327 lines
8.1 KiB
JavaScript
327 lines
8.1 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/multiwikiserver/sql-tiddler-store.js
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type: application/javascript
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module-type: library
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Functions to perform basic tiddler operations with a sqlite3 database
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\*/
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(function() {
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/*
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Create a tiddler store. Options include:
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databasePath - path to the database file (can be ":memory:" to get a temporary database)
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*/
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function SqlTiddlerStore(options) {
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options = options || {};
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var databasePath = options.databasePath || ":memory:";
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// Create our database
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this.db = new $tw.sqlite3.Database(databasePath,{verbose: undefined && console.log});
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}
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SqlTiddlerStore.prototype.close = function() {
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this.db.close();
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this.db = undefined;
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};
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SqlTiddlerStore.prototype.runStatement = function(sql,params) {
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params = params || {};
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const statement = this.db.prepare(sql);
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statement.run(params);
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};
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SqlTiddlerStore.prototype.runStatementGet = function(sql,params) {
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params = params || {};
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const statement = this.db.prepare(sql);
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return statement.get(params);
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};
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SqlTiddlerStore.prototype.runStatementGetAll = function(sql,params) {
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params = params || {};
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const statement = this.db.prepare(sql);
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return statement.all(params);
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};
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SqlTiddlerStore.prototype.runStatements = function(sqlArray) {
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for(const sql of sqlArray) {
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this.runStatement(sql);
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}
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};
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SqlTiddlerStore.prototype.createTables = function() {
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this.runStatements([`
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-- Bags have names and access control settings
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CREATE TABLE IF NOT EXISTS bags (
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bag_id INTEGER PRIMARY KEY,
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bag_name TEXT UNIQUE,
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accesscontrol TEXT
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)
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`,`
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-- Recipes have names...
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CREATE TABLE IF NOT EXISTS recipes (
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recipe_id INTEGER PRIMARY KEY,
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recipe_name TEXT UNIQUE
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)
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`,`
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-- ...and recipes also have an ordered list of bags
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CREATE TABLE IF NOT EXISTS recipe_bags (
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recipe_id INTEGER,
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bag_id INTEGER,
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position INTEGER,
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FOREIGN KEY (recipe_id) REFERENCES recipes(recipe_id) ON UPDATE CASCADE ON DELETE CASCADE,
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FOREIGN KEY (bag_id) REFERENCES bags(bag_id) ON UPDATE CASCADE ON DELETE CASCADE,
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UNIQUE (recipe_id, bag_id)
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)
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`,`
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-- Tiddlers are contained in bags and have titles
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CREATE TABLE IF NOT EXISTS tiddlers (
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tiddler_id INTEGER PRIMARY KEY,
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bag_id INTEGER,
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title TEXT,
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FOREIGN KEY (bag_id) REFERENCES bags(bag_id) ON UPDATE CASCADE ON DELETE CASCADE,
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UNIQUE (bag_id, title)
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)
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`,`
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-- Tiddlers also have unordered lists of fields, each of which has a name and associated value
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CREATE TABLE IF NOT EXISTS fields (
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tiddler_id INTEGER,
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field_name TEXT,
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field_value TEXT,
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FOREIGN KEY (tiddler_id) REFERENCES tiddlers(tiddler_id) ON UPDATE CASCADE ON DELETE CASCADE,
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UNIQUE (tiddler_id, field_name)
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)
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`]);
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};
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SqlTiddlerStore.prototype.logTables = function() {
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var self = this;
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function sqlLogTable(table) {
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console.log(`TABLE ${table}:`);
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let statement = self.db.prepare(`select * from ${table}`);
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for(const row of statement.all()) {
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console.log(row);
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}
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}
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const tables = ["recipes","bags","recipe_bags","tiddlers","fields"];
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for(const table of tables) {
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sqlLogTable(table);
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}
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};
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SqlTiddlerStore.prototype.createBag = function(bagname) {
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// Run the queries
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this.runStatement(`
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INSERT OR IGNORE INTO bags (bag_name, accesscontrol)
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VALUES ($bag_name, '')
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`,{
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bag_name: bagname
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});
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this.runStatement(`
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UPDATE bags
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SET accesscontrol = $accesscontrol
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WHERE bag_name = $bag_name
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`,{
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bag_name: bagname,
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accesscontrol: "[some access control stuff]"
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});
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};
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SqlTiddlerStore.prototype.createRecipe = function(recipename,bagnames) {
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// Run the queries
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this.runStatement(`
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-- Create the entry in the recipes table if required
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INSERT OR IGNORE INTO recipes (recipe_name)
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VALUES ($recipe_name)
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`,{
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recipe_name: recipename
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});
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this.runStatement(`
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-- Delete existing recipe_bags entries for this recipe
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DELETE FROM recipe_bags WHERE recipe_id = (SELECT recipe_id FROM recipes WHERE recipe_name = $recipe_name)
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`,{
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recipe_name: recipename
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});
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this.runStatement(`
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INSERT INTO recipe_bags (recipe_id, bag_id, position)
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SELECT r.recipe_id, b.bag_id, j.key as position
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FROM recipes r
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JOIN bags b
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LEFT JOIN json_each($bag_names) AS j ON j.value = b.bag_name
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WHERE r.recipe_name = $recipe_name
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`,{
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recipe_name: recipename,
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bag_names: JSON.stringify(bagnames)
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});
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};
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SqlTiddlerStore.prototype.saveTiddler = function(tiddlerFields,bagname) {
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// Update the tiddlers table
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this.runStatement(`
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INSERT OR REPLACE INTO tiddlers (bag_id, title)
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VALUES (
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(SELECT bag_id FROM bags WHERE bag_name = $bag_name),
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$title
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)
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`,{
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title: tiddlerFields.title,
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bag_name: bagname
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});
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// Update the fields table
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this.runStatement(`
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INSERT OR REPLACE INTO fields (tiddler_id, field_name, field_value)
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SELECT
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t.tiddler_id,
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json_each.key AS field_name,
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json_each.value AS field_value
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FROM (
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SELECT tiddler_id
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FROM tiddlers
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WHERE bag_id = (
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SELECT bag_id
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FROM bags
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WHERE bag_name = $bag_name
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) AND title = $title
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) AS t
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JOIN json_each($field_values) AS json_each
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`,{
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title: tiddlerFields.title,
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bag_name: bagname,
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field_values: JSON.stringify(Object.assign({},tiddlerFields,{title: undefined}))
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});
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};
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SqlTiddlerStore.prototype.saveRecipeTiddler = function(tiddlerFields,recipename) {
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// Find the topmost bag in the recipe
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var row = this.runStatementGet(`
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SELECT b.bag_name
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FROM bags AS b
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JOIN (
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SELECT rb.bag_id
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FROM recipe_bags AS rb
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WHERE rb.recipe_id = (
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SELECT recipe_id
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FROM recipes
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WHERE recipe_name = $recipe_name
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)
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ORDER BY rb.position DESC
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LIMIT 1
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) AS selected_bag
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ON b.bag_id = selected_bag.bag_id
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`,{
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recipe_name: recipename
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});
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// Save the tiddler to the topmost bag
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this.saveTiddler(tiddlerFields,row.bag_name);
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};
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SqlTiddlerStore.prototype.deleteTiddler = function(title,bagname) {
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// Run the queries
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this.runStatement(`
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DELETE FROM fields
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WHERE tiddler_id IN (
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SELECT t.tiddler_id
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FROM tiddlers AS t
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INNER JOIN bags AS b ON t.bag_id = b.bag_id
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WHERE b.bag_name = $bag_name AND t.title = $title
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)
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`,{
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title: title,
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bag_name: bagname
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});
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this.runStatement(`
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DELETE FROM tiddlers
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WHERE bag_id = (
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SELECT bag_id
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FROM bags
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WHERE bag_name = $bag_name
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) AND title = $title
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`,{
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title: title,
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bag_name: bagname
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});
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};
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SqlTiddlerStore.prototype.getTiddler = function(title,recipename) {
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const rows = this.runStatementGetAll(`
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SELECT field_name, field_value
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FROM fields
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WHERE tiddler_id = (
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SELECT tt.tiddler_id
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FROM (
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SELECT bb.bag_id, t.tiddler_id
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FROM (
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SELECT b.bag_id
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FROM bags AS b
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INNER JOIN recipe_bags AS rb ON b.bag_id = rb.bag_id
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INNER JOIN recipes AS r ON rb.recipe_id = r.recipe_id
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WHERE r.recipe_name = $recipe_name
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ORDER BY rb.position
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) AS bb
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INNER JOIN tiddlers AS t ON bb.bag_id = t.bag_id
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WHERE t.title = $title
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) AS tt
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ORDER BY tt.tiddler_id DESC
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LIMIT 1
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)
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`,{
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title: title,
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recipe_name: recipename
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});
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if(rows.length === 0) {
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return null;
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} else {
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return rows.reduce((accumulator,value) => {
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accumulator[value["field_name"]] = value.field_value;
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return accumulator;
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},{title: title});
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}
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};
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/*
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Get the titles of the tiddlers in a recipe. Returns an empty array for recipes that do not exist
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*/
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SqlTiddlerStore.prototype.getRecipeTiddlers = function(recipename) {
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const rows = this.runStatementGetAll(`
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SELECT DISTINCT title
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FROM tiddlers
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WHERE bag_id IN (
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SELECT bag_id
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FROM recipe_bags
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WHERE recipe_id = (
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SELECT recipe_id
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FROM recipes
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WHERE recipe_name = $recipe_name
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)
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)
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ORDER BY title ASC
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`,{
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recipe_name: recipename
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});
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return rows.map(value => value.title);
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};
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/*
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Get the names of the bags in a recipe. Returns an empty array for recipes that do not exist
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*/
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SqlTiddlerStore.prototype.getRecipeBags = function(recipename) {
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const rows = this.runStatementGetAll(`
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SELECT bags.bag_name
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FROM bags
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JOIN (
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SELECT rb.bag_id
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FROM recipe_bags AS rb
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JOIN recipes AS r ON rb.recipe_id = r.recipe_id
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WHERE r.recipe_name = $recipe_name
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ORDER BY rb.position
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) AS bag_priority ON bags.bag_id = bag_priority.bag_id
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`,{
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recipe_name: recipename
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});
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return rows.map(value => value.bag_name);
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};
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exports.SqlTiddlerStore = SqlTiddlerStore;
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})(); |