PRAGMA foreign_keys==off;

----

-- Table structure plugins

----

CREATE TABLE 'plugins' (

    'id'      INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,

    'libelle' TEXT NOT NULL

);

INSERT INTO 'plugins' VALUES (0, 'List');

INSERT INTO 'plugins' VALUES (1, 'Hierarchy');

----

-- Table structure for items

----

CREATE TABLE 'items' (

    'id'      INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,

    'plugin'  INTEGER DEFAULT 1,

    'code'    TEXT NOT NULL,

    'libelle' TEXT NOT NULL,

    CONSTRAINT fk_items

      FOREIGN KEY('plugin') REFERENCES 'plugins'('id')

      ON DELETE CASCADE

);

----

-- Table structure for links

----

CREATE TABLE 'links' (

    'id'    INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,

    'link'  INTEGER DEFAULT 0,

    'item' INTEGER,

    CONSTRAINT fk_links

      FOREIGN KEY('item') REFERENCES 'items'('id')

      ON DELETE CASCADE

);

----

-- Table structure for nodes

----

CREATE TABLE 'nodes' (

    'child'   INTEGER, 

    'parent' INTEGER, 

    'rank'   INTEGER DEFAULT 0,

    CONSTRAINT fk_nodes_1

      FOREIGN KEY('child') REFERENCES 'links'('id')

      ON DELETE CASCADE,

    CONSTRAINT fk_nodes_2

      FOREIGN KEY('parent') REFERENCES 'links'('id')

      ON DELETE CASCADE

);

----

-- View structure for v_items

----

CREATE VIEW v_items AS 

SELECT 

    items.plugin, items.code, items.libelle ,

    links.*

FROM links 

INNER JOIN items ON items.id = links.item;

----

-- View structure for v_items_tree

----

CREATE VIEW v_items_tree AS

SELECT

    nodes.parent, nodes.rank,

    v_items.*

FROM v_items

LEFT JOIN nodes ON nodes.child = v_items.id;

PRAGMA foreign_keys=on;