[tracker/wip/carlosg/resources-as-cursors: 6/12] libtracker-sparql: Integrate JSON-LD serializers and deserializers in API

[Carlos Garnacho <carlosg src gnome org>]

commit c1766fdfec1b5fb6659a5a6fff25a301278c575b
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Jul 11 20:31:09 2022 +0200

    libtracker-sparql: Integrate JSON-LD serializers and deserializers in API
    
    Add a new TRACKER_RDF_FORMAT_JSON_LD TrackerRdfFormat enum value, and use
    the serializer/deserializer objects for those, so that this new value is
    accepted in all API that takes this enum.

 src/libtracker-sparql/direct/tracker-direct-statement.c | 2 ++
 src/libtracker-sparql/direct/tracker-direct.c           | 2 ++
 src/libtracker-sparql/remote/tracker-http-module.c      | 1 +
 src/libtracker-sparql/tracker-deserializer.c            | 5 +++++
 src/libtracker-sparql/tracker-endpoint-http.c           | 1 +
 src/libtracker-sparql/tracker-enums-private.h           | 1 +
 src/libtracker-sparql/tracker-enums.h                   | 1 +
 src/libtracker-sparql/tracker-resource.c                | 2 ++
 src/libtracker-sparql/tracker-serializer.c              | 4 ++++
 9 files changed, 19 insertions(+)
---
diff --git a/src/libtracker-sparql/direct/tracker-direct-statement.c 
b/src/libtracker-sparql/direct/tracker-direct-statement.c
index 8ff95c8fb..d7d1be225 100644
--- a/src/libtracker-sparql/direct/tracker-direct-statement.c
+++ b/src/libtracker-sparql/direct/tracker-direct-statement.c
@@ -216,6 +216,8 @@ convert_format (TrackerRdfFormat format)
                return TRACKER_SERIALIZER_FORMAT_TTL;
        case TRACKER_RDF_FORMAT_TRIG:
                return TRACKER_SERIALIZER_FORMAT_TRIG;
+       case TRACKER_RDF_FORMAT_JSON_LD:
+               return TRACKER_SERIALIZER_FORMAT_JSON_LD;
        default:
                g_assert_not_reached ();
        }
diff --git a/src/libtracker-sparql/direct/tracker-direct.c b/src/libtracker-sparql/direct/tracker-direct.c
index 0cef224e0..3f9ab7fac 100644
--- a/src/libtracker-sparql/direct/tracker-direct.c
+++ b/src/libtracker-sparql/direct/tracker-direct.c
@@ -207,6 +207,8 @@ convert_format (TrackerRdfFormat format)
                return TRACKER_SERIALIZER_FORMAT_TTL;
        case TRACKER_RDF_FORMAT_TRIG:
                return TRACKER_SERIALIZER_FORMAT_TRIG;
+       case TRACKER_RDF_FORMAT_JSON_LD:
+               return TRACKER_SERIALIZER_FORMAT_JSON_LD;
        default:
                g_assert_not_reached ();
        }
diff --git a/src/libtracker-sparql/remote/tracker-http-module.c 
b/src/libtracker-sparql/remote/tracker-http-module.c
index 421005001..b9bc78f5c 100644
--- a/src/libtracker-sparql/remote/tracker-http-module.c
+++ b/src/libtracker-sparql/remote/tracker-http-module.c
@@ -40,6 +40,7 @@ static const gchar *mimetypes[] = {
        "application/sparql-results+xml",
        "text/turtle",
        "application/trig",
+       "application/ld+json",
 };
 
 G_STATIC_ASSERT (G_N_ELEMENTS (mimetypes) == TRACKER_N_SERIALIZER_FORMATS);
diff --git a/src/libtracker-sparql/tracker-deserializer.c b/src/libtracker-sparql/tracker-deserializer.c
index b1ea33331..0b0d4f8bf 100644
--- a/src/libtracker-sparql/tracker-deserializer.c
+++ b/src/libtracker-sparql/tracker-deserializer.c
@@ -24,6 +24,7 @@
 #include "tracker-deserializer.h"
 #include "tracker-deserializer-turtle.h"
 #include "tracker-deserializer-json.h"
+#include "tracker-deserializer-json-ld.h"
 #include "tracker-deserializer-xml.h"
 
 #include "tracker-private.h"
@@ -181,6 +182,8 @@ tracker_deserializer_new (GInputStream            *stream,
                return tracker_deserializer_turtle_new (stream, namespaces);
        case TRACKER_SERIALIZER_FORMAT_TRIG:
                return tracker_deserializer_trig_new (stream, namespaces);
+       case TRACKER_SERIALIZER_FORMAT_JSON_LD:
+               return tracker_deserializer_json_ld_new (stream, namespaces);
        default:
                g_warn_if_reached ();
                return NULL;
@@ -197,6 +200,8 @@ pick_format_for_file (GFile *file)
 
        if (g_str_has_suffix (uri, ".trig"))
                format = TRACKER_SERIALIZER_FORMAT_TRIG;
+       if (g_str_has_suffix (uri, ".jsonld"))
+               format = TRACKER_SERIALIZER_FORMAT_JSON_LD;
 
        g_free (uri);
 
diff --git a/src/libtracker-sparql/tracker-endpoint-http.c b/src/libtracker-sparql/tracker-endpoint-http.c
index 52a19458e..e38bb78bb 100644
--- a/src/libtracker-sparql/tracker-endpoint-http.c
+++ b/src/libtracker-sparql/tracker-endpoint-http.c
@@ -64,6 +64,7 @@ const gchar *supported_formats[] = {
        "http://www.w3.org/ns/formats/SPARQL_Results_XML";,
        "http://www.w3.org/ns/formats/Turtle";,
        "http://www.w3.org/ns/formats/TriG";,
+       "http://www.w3.org/ns/formats/JSON-LD";,
 };
 
 G_STATIC_ASSERT (G_N_ELEMENTS (supported_formats) == TRACKER_N_SERIALIZER_FORMATS);
diff --git a/src/libtracker-sparql/tracker-enums-private.h b/src/libtracker-sparql/tracker-enums-private.h
index e1b0792ae..fe38150f2 100644
--- a/src/libtracker-sparql/tracker-enums-private.h
+++ b/src/libtracker-sparql/tracker-enums-private.h
@@ -28,6 +28,7 @@ typedef enum
        TRACKER_SERIALIZER_FORMAT_XML, /* application/sparql-results+xml */
        TRACKER_SERIALIZER_FORMAT_TTL, /* text/turtle */
        TRACKER_SERIALIZER_FORMAT_TRIG, /* application/trig */
+       TRACKER_SERIALIZER_FORMAT_JSON_LD, /* application/ld+json */
        TRACKER_N_SERIALIZER_FORMATS
 } TrackerSerializerFormat;
 
diff --git a/src/libtracker-sparql/tracker-enums.h b/src/libtracker-sparql/tracker-enums.h
index bcbb11359..c89c65e9f 100644
--- a/src/libtracker-sparql/tracker-enums.h
+++ b/src/libtracker-sparql/tracker-enums.h
@@ -25,6 +25,7 @@
 typedef enum {
        TRACKER_RDF_FORMAT_TURTLE,
        TRACKER_RDF_FORMAT_TRIG,
+       TRACKER_RDF_FORMAT_JSON_LD,
        TRACKER_N_RDF_FORMATS
 } TrackerRdfFormat;
 
diff --git a/src/libtracker-sparql/tracker-resource.c b/src/libtracker-sparql/tracker-resource.c
index a59d98ebb..7231968d9 100644
--- a/src/libtracker-sparql/tracker-resource.c
+++ b/src/libtracker-sparql/tracker-resource.c
@@ -1668,6 +1668,8 @@ convert_format (TrackerRdfFormat format)
                return TRACKER_SERIALIZER_FORMAT_TTL;
        case TRACKER_RDF_FORMAT_TRIG:
                return TRACKER_SERIALIZER_FORMAT_TRIG;
+       case TRACKER_RDF_FORMAT_JSON_LD:
+               return TRACKER_SERIALIZER_FORMAT_JSON_LD;
        case TRACKER_N_RDF_FORMATS:
                g_assert_not_reached ();
        }
diff --git a/src/libtracker-sparql/tracker-serializer.c b/src/libtracker-sparql/tracker-serializer.c
index a95961d92..f6a72f9fd 100644
--- a/src/libtracker-sparql/tracker-serializer.c
+++ b/src/libtracker-sparql/tracker-serializer.c
@@ -23,6 +23,7 @@
 
 #include "tracker-serializer.h"
 #include "tracker-serializer-json.h"
+#include "tracker-serializer-json-ld.h"
 #include "tracker-serializer-trig.h"
 #include "tracker-serializer-turtle.h"
 #include "tracker-serializer-xml.h"
@@ -165,6 +166,9 @@ tracker_serializer_new (TrackerSparqlCursor     *cursor,
        case TRACKER_SERIALIZER_FORMAT_TRIG:
                type = TRACKER_TYPE_SERIALIZER_TRIG;
                break;
+       case TRACKER_SERIALIZER_FORMAT_JSON_LD:
+               type = TRACKER_TYPE_SERIALIZER_JSON_LD;
+               break;
        default:
                g_warn_if_reached ();
                return NULL;