1 files changed, 117 insertions, 0 deletions

diff --git a/lib/output.h b/lib/output.h
new file mode 100644
index 00000000..c63c8e3f
--- /dev/null
+++ b/lib/output.h
@@ -0,0 +1,117 @@
+#pragma once
+
+#include "../config.h"
+#include "./perfdata.h"
+#include "./states.h"
+
+/*
+ * A partial check result
+ */
+typedef struct mp_subcheck mp_subcheck;
+struct mp_subcheck {
+        mp_state_enum state;         // OK, Warning, Critical ... set explicitly
+        mp_state_enum default_state; // OK, Warning, Critical .. if not set explicitly
+        bool state_set_explicitly;   // was the state set explicitly (or should it be derived from
+                                                                 // subchecks)
+
+        char *output;      // Text output for humans ("Filesystem xyz is fine", "Could not create TCP
+                                           // connection to..")
+        pd_list *perfdata; // Performance data for this check
+        struct subcheck_list *subchecks; // subchecks deeper in the hierarchy
+
+        // the evaluation_functions computes the state of subcheck
+        mp_state_enum (*evaluation_function)(mp_subcheck);
+};
+
+/*
+ * A list of subchecks, used in subchecks and the main check
+ */
+typedef struct subcheck_list {
+        mp_subcheck subcheck;
+        struct subcheck_list *next;
+} mp_subcheck_list;
+
+/*
+ * Possible output formats
+ */
+typedef enum output_format {
+        MP_FORMAT_MULTI_LINE,
+        MP_FORMAT_TEST_JSON,
+} mp_output_format;
+
+#define MP_FORMAT_DEFAULT MP_FORMAT_MULTI_LINE
+
+/*
+ * Format related functions
+ */
+void mp_set_format(mp_output_format format);
+mp_output_format mp_get_format(void);
+
+// Output detail level
+
+typedef enum output_detail_level {
+        MP_DETAIL_ALL,
+        MP_DETAIL_NON_OK_ONLY,
+} mp_output_detail_level;
+
+void mp_set_level_of_detail(mp_output_detail_level level);
+mp_output_detail_level mp_get_level_of_detail(void);
+
+/*
+ * The main state object of a plugin. Exists only ONCE per plugin.
+ * This is the "root" of a tree of singular checks.
+ * The final result is always derived from the children and the "worst" state
+ * in the first layer of subchecks
+ */
+typedef struct mp_check mp_check;
+struct mp_check {
+        char *summary; // Overall summary, if not set a summary will be automatically generated
+        mp_subcheck_list *subchecks;
+
+        // the evaluation_functions computes the state of check
+        mp_state_enum (*evaluation_function)(mp_check);
+};
+
+mp_check mp_check_init(void);
+mp_subcheck mp_subcheck_init(void);
+
+mp_subcheck mp_set_subcheck_state(mp_subcheck, mp_state_enum);
+mp_subcheck mp_set_subcheck_default_state(mp_subcheck, mp_state_enum);
+
+int mp_add_subcheck_to_check(mp_check check[static 1], mp_subcheck);
+int mp_add_subcheck_to_subcheck(mp_subcheck check[static 1], mp_subcheck);
+
+void mp_add_perfdata_to_subcheck(mp_subcheck check[static 1], mp_perfdata);
+
+void mp_add_summary(mp_check check[static 1], char *summary);
+
+mp_state_enum mp_compute_check_state(mp_check);
+mp_state_enum mp_compute_subcheck_state(mp_subcheck);
+
+mp_state_enum mp_eval_ok(mp_check overall);
+mp_state_enum mp_eval_warning(mp_check overall);
+mp_state_enum mp_eval_critical(mp_check overall);
+mp_state_enum mp_eval_unknown(mp_check overall);
+mp_state_enum mp_eval_check_default(mp_check check);
+mp_state_enum mp_eval_subcheck_default(mp_subcheck subcheck);
+
+typedef struct {
+        bool parsing_success;
+        mp_output_format output_format;
+} parsed_output_format;
+parsed_output_format mp_parse_output_format(char *format_string);
+
+// TODO free and stuff
+// void mp_cleanup_check(mp_check check[static 1]);
+
+char *mp_fmt_output(mp_check);
+
+void mp_print_output(mp_check);
+
+/*
+ * ==================
+ * Exit functionality
+ * ==================
+ */
+
+void mp_exit(mp_check) __attribute__((noreturn));