From 1e2b55c2c2e79a41dd0056fda7966dabc329fc0d Mon Sep 17 00:00:00 2001
From: Olaf Wintermann <olaf.wintermann@gmail.com>
Date: Sat, 8 Jan 2022 17:54:05 +0100
Subject: [PATCH] add functions for easier json object/array access

---
 application/Makefile |  1 +
 application/json.c   | 43 ++++++++++++++++++++++
 application/json.h   |  5 +++
 application/player.c | 85 ++++++++++++++++++++++++++++++++++++++++++--
 application/player.h |  2 +-
 5 files changed, 132 insertions(+), 4 deletions(-)

diff --git a/application/Makefile b/application/Makefile
index 8424552..ea21439 100644
--- a/application/Makefile
+++ b/application/Makefile
@@ -37,6 +37,7 @@ SRC += window.c
 SRC += player.c
 SRC += settings.c
 SRC += utils.c
+SRC += json.c
 
 OBJ = $(SRC:%.c=$(BUILD_ROOT)/build/application/%.$(OBJ_EXT))
 
diff --git a/application/json.c b/application/json.c
index 6b126d4..4dd672c 100644
--- a/application/json.c
+++ b/application/json.c
@@ -842,3 +842,46 @@ int json_read_value(JSONParser *p, JSONValue **value) {
     return 1;
 }
 
+JSONValue* json_obj_get(JSONObject *obj, const char *name) {
+    for(size_t i=0;i<obj->size;i++) {
+        if(!strcmp(obj->values[i].name, name)) {
+            return obj->values[i].value;
+        }
+    }
+    return NULL;
+}
+
+JSONValue* json_array_get(JSONArray *array, size_t i) {
+    if(i >= array->size) return NULL;
+    return array->array[i];
+}
+
+void json_value_free(JSONValue *value) {
+    switch(value->type) {
+        case JSON_OBJECT: {
+            JSONObject obj = value->value.object;
+            for(size_t i=0;i<obj.size;i++) {
+                json_value_free(obj.values[i].value);
+                free(obj.values[i].name);
+            }
+            free(obj.values);
+            break;
+        }
+        case JSON_ARRAY: {
+            JSONArray array = value->value.array;
+            for(size_t i=0;i<array.size;i++) {
+                json_value_free(array.array[i]);
+            }
+            free(array.array);
+            break;
+        }
+        case JSON_STRING: {
+            free(value->value.string.string);
+            break;
+        }
+        default: {
+            break;
+        }
+    }
+    free(value);
+}
diff --git a/application/json.h b/application/json.h
index 88494bf..659c7f6 100644
--- a/application/json.h
+++ b/application/json.h
@@ -200,6 +200,11 @@ int json_reader_bool(JSONParser *p);
 
 int json_read_value(JSONParser *p, JSONValue **value);
 
+JSONValue* json_obj_get(JSONObject *obj, const char *name);
+
+JSONValue* json_array_get(JSONArray *array, size_t i);
+
+void json_value_free(JSONValue *value);
 
 #ifdef __cplusplus
 }
diff --git a/application/player.c b/application/player.c
index d553b81..38b3a0c 100644
--- a/application/player.c
+++ b/application/player.c
@@ -37,7 +37,7 @@
 #include <sys/un.h>
 #include <pthread.h>
 
-
+#include "json.h"
 
 extern char **environ;
 
@@ -47,6 +47,8 @@ extern char **environ;
 #define PLAYER_POLL_TIMEOUT 500
 #define PLAYER_IN_BUFSIZE   8192
 
+static void json_print(JSONValue *value, char *name, int indent);
+
 static void* start_player(void *data);
 
 static void player_io(Player *p);
@@ -254,6 +256,8 @@ static void player_io(Player *p) {
     fds[1].events = POLLIN;
     fds[1].revents = 0;
     
+    JSONParser *js = json_parser_new();
+    
     char buf[PLAYER_IN_BUFSIZE];
     while(poll(fds, 2, PLAYER_POLL_TIMEOUT)) {
         if(fds[0].revents == POLLIN) {
@@ -266,12 +270,22 @@ static void player_io(Player *p) {
             if((r = read(fds[1].fd, buf, PLAYER_IN_BUFSIZE)) <= 0) {
                 break;
             }
+            json_parser_fill(js, buf, r);
             
-            write(1, buf, r);
+            JSONValue *value;
+            int ret;
+            while((ret = json_read_value(js, &value)) == 1) {
+                json_print(value, NULL, 0);
+                json_value_free(value);
+            }
             
+            if(ret == -1) {
+                fprintf(stderr, "JSON-RPC error\n");
+                break;
+            }
         }
         
-        char *cmd = "{ \"command\": [\"get_property\", \"playback-time\"] }\n";
+        char *cmd = "{ \"command\": [\"get_property\", \"playback-time\"], request_id=\"" REQ_ID_PLAYBACK_TIME "\" }\n";
         write(p->ipc, cmd, strlen(cmd));
     }
 }
@@ -295,3 +309,68 @@ void PlayerDestroy(Player *p) {
     free(p);
 }
 
+
+static void json_print(JSONValue *value, char *name, int indent) {
+    if(name) {
+        printf("%*s%s: ", indent*4, "", name);
+    } else {
+        printf("%*s", indent*4, "");
+    }
+    
+    
+    switch(value->type) {
+        case JSON_OBJECT: {
+            printf("{\n");
+            
+            for(int i=0;i<value->value.object.size;i++) {
+                JSONObjValue val = value->value.object.values[i];
+                json_print(val.value, val.name, indent+1);
+                if(i+1 < value->value.object.size) {
+                    printf(",\n");
+                } else {
+                    printf("\n");
+                }
+            }
+            
+            printf("%*s}", indent*4, "");
+            break;
+        }
+        case JSON_ARRAY: {
+            printf("[\n");
+            
+            for(int i=0;i<value->value.object.size;i++) {
+                JSONValue *v = value->value.array.array[i];
+                json_print(v, NULL, indent+1);
+                if(i+1 < value->value.array.size) {
+                    printf(",\n");
+                } else {
+                    printf("\n");
+                }
+            }
+            
+            printf("%*s]", indent*4, "");
+            break;
+        }
+        case JSON_STRING: {
+            printf("\"%s\"", value->value.string.string);
+            break;
+        }
+        case JSON_INTEGER: {
+            printf("%i", (int)value->value.integer.value);
+            break;
+        }
+        case JSON_NUMBER: {
+            printf("%f", value->value.number.value);
+            break;
+        }
+        case JSON_LITERAL: {
+            printf("%s\n", "literal\n");
+            break;
+        }
+    }
+    
+    if(indent == 0) {
+        putchar('\n');
+    }
+}
+
diff --git a/application/player.h b/application/player.h
index 8d50a72..dc60827 100644
--- a/application/player.h
+++ b/application/player.h
@@ -30,7 +30,7 @@
 extern "C" {
 #endif
 
-#define REQ_ID_PLAYBACK_TIME 1
+#define REQ_ID_PLAYBACK_TIME "11"
     
 void PlayerOpenFile(MainWindow *win);
 
-- 
2.43.5