gio file monitor doesn't work in cygwin :(

CMakeLists.txt

@@ -5,3 +5,4 @@ ADD_DEFINITIONS("-Wall -Werror -std=c99")
 ENABLE_TESTING()
 
 ADD_SUBDIRECTORY(lib)
+ADD_SUBDIRECTORY(edwatch)

edwatch/CMakeLists.txt

@@ -0,0 +1,17 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 3.24)
+PROJECT(edterm)
+
+SET(SOURCES
+  "edwatch.c"
+)
+
+INCLUDE_DIRECTORIES(
+  ${GLIB2_INCLUDE_DIRS}
+  ${EDAPI_INCLUDE_DIRS}
+)
+
+ADD_EXECUTABLE("edwatch" ${SOURCES})
+TARGET_LINK_LIBRARIES(
+  "edwatch"
+  "edapi"
+  )

edwatch/edwatch.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+
+#include <gio/gio.h>
+
+#include <edapi/journal/journal.h>
+#include <edapi/journal/entry.h>
+#include <edapi/journal/file.h>
+
+static EDJournal *journal = NULL;
+static GApplication *app = NULL;
+
+static void interrupt(int signal)
+{
+    if (app != NULL) {
+        g_application_release(app);
+    }
+}
+
+static void new_entry(EDJournal *sender, EDJournalFile *file,
+                      EDJournalEntry *entry, gpointer data)
+{
+    fprintf(stdout, "new event!\n");
+}
+
+static void activate(GApplication *self, gpointer data)
+{
+    gchar *location = NULL;
+    GError *error = NULL;
+
+    journal = ed_journal_new_with_location(location, &error);
+    if (journal == NULL) {
+        fprintf(stderr, "failed to open journal: %s\n",
+                error->message);
+        g_application_quit(self);
+        return;
+    }
+
+    g_signal_connect(journal, "new-entry", G_CALLBACK(new_entry), NULL);
+
+    g_application_hold(self);
+}
+
+int main(int ac, char **av)
+{
+    app = g_application_new("org.nola.edwatch", 0);
+    if (app == NULL) {
+        return 3;
+    }
+
+    signal(SIGINT, interrupt);
+    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
+
+    g_application_run(app, 0, NULL);
+
+    return 0;
+}

lib/CMakeLists.txt

@@ -18,6 +18,9 @@ SET(SOURCES
   "src/journal/journal.c"
 )
 
+SET(EDAPI_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/include"
+  CACHE STRING "EDAPI lib include dir")
+
 INCLUDE_DIRECTORIES(
   "include"
   ${GIO2_INCLUDE_DIRS}

lib/include/edapi/journal/file.h

@@ -33,10 +33,20 @@ EDErrorCode ed_journal_file_parse_filename(
  *
  * To fully load all entries call ed_journal_file_load().
  */
-EDErrorCode ed_journal_file_open(EDJournalFile *file,
+EDErrorCode ed_journal_file_peek(EDJournalFile *file,
                                  char const *filename,
                                  GError **error);
 
+/**
+ * Opens the file and seeks to its end. If any new entries are
+ * added by the game then ed_journal_file_read() will return new
+ * entries.
+ */
+EDErrorCode ed_journal_file_open_tail(EDJournalFile *self);
+void ed_journal_file_close(EDJournalFile *self);
+
+EDJournalEntry *ed_journal_file_read(EDJournalFile *self, GError **error);
+
 /**
  * Load all entries from this given journal.
  */

lib/include/edapi/journal/journal.h

@@ -13,12 +13,16 @@ G_DECLARE_FINAL_TYPE(
 
 #define ED_TYPE_JOURNAL ed_journal_get_type()
 
+gchar *ed_journal_determine_location(void);
+
 EDJournal *ed_journal_new(void);
 
-EDJournal *ed_journal_new_with_location(gchar const *dir);
+EDJournal *ed_journal_new_with_location(gchar const *dir, GError **error);
 
 gchar const *ed_journal_get_location(EDJournal *j);
-EDErrorCode ed_journal_set_location(EDJournal *j, gchar const *dir);
+
+void ed_journal_close(EDJournal *self);
+EDErrorCode ed_journal_open(EDJournal *j, gchar const *dir, GError **error);
 
 /**
  * Get a list of files. Files are sorted in ascending order, with

lib/src/journal/file.c

@@ -8,6 +8,7 @@
 
 typedef struct {
     gchar *filename;
+    GFile *file;
     gchar *datetime;
     GDateTime *timestamp;
     gint part;
@@ -15,6 +16,9 @@ typedef struct {
     EDCommander *commander;
     gchar *gameversion;
 
+    GDataInputStream *reader;
+    GFileInputStream *stream;
+
     EDJournalEntry *first;
     EDJournalEntry *last;
 } EDJournalFilePrivate;
@@ -40,8 +44,13 @@ static void ed_journal_file_dispose(GObject *obj)
     EDJournalFile *self = ED_JOURNALFILE(obj);
     EDJournalFilePrivate *p = ed_journal_file_get_instance_private(self);
 
+    g_clear_object(&p->file);
+    g_clear_object(&p->reader);
+    g_clear_object(&p->stream);
+
     g_clear_object(&p->first);
     g_clear_object(&p->last);
+
     g_clear_object(&p->commander);
 
     G_OBJECT_CLASS(ed_journal_file_parent_class)->dispose(obj);
@@ -215,6 +224,7 @@ static EDErrorCode ed_journal_file_parse_(EDJournalFile *self,
 
     g_free(p->filename);
     p->filename = g_strdup(filename);
+    p->file = g_file_new_for_path(p->filename);
 
     ret = ed_error_success;
 
@@ -257,7 +267,6 @@ static EDErrorCode ed_journal_file_read_first_(EDJournalFile *self)
     EDErrorCode ret = ed_error_internal;
     EDJournalFilePrivate *p = ed_journal_file_get_instance_private(self);
 
-    GFile *file = NULL;
     GFileInputStream *stream = NULL;
     GDataInputStream *reader = NULL;
     EDJournalEntry *entry = NULL;
@@ -265,10 +274,7 @@ static EDErrorCode ed_journal_file_read_first_(EDJournalFile *self)
     char *line = NULL;
     gsize linelen = 0;
 
-    file = g_file_new_for_path(p->filename);
+    stream = g_file_read(p->file, NULL, NULL);
-    goto_if_true(file == NULL, done);
-
-    stream = g_file_read(file, NULL, NULL);
     if (stream == NULL) {
         goto done;
     }
@@ -319,7 +325,6 @@ done:
 
     g_clear_object(&reader);
     g_clear_object(&stream);
-    g_clear_object(&file);
 
     return ret;
 }
@@ -524,7 +529,7 @@ done:
     return ret;
 }
 
-EDErrorCode ed_journal_file_open(EDJournalFile *file,
+EDErrorCode ed_journal_file_peek(EDJournalFile *file,
                                  char const *filename,
                                  GError **error)
 {
@@ -640,3 +645,78 @@ gboolean ed_journal_file_has_entries_in_range(EDJournalFile *self,
 
     return FALSE;
 }
+
+EDJournalEntry *ed_journal_file_read(EDJournalFile *self, GError **error)
+{
+    return_if_true(self == NULL, NULL);
+    EDJournalFilePrivate *p = ed_journal_file_get_instance_private(self);
+    GError *tmp = NULL;
+
+    if (p->reader == NULL) {
+        return NULL;
+    }
+
+    gchar *line = NULL;
+    gsize  linelen = 0;
+
+    line = g_data_input_stream_read_line_utf8(
+        p->reader, &linelen, NULL, &tmp);
+    if (line == NULL) {
+        g_propagate_error(error, tmp);
+        return NULL;
+    }
+
+    g_strchomp(line);
+    if (strlen(line) <= 0) {
+        g_free(line);
+        return NULL;
+    }
+
+    EDJournalEntry *entry = ed_journal_entry_new_parse(line, &tmp);
+    g_free(line);
+
+    if (entry == NULL) {
+        g_propagate_error(error, tmp);
+        return NULL;
+    }
+
+    return entry;
+}
+
+void ed_journal_file_close(EDJournalFile *self)
+{
+    return_if_true(self == NULL,);
+    EDJournalFilePrivate *p = ed_journal_file_get_instance_private(self);
+
+    g_clear_object(&p->stream);
+    g_clear_object(&p->reader);
+}
+
+EDErrorCode ed_journal_file_open_tail(EDJournalFile *self)
+{
+    return_if_true(self == NULL, ed_error_args);
+    EDJournalFilePrivate *p = ed_journal_file_get_instance_private(self);
+
+    EDErrorCode ret = ed_error_internal;
+
+    p->stream = g_file_read(p->file, NULL, NULL);
+    goto_if_true(p->stream == NULL, done);
+
+    p->reader = g_data_input_stream_new(G_INPUT_STREAM(p->stream));
+    goto_if_true(p->reader == NULL, done);
+
+    if (!g_seekable_seek(G_SEEKABLE(p->stream), 0, G_SEEK_END, NULL, NULL)) {
+        goto done;
+    }
+
+    ret = ed_error_success;
+
+done:
+
+    if (ED_ERROR(ret)) {
+        g_clear_object(&p->stream);
+        g_clear_object(&p->reader);
+    }
+
+    return ret;
+}

lib/src/journal/journal.c

@@ -2,9 +2,14 @@
 #include <edapi/journal/file.h>
 #include <edapi/util.h>
 
+#include <gio/gio.h>
+#include <stdio.h>
+
 typedef struct {
     gchar *location;
+    GFile *loc;
     GList *files;
+    GFileMonitor *monitor;
 } EDJournalPrivate;
 
 struct _EDJournal {
@@ -23,6 +28,10 @@ G_DEFINE_TYPE_EXTENDED(
     G_ADD_PRIVATE(EDJournal)
     );
 
+static void ed_journal_changed(GFileMonitor *self, GFile *file, GFile *other,
+                               GFileMonitorEvent event,
+                               gpointer user);
+
 static void ed_journal_finalize(GObject *obj)
 {
     EDJournal *self = ED_JOURNAL(obj);
@@ -34,12 +43,34 @@ static void ed_journal_finalize(GObject *obj)
     G_OBJECT_CLASS(ed_journal_parent_class)->finalize(obj);
 }
 
-static void ed_journal_class_init(EDJournalClass *klass)
+static void ed_journal_dispose(GObject *obj)
 {
-    G_OBJECT_CLASS(klass)->finalize = ed_journal_finalize;
+    EDJournal *self = ED_JOURNAL(obj);
+    EDJournalPrivate *p = ed_journal_get_instance_private(self);
+
+    g_clear_object(&p->loc);
+    g_clear_object(&p->monitor);
+
+    G_OBJECT_CLASS(ed_journal_parent_class)->dispose(obj);
 }
 
-static EDErrorCode ed_journal_determine_location(EDJournal *self)
+static void ed_journal_class_init(EDJournalClass *klass)
+{
+    g_signal_new("new-entry",
+                 G_TYPE_FROM_CLASS(klass),
+                 G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
+                 0, NULL, NULL, NULL,
+                 G_TYPE_NONE,
+                 2,
+                 ED_TYPE_JOURNALFILE,
+                 ED_TYPE_JOURNALENTRY
+        );
+
+    G_OBJECT_CLASS(klass)->finalize = ed_journal_finalize;
+    G_OBJECT_CLASS(klass)->dispose = ed_journal_dispose;
+}
+
+gchar *ed_journal_determine_location(void)
 {
     gchar *location = NULL;
     gchar *tmp = NULL;
@@ -67,22 +98,19 @@ static EDErrorCode ed_journal_determine_location(EDJournal *self)
     }
 
     if (S_EMPTY(location)) {
-        return ed_error_invalid;
+        return NULL;
     }
 
     if (!g_file_test(location, G_FILE_TEST_IS_DIR)) {
         g_free(location);
-        return ed_error_invalid;
+        return NULL;
     }
 
-    ed_journal_set_location(self, location);
+    return location;
-
-    return ed_error_success;
 }
 
 static void ed_journal_init(EDJournal *self)
 {
-    ed_journal_determine_location(self);
 }
 
 EDJournal *ed_journal_new(void)
@@ -90,19 +118,33 @@ EDJournal *ed_journal_new(void)
     return g_object_new(ED_TYPE_JOURNAL, NULL);
 }
 
-EDJournal *ed_journal_new_with_location(gchar const *dir)
+EDJournal *ed_journal_new_with_location(gchar const *dir, GError **error)
 {
     EDJournal *j = NULL;
     EDErrorCode ret = ed_error_success;
+    GError *tmp = NULL;
+
+    if (dir == NULL) {
+        gchar *loc = ed_journal_determine_location();
+        return_if_true(loc == NULL, NULL);
+
+        j = ed_journal_new_with_location(loc, error);
+        g_free(loc);
+
+        return j;
+    }
 
     j = ed_journal_new();
     return_if_true(j == NULL, NULL);
 
-    ret = ed_journal_set_location(j, dir);
+    if (!S_EMPTY(dir)) {
+        ret = ed_journal_open(j, dir, &tmp);
         if (ED_ERROR(ret)) {
+            g_propagate_error(error, tmp);
             g_clear_object(&j);
             return NULL;
         }
+    }
 
     return j;
 }
@@ -143,7 +185,7 @@ static void ed_journal_load_files(EDJournal *self)
         journalfile = ed_journal_file_new();
         goto_if_true(journalfile == NULL, next);
 
-        ret = ed_journal_file_open(journalfile, full, NULL);
+        ret = ed_journal_file_peek(journalfile, full, NULL);
         if (ED_SUCCESS(ret)) {
             p->files = g_list_append(p->files, journalfile);
         }
@@ -164,6 +206,40 @@ done:
     }
 }
 
+static EDErrorCode ed_journal_watch(EDJournal *self, GError **error)
+{
+    return_if_true(self == NULL, ed_error_args);
+
+    EDJournalPrivate *p = ed_journal_get_instance_private(self);
+    GError *tmp = NULL;
+
+    g_clear_object(&p->monitor);
+
+    p->monitor = g_file_monitor_directory(p->loc, 0, NULL, &tmp);
+    if (p->monitor == NULL) {
+        g_propagate_error(error, tmp);
+        return ed_error_internal;
+    }
+
+    g_signal_connect(
+        p->monitor, "changed", G_CALLBACK(ed_journal_changed), self);
+
+    return ed_error_success;
+}
+
+static void ed_journal_changed(GFileMonitor *mon, GFile *file, GFile *other,
+                               GFileMonitorEvent event,
+                               gpointer user)
+{
+    EDJournal *self = ED_JOURNAL(user);
+
+    if (event == G_FILE_MONITOR_EVENT_CHANGED) {
+        printf("file changed!\n");
+    }
+
+    (void)self;
+}
+
 gchar const *ed_journal_get_location(EDJournal *self)
 {
     return_if_true(self == NULL, NULL);
@@ -171,11 +247,30 @@ gchar const *ed_journal_get_location(EDJournal *self)
     return p->location;
 }
 
-EDErrorCode ed_journal_set_location(EDJournal *self, gchar const *dir)
+void ed_journal_close(EDJournal *self)
+{
+    return_if_true(self == NULL,);
+
+    EDJournalPrivate *p = ed_journal_get_instance_private(self);
+
+    g_free(p->location);
+    p->location = NULL;
+
+    g_clear_object(&p->loc);
+
+    g_clear_object(&p->monitor);
+
+    g_list_free_full(p->files, g_object_unref);
+    p->files = NULL;
+}
+
+EDErrorCode ed_journal_open(EDJournal *self, gchar const *dir, GError **error)
 {
     return_if_true(self == NULL || dir == NULL, ed_error_args);
 
     EDJournalPrivate *p = ed_journal_get_instance_private(self);
+    EDErrorCode ret = 0;
+    GError *tmp = NULL;
 
     if (!g_file_test(dir, G_FILE_TEST_IS_DIR)) {
         return ed_error_invalid;
@@ -184,8 +279,18 @@ EDErrorCode ed_journal_set_location(EDJournal *self, gchar const *dir)
     g_free(p->location);
     p->location = g_strdup(dir);
 
+    g_clear_object(&p->loc);
+    p->loc = g_file_new_for_path(dir);
+
     ed_journal_load_files(self);
 
+    ret = ed_journal_watch(self, &tmp);
+    if (ED_ERROR(ret)) {
+        g_propagate_error(error, tmp);
+        ed_journal_close(self);
+        return ed_error_internal;
+    }
+
     return ed_error_success;
 }
 

lib/tests/test-journal-file.c

@@ -16,7 +16,7 @@ static void test_new_filename(void **state)
 
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
     assert_int_equal(ret, ed_error_success);
     assert_null(error);
 
@@ -33,7 +33,7 @@ static void test_old_filename(void **state)
 
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
     assert_int_equal(ret, ed_error_success);
     assert_null(error);
 
@@ -50,7 +50,7 @@ static void test_new_datetime(void **state)
 
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
     assert_int_equal(ret, ed_error_success);
     assert_null(error);
 
@@ -79,7 +79,7 @@ static void test_old_datetime(void **state)
 
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
     assert_int_equal(ret, ed_error_success);
     assert_null(error);
 
@@ -109,7 +109,7 @@ static void test_valid_load(void **state)
     file = ed_journal_file_new();
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
 
     assert_null(error);
     assert_int_equal(ret, ed_error_success);
@@ -128,7 +128,7 @@ static void test_valid_peek(void **state)
     file = ed_journal_file_new();
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
 
     assert_null(error);
     assert_int_equal(ret, ed_error_success);
@@ -161,7 +161,7 @@ static void test_first_last(void **state)
     file = ed_journal_file_new();
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
 
     assert_null(error);
     assert_int_equal(ret, ed_error_success);
@@ -193,7 +193,7 @@ static void test_in_range(void **state)
     file = ed_journal_file_new();
     assert_non_null(file);
 
-    ret = ed_journal_file_open(file, filename, &error);
+    ret = ed_journal_file_peek(file, filename, &error);
 
     assert_null(error);
     assert_int_equal(ret, ed_error_success);

lib/tests/test-journal.c

@@ -14,7 +14,7 @@ static void test_userprofile_location(void **state)
 {
     setenv("USERPROFILE", "./", 1);
 
-    EDJournal *journal = ed_journal_new();
+    EDJournal *journal = ed_journal_new_with_location(NULL, NULL);
     assert_non_null(journal);
 
     gchar const *location = ed_journal_get_location(journal);
@@ -27,7 +27,7 @@ static void test_file_sorting(void **state)
 {
     setenv("USERPROFILE", "./", 1);
 
-    EDJournal *journal = ed_journal_new();
+    EDJournal *journal = ed_journal_new_with_location(NULL, NULL);
     assert_non_null(journal);
 
     gchar const *location = ed_journal_get_location(journal);