MT#56693 voip_sound_sets.parent_id and v_sound_set_files view

* add provisioning.voip_sound_sets parent field, that is null by default
  and can be set to another sound_set id to indicate it as own parent.
* add provisioning.voip_sound_files use_parent field, boolean not null
  default 0. this field defines wether parent sound sets should be
  used for this sound (default yes).
* add v_sound_set_files view that returns an accumulated
  representation of sound files available for sets for all the
  available sound handles.
  Therefore  "select * from v_sound_set_files where set_id = 3"
  returns all available sound handles and the filename and data columns
  containing the according content either from the current sound set
  or from first parent that contains a non empty filename and data,
  or until the sound set (current or parent) with the use_parent field = 0.
* parent_chain virtual column contains a ':' separated chain of parents
  used for the sound set.
* data_set_id virtual column contains the sound_set that was used for
  the sound data or null if there is no sound data.
* voip_sound_files update index from handle_id_ref (handle_id) to
  handle_set_id_idx (handle_id, set_id) for optimised behaviour
  of the v_sound_set_files view.
* add provisioning.voip_sound_sets expose_to_customer field that
  enables the sets to be used by customers.
* update provisioning.voip_preferences 'sound_set' attibute with
  expose_to_customer = 1

Change-Id: I06fb384d911cfe1d2ffe7be8fd2ba8d80468662f

db_scripts/diff/15757.down

@@ -0,0 +1,18 @@
+USE provisioning;
+SET autocommit=0;
+
+UPDATE voip_preferences SET expose_to_customer = 0 where attribute = 'sound_set';
+
+DROP VIEW v_sound_set_files;
+
+ALTER TABLE voip_sound_files
+    DROP COLUMN use_parent,
+    DROP KEY handle_set_id_idx (handle_id, set_id),
+    ADD KEY handle_id_ref;
+
+ALTER TABLE voip_sound_sets
+    DROP FOREIGN KEY vss_parent_id_ref,
+    DROP COLUMN parent_id,
+    DROP COLUMN expose_to_customer;
+
+COMMIT;

db_scripts/diff/15757.up

@@ -0,0 +1,57 @@
+USE provisioning;
+SET autocommit=0;
+
+ALTER TABLE voip_sound_sets
+    ADD COLUMN parent_id int(11) DEFAULT NULL,
+    ADD KEY parent_id_idx (parent_id),
+    ADD CONSTRAINT vss_parent_id_ref
+        FOREIGN KEY (parent_id)
+        REFERENCES voip_sound_sets (id)
+        ON UPDATE SET NULL ON DELETE SET NULL,
+    ADD COLUMN expose_to_customer boolean NOT NULL DEFAULT 0,
+    ADD KEY expose_to_customer_idx (expose_to_customer);
+
+ALTER TABLE voip_sound_files
+    ADD COLUMN use_parent boolean NOT NULL DEFAULT 0,
+    DROP KEY handle_id_ref,
+    ADD KEY handle_set_id_idx (handle_id, set_id);
+
+CREATE OR REPLACE VIEW v_sound_set_files AS
+WITH RECURSIVE cte as (
+    SELECT v.id AS set_id, v.reseller_id, v.contract_id, v.name, v.description,
+           v.handle_id, v.handle_name,
+           v.id AS data_set_id,
+           JSON_ARRAY(v.id) AS parent_chain
+      FROM (SELECT s.*, h.id as handle_id, h.name as handle_name
+            FROM voip_sound_sets s, voip_sound_handles h
+           ) AS v
+      LEFT JOIN voip_sound_files f ON f.handle_id = v.handle_id AND f.set_id = v.id
+     WHERE v.parent_id IS NULL
+    UNION all
+    SELECT v.id AS set_id, v.reseller_id, v.contract_id, v.name, v.description,
+           v.handle_id, v.handle_name,
+           IF(v.use_parent = 0, v.id, cte.data_set_id) AS data_set_id,
+           JSON_ARRAY_INSERT(cte.parent_chain, '$[0]', v.id) AS parent_chain
+      FROM (SELECT t.*, f.filename, f.use_parent
+            FROM (SELECT s.*, h.id as handle_id, h.name as handle_name
+                  FROM voip_sound_sets s, voip_sound_handles h
+                 ) AS t
+            LEFT JOIN voip_sound_files f ON f.handle_id = t.handle_id AND f.set_id = t.id
+           ) AS v
+      JOIN cte ON cte.set_id = v.parent_id AND cte.handle_id = v.handle_id
+)
+SELECT cte.set_id, cte.reseller_id, cte.contract_id, cte.name, cte.description,
+       cte.handle_id, cte.handle_name,
+       vsf.id as file_id, vsf.filename, vsf.loopplay,
+       REPLACE(REPLACE(REPLACE(
+          JSON_REMOVE(cte.parent_chain, '$[0]'),
+          '[', ''), ']', ''), ', ', ':'
+       ) AS parent_chain,
+       data_set_id,
+       vsf.data
+  FROM cte
+  LEFT JOIN voip_sound_files vsf ON vsf.set_id = cte.data_set_id AND vsf.handle_id = cte.handle_id;
+
+COMMIT;
+
+UPDATE voip_preferences SET expose_to_customer = 1 where attribute = 'sound_set';