[tracker-miners/wip/carlosg/miner-changes: 6/19] libtracker-extract: Add API to obtain hash for an extractor module

[Carlos Garnacho <carlosg src gnome org>]

commit bc6aaeb01cce21b11a8b44ea6270da8e85c757d0
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Jun 13 12:22:09 2020 +0200

    libtracker-extract: Add API to obtain hash for an extractor module
    
    We'll be rubberstamping extracted files with these.

 src/libtracker-extract/tracker-module-manager.c | 23 +++++++++++++++++++++++
 src/libtracker-extract/tracker-module-manager.h |  1 +
 2 files changed, 24 insertions(+)
---
diff --git a/src/libtracker-extract/tracker-module-manager.c b/src/libtracker-extract/tracker-module-manager.c
index 96c0e5f05..6df2f6f65 100644
--- a/src/libtracker-extract/tracker-module-manager.c
+++ b/src/libtracker-extract/tracker-module-manager.c
@@ -36,6 +36,7 @@ typedef struct {
        GList *block_patterns;
        GStrv fallback_rdf_types;
        gchar *graph;
+       gchar *hash;
 } RuleInfo;
 
 typedef struct {
@@ -124,6 +125,7 @@ load_extractor_rule (GKeyFile    *key_file,
 
        rule.fallback_rdf_types = g_key_file_get_string_list (key_file, "ExtractorRule", "FallbackRdfTypes", 
NULL, NULL);
        rule.graph = g_key_file_get_string (key_file, "ExtractorRule", "Graph", NULL);
+       rule.hash = g_key_file_get_string (key_file, "ExtractorRule", "Hash", NULL);
 
        /* Construct the rule */
        rule.module_path = g_intern_string (module_path);
@@ -572,3 +574,24 @@ tracker_extract_module_manager_get_graph (const gchar *mimetype)
 
        return NULL;
 }
+
+const gchar *
+tracker_extract_module_manager_get_hash (const gchar *mimetype)
+{
+       GList *l, *list;
+
+       if (!tracker_extract_module_manager_init ()) {
+               return NULL;
+       }
+
+       list = lookup_rules (mimetype);
+
+       for (l = list; l; l = l->next) {
+               RuleInfo *r_info = l->data;
+
+               if (r_info->graph)
+                       return r_info->hash;
+       }
+
+       return NULL;
+}
diff --git a/src/libtracker-extract/tracker-module-manager.h b/src/libtracker-extract/tracker-module-manager.h
index 95954232a..b566b1113 100644
--- a/src/libtracker-extract/tracker-module-manager.h
+++ b/src/libtracker-extract/tracker-module-manager.h
@@ -46,6 +46,7 @@ GStrv tracker_extract_module_manager_get_all_rdf_types (void);
 
 GStrv     tracker_extract_module_manager_get_rdf_types (const gchar *mimetype);
 const gchar * tracker_extract_module_manager_get_graph (const gchar *mimetype);
+const gchar * tracker_extract_module_manager_get_hash  (const gchar *mimetype);
 
 GModule * tracker_extract_module_manager_get_module (const gchar                 *mimetype,
                                                      const gchar                **rule_out,