
+  res = CMD_RESULT_SUCCESS;
+
+cleanup:
+  free(newpath);
+  return res;
 }
 
 unsigned cmd_instance_remove(struct l2_context_node *ctx, char **args)
@@ -22,4 +137,3 @@ unsigned cmd_instance_rename(struct l2_context_node *ctx, char **args)
 {
   return CMD_RESULT_SUCCESS;
 }
-