+#include <config.h>
+
+typedef enum {
+ // We could not determine the content of the JSON file. This typically
+ // means it’s unreadable or contains garbage.
+ JSON_CONTENT_UNKNOWN = 0,
+
+ // The JSON file contains a “normal” container, i.e. a container to be
+ // appended to an existing workspace (or split container!).
+ JSON_CONTENT_CON = 1,
+
+ // The JSON file contains a workspace container, which needs to be appended
+ // to the output (next to the other workspaces) with special care to avoid
+ // naming conflicts and ensuring that the workspace _has_ a name.
+ JSON_CONTENT_WORKSPACE = 2,
+} json_content_t;
+
+/* Parses the given JSON file until it encounters the first “type” property to
+ * determine whether the file contains workspaces or regular containers, which
+ * is important to know when deciding where (and how) to append the contents.
+ * */
+json_content_t json_determine_content(const char *buf, const size_t len);
+
+/**
+ * Returns true if the provided JSON could be parsed by yajl.
+ *
+ */
+bool json_validate(const char *buf, const size_t len);
+
+void tree_append_json(Con *con, const char *buf, const size_t len, char **errormsg);