523 lines
14 KiB
JavaScript
523 lines
14 KiB
JavaScript
/*\
|
|
title: $:/plugins/tiddlywiki/multiwikiserver/sql-tiddler-database.js
|
|
type: application/javascript
|
|
module-type: library
|
|
|
|
Low level SQL functions to store and retrieve tiddlers in a SQLite database.
|
|
|
|
This class is intended to encapsulate all the SQL queries used to access the database.
|
|
Validation is for the most part left to the caller
|
|
|
|
\*/
|
|
|
|
(function() {
|
|
|
|
/*
|
|
Create a tiddler store. Options include:
|
|
|
|
databasePath - path to the database file (can be ":memory:" to get a temporary database)
|
|
engine - wasm | better
|
|
*/
|
|
function SqlTiddlerDatabase(options) {
|
|
options = options || {};
|
|
// Initialise the statement cache
|
|
this.statements = Object.create(null); // Hashmap by SQL text of statement objects
|
|
// Create the database file directories if needed
|
|
if(options.databasePath) {
|
|
$tw.utils.createFileDirectories(options.databasePath);
|
|
}
|
|
// Choose engine
|
|
this.engine = options.engine || "better"; // wasm | better
|
|
// Create the database
|
|
const databasePath = options.databasePath || ":memory:";
|
|
let Database;
|
|
console.log(`Creating SQL engine ${this.engine}`)
|
|
switch(this.engine) {
|
|
case "wasm":
|
|
({ Database } = require("node-sqlite3-wasm"));
|
|
break;
|
|
case "better":
|
|
Database = require("better-sqlite3");
|
|
break;
|
|
}
|
|
this.db = new Database(databasePath,{
|
|
verbose: undefined && console.log
|
|
});
|
|
this.transactionDepth = 0;
|
|
}
|
|
|
|
SqlTiddlerDatabase.prototype.close = function() {
|
|
for(const sql in this.statements) {
|
|
this.statements[sql].finalize();
|
|
}
|
|
this.statements = Object.create(null);
|
|
this.db.close();
|
|
this.db = undefined;
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.normaliseParams = function(params) {
|
|
params = params || {};
|
|
const result = Object.create(null);
|
|
for(const paramName in params) {
|
|
if(this.engine !== "wasm" && paramName.startsWith("$")) {
|
|
result[paramName.slice(1)] = params[paramName];
|
|
} else {
|
|
result[paramName] = params[paramName];
|
|
}
|
|
}
|
|
return result;
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.prepareStatement = function(sql) {
|
|
if(!(sql in this.statements)) {
|
|
this.statements[sql] = this.db.prepare(sql);
|
|
}
|
|
return this.statements[sql];
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.runStatement = function(sql,params) {
|
|
params = this.normaliseParams(params);
|
|
const statement = this.prepareStatement(sql);
|
|
return statement.run(params);
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.runStatementGet = function(sql,params) {
|
|
params = this.normaliseParams(params);
|
|
const statement = this.prepareStatement(sql);
|
|
return statement.get(params);
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.runStatementGetAll = function(sql,params) {
|
|
params = this.normaliseParams(params);
|
|
const statement = this.prepareStatement(sql);
|
|
return statement.all(params);
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.runStatements = function(sqlArray) {
|
|
for(const sql of sqlArray) {
|
|
this.runStatement(sql);
|
|
}
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.createTables = function() {
|
|
this.runStatements([`
|
|
-- Bags have names and access control settings
|
|
CREATE TABLE IF NOT EXISTS bags (
|
|
bag_id INTEGER PRIMARY KEY AUTOINCREMENT,
|
|
bag_name TEXT UNIQUE NOT NULL,
|
|
accesscontrol TEXT NOT NULL,
|
|
description TEXT NOT NULL
|
|
)
|
|
`,`
|
|
-- Recipes have names...
|
|
CREATE TABLE IF NOT EXISTS recipes (
|
|
recipe_id INTEGER PRIMARY KEY AUTOINCREMENT,
|
|
recipe_name TEXT UNIQUE NOT NULL,
|
|
description TEXT NOT NULL
|
|
)
|
|
`,`
|
|
-- ...and recipes also have an ordered list of bags
|
|
CREATE TABLE IF NOT EXISTS recipe_bags (
|
|
recipe_id INTEGER NOT NULL,
|
|
bag_id INTEGER NOT NULL,
|
|
position INTEGER NOT NULL,
|
|
FOREIGN KEY (recipe_id) REFERENCES recipes(recipe_id) ON UPDATE CASCADE ON DELETE CASCADE,
|
|
FOREIGN KEY (bag_id) REFERENCES bags(bag_id) ON UPDATE CASCADE ON DELETE CASCADE,
|
|
UNIQUE (recipe_id, bag_id)
|
|
)
|
|
`,`
|
|
-- Tiddlers are contained in bags and have titles
|
|
CREATE TABLE IF NOT EXISTS tiddlers (
|
|
tiddler_id INTEGER PRIMARY KEY AUTOINCREMENT,
|
|
bag_id INTEGER NOT NULL,
|
|
title TEXT NOT NULL,
|
|
FOREIGN KEY (bag_id) REFERENCES bags(bag_id) ON UPDATE CASCADE ON DELETE CASCADE,
|
|
UNIQUE (bag_id, title)
|
|
)
|
|
`,`
|
|
-- Tiddlers also have unordered lists of fields, each of which has a name and associated value
|
|
CREATE TABLE IF NOT EXISTS fields (
|
|
tiddler_id INTEGER,
|
|
field_name TEXT NOT NULL,
|
|
field_value TEXT NOT NULL,
|
|
FOREIGN KEY (tiddler_id) REFERENCES tiddlers(tiddler_id) ON UPDATE CASCADE ON DELETE CASCADE,
|
|
UNIQUE (tiddler_id, field_name)
|
|
)
|
|
`]);
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.logTables = function() {
|
|
var self = this;
|
|
function sqlLogTable(table) {
|
|
console.log(`TABLE ${table}:`);
|
|
let statement = self.db.prepare(`select * from ${table}`);
|
|
for(const row of statement.all()) {
|
|
console.log(row);
|
|
}
|
|
}
|
|
const tables = ["recipes","bags","recipe_bags","tiddlers","fields"];
|
|
for(const table of tables) {
|
|
sqlLogTable(table);
|
|
}
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.listBags = function() {
|
|
const rows = this.runStatementGetAll(`
|
|
SELECT bag_name, accesscontrol, description
|
|
FROM bags
|
|
ORDER BY bag_name
|
|
`);
|
|
return rows;
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.createBag = function(bagname,description) {
|
|
// Run the queries
|
|
this.runStatement(`
|
|
INSERT OR IGNORE INTO bags (bag_name, accesscontrol, description)
|
|
VALUES ($bag_name, '', '')
|
|
`,{
|
|
$bag_name: bagname
|
|
});
|
|
this.runStatement(`
|
|
UPDATE bags
|
|
SET accesscontrol = $accesscontrol,
|
|
description = $description
|
|
WHERE bag_name = $bag_name
|
|
`,{
|
|
$bag_name: bagname,
|
|
$accesscontrol: "[some access control stuff]",
|
|
$description: description
|
|
});
|
|
};
|
|
|
|
/*
|
|
Returns array of {recipe_name:,description:,bag_names: []}
|
|
*/
|
|
SqlTiddlerDatabase.prototype.listRecipes = function() {
|
|
const rows = this.runStatementGetAll(`
|
|
SELECT r.recipe_name, r.description, b.bag_name, rb.position
|
|
FROM recipes AS r
|
|
JOIN recipe_bags AS rb ON rb.recipe_id = r.recipe_id
|
|
JOIN bags AS b ON rb.bag_id = b.bag_id
|
|
ORDER BY r.recipe_name, rb.position
|
|
`);
|
|
const results = [];
|
|
let currentRecipeName = null, currentRecipeIndex = -1;
|
|
for(const row of rows) {
|
|
if(row.recipe_name !== currentRecipeName) {
|
|
currentRecipeName = row.recipe_name;
|
|
currentRecipeIndex += 1;
|
|
results.push({
|
|
recipe_name: row.recipe_name,
|
|
description: row.description,
|
|
bag_names: []
|
|
});
|
|
}
|
|
results[currentRecipeIndex].bag_names.push(row.bag_name);
|
|
}
|
|
return results;
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.createRecipe = function(recipename,bagnames,description) {
|
|
// Run the queries
|
|
this.runStatement(`
|
|
-- Delete existing recipe_bags entries for this recipe
|
|
DELETE FROM recipe_bags WHERE recipe_id = (SELECT recipe_id FROM recipes WHERE recipe_name = $recipe_name)
|
|
`,{
|
|
$recipe_name: recipename
|
|
});
|
|
this.runStatement(`
|
|
-- Create the entry in the recipes table if required
|
|
INSERT OR REPLACE INTO recipes (recipe_name, description)
|
|
VALUES ($recipe_name, $description)
|
|
`,{
|
|
$recipe_name: recipename,
|
|
$description: description
|
|
});
|
|
this.runStatement(`
|
|
INSERT INTO recipe_bags (recipe_id, bag_id, position)
|
|
SELECT r.recipe_id, b.bag_id, j.key as position
|
|
FROM recipes r
|
|
JOIN bags b
|
|
INNER JOIN json_each($bag_names) AS j ON j.value = b.bag_name
|
|
WHERE r.recipe_name = $recipe_name
|
|
`,{
|
|
$recipe_name: recipename,
|
|
$bag_names: JSON.stringify(bagnames)
|
|
});
|
|
};
|
|
|
|
/*
|
|
Returns {tiddler_id:}
|
|
*/
|
|
SqlTiddlerDatabase.prototype.saveBagTiddler = function(tiddlerFields,bagname) {
|
|
// Update the tiddlers table
|
|
var info = this.runStatement(`
|
|
INSERT OR REPLACE INTO tiddlers (bag_id, title)
|
|
VALUES (
|
|
(SELECT bag_id FROM bags WHERE bag_name = $bag_name),
|
|
$title
|
|
)
|
|
`,{
|
|
$title: tiddlerFields.title,
|
|
$bag_name: bagname
|
|
});
|
|
// Update the fields table
|
|
this.runStatement(`
|
|
INSERT OR REPLACE INTO fields (tiddler_id, field_name, field_value)
|
|
SELECT
|
|
t.tiddler_id,
|
|
json_each.key AS field_name,
|
|
json_each.value AS field_value
|
|
FROM (
|
|
SELECT tiddler_id
|
|
FROM tiddlers
|
|
WHERE bag_id = (
|
|
SELECT bag_id
|
|
FROM bags
|
|
WHERE bag_name = $bag_name
|
|
) AND title = $title
|
|
) AS t
|
|
JOIN json_each($field_values) AS json_each
|
|
`,{
|
|
$title: tiddlerFields.title,
|
|
$bag_name: bagname,
|
|
$field_values: JSON.stringify(Object.assign({},tiddlerFields,{title: undefined}))
|
|
});
|
|
return {
|
|
tiddler_id: info.lastInsertRowid
|
|
}
|
|
};
|
|
|
|
/*
|
|
Returns {tiddler_id:,bag_name:} or null if the recipe is empty
|
|
*/
|
|
SqlTiddlerDatabase.prototype.saveRecipeTiddler = function(tiddlerFields,recipename) {
|
|
// Find the topmost bag in the recipe
|
|
var row = this.runStatementGet(`
|
|
SELECT b.bag_name
|
|
FROM bags AS b
|
|
JOIN (
|
|
SELECT rb.bag_id
|
|
FROM recipe_bags AS rb
|
|
WHERE rb.recipe_id = (
|
|
SELECT recipe_id
|
|
FROM recipes
|
|
WHERE recipe_name = $recipe_name
|
|
)
|
|
ORDER BY rb.position DESC
|
|
LIMIT 1
|
|
) AS selected_bag
|
|
ON b.bag_id = selected_bag.bag_id
|
|
`,{
|
|
$recipe_name: recipename
|
|
});
|
|
if(!row) {
|
|
return null;
|
|
}
|
|
// Save the tiddler to the topmost bag
|
|
var info = this.saveBagTiddler(tiddlerFields,row.bag_name);
|
|
return {
|
|
tiddler_id: info.tiddler_id,
|
|
bag_name: row.bag_name
|
|
};
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.deleteTiddler = function(title,bagname) {
|
|
// Run the queries
|
|
this.runStatement(`
|
|
DELETE FROM fields
|
|
WHERE tiddler_id IN (
|
|
SELECT t.tiddler_id
|
|
FROM tiddlers AS t
|
|
INNER JOIN bags AS b ON t.bag_id = b.bag_id
|
|
WHERE b.bag_name = $bag_name AND t.title = $title
|
|
)
|
|
`,{
|
|
$title: title,
|
|
$bag_name: bagname
|
|
});
|
|
this.runStatement(`
|
|
DELETE FROM tiddlers
|
|
WHERE bag_id = (
|
|
SELECT bag_id
|
|
FROM bags
|
|
WHERE bag_name = $bag_name
|
|
) AND title = $title
|
|
`,{
|
|
$title: title,
|
|
$bag_name: bagname
|
|
});
|
|
};
|
|
|
|
/*
|
|
returns {tiddler_id:,tiddler:}
|
|
*/
|
|
SqlTiddlerDatabase.prototype.getBagTiddler = function(title,bagname) {
|
|
const rows = this.runStatementGetAll(`
|
|
SELECT field_name, field_value, tiddler_id
|
|
FROM fields
|
|
WHERE tiddler_id = (
|
|
SELECT t.tiddler_id
|
|
FROM bags AS b
|
|
INNER JOIN tiddlers AS t ON b.bag_id = t.bag_id
|
|
WHERE t.title = $title AND b.bag_name = $bag_name
|
|
)
|
|
`,{
|
|
$title: title,
|
|
$bag_name: bagname
|
|
});
|
|
if(rows.length === 0) {
|
|
return null;
|
|
} else {
|
|
return {
|
|
tiddler_id: rows[0].tiddler_id,
|
|
tiddler: rows.reduce((accumulator,value) => {
|
|
accumulator[value["field_name"]] = value.field_value;
|
|
return accumulator;
|
|
},{title: title})
|
|
};
|
|
}
|
|
};
|
|
|
|
/*
|
|
Returns {bag_name:, tiddler: {fields}, tiddler_id:}
|
|
*/
|
|
SqlTiddlerDatabase.prototype.getRecipeTiddler = function(title,recipename) {
|
|
const rowTiddlerId = this.runStatementGet(`
|
|
SELECT t.tiddler_id, b.bag_name
|
|
FROM bags AS b
|
|
INNER JOIN recipe_bags AS rb ON b.bag_id = rb.bag_id
|
|
INNER JOIN recipes AS r ON rb.recipe_id = r.recipe_id
|
|
INNER JOIN tiddlers AS t ON b.bag_id = t.bag_id
|
|
WHERE r.recipe_name = $recipe_name
|
|
AND t.title = $title
|
|
ORDER BY rb.position DESC
|
|
LIMIT 1
|
|
`,{
|
|
$title: title,
|
|
$recipe_name: recipename
|
|
});
|
|
if(!rowTiddlerId) {
|
|
return null;
|
|
}
|
|
// Get the fields
|
|
const rows = this.runStatementGetAll(`
|
|
SELECT field_name, field_value
|
|
FROM fields
|
|
WHERE tiddler_id = $tiddler_id
|
|
`,{
|
|
$tiddler_id: rowTiddlerId.tiddler_id
|
|
});
|
|
return {
|
|
bag_name: rowTiddlerId.bag_name,
|
|
tiddler_id: rowTiddlerId.tiddler_id,
|
|
tiddler: rows.reduce((accumulator,value) => {
|
|
accumulator[value["field_name"]] = value.field_value;
|
|
return accumulator;
|
|
},{title: title})
|
|
};
|
|
};
|
|
|
|
/*
|
|
Get the titles of the tiddlers in a bag. Returns an empty array for bags that do not exist
|
|
*/
|
|
SqlTiddlerDatabase.prototype.getBagTiddlers = function(bagname) {
|
|
const rows = this.runStatementGetAll(`
|
|
SELECT DISTINCT title
|
|
FROM tiddlers
|
|
WHERE bag_id IN (
|
|
SELECT bag_id
|
|
FROM bags
|
|
WHERE bag_name = $bag_name
|
|
)
|
|
ORDER BY title ASC
|
|
`,{
|
|
$bag_name: bagname
|
|
});
|
|
return rows.map(value => value.title);
|
|
};
|
|
|
|
/*
|
|
Get the titles of the tiddlers in a recipe as {title:,bag_name:}. Returns an empty array for recipes that do not exist
|
|
*/
|
|
SqlTiddlerDatabase.prototype.getRecipeTiddlers = function(recipename) {
|
|
const rows = this.runStatementGetAll(`
|
|
SELECT title, bag_name
|
|
FROM (
|
|
SELECT t.title, b.bag_name, MAX(rb.position) AS position
|
|
FROM bags AS b
|
|
INNER JOIN recipe_bags AS rb ON b.bag_id = rb.bag_id
|
|
INNER JOIN recipes AS r ON rb.recipe_id = r.recipe_id
|
|
INNER JOIN tiddlers AS t ON b.bag_id = t.bag_id
|
|
WHERE r.recipe_name = $recipe_name
|
|
GROUP BY t.title
|
|
ORDER BY t.title
|
|
)
|
|
`,{
|
|
$recipe_name: recipename
|
|
});
|
|
return rows;
|
|
};
|
|
|
|
SqlTiddlerDatabase.prototype.deleteAllTiddlersInBag = function(bagname) {
|
|
this.runStatement(`
|
|
DELETE FROM tiddlers
|
|
WHERE bag_id IN (
|
|
SELECT bag_id
|
|
FROM bags
|
|
WHERE bag_name = $bag_name
|
|
)
|
|
`,{
|
|
$bag_name: bagname
|
|
});
|
|
};
|
|
|
|
/*
|
|
Get the names of the bags in a recipe. Returns an empty array for recipes that do not exist
|
|
*/
|
|
SqlTiddlerDatabase.prototype.getRecipeBags = function(recipename) {
|
|
const rows = this.runStatementGetAll(`
|
|
SELECT bags.bag_name
|
|
FROM bags
|
|
JOIN (
|
|
SELECT rb.bag_id, rb.position as position
|
|
FROM recipe_bags AS rb
|
|
JOIN recipes AS r ON rb.recipe_id = r.recipe_id
|
|
WHERE r.recipe_name = $recipe_name
|
|
ORDER BY rb.position
|
|
) AS bag_priority ON bags.bag_id = bag_priority.bag_id
|
|
ORDER BY position
|
|
`,{
|
|
$recipe_name: recipename
|
|
});
|
|
return rows.map(value => value.bag_name);
|
|
};
|
|
|
|
/*
|
|
Execute the given function in a transaction, committing if successful but rolling back if an error occurs. Returns whatever the given function returns.
|
|
|
|
Calls to this function can be safely nested, but only the top-most call will actually take place in a transaction.
|
|
*/
|
|
SqlTiddlerDatabase.prototype.transaction = function(fn) {
|
|
const alreadyInTransaction = this.transactionDepth > 0;
|
|
this.transactionDepth++;
|
|
if(alreadyInTransaction) {
|
|
return fn();
|
|
} else {
|
|
try {
|
|
this.runStatement(`BEGIN TRANSACTION`);
|
|
var result = fn();
|
|
this.runStatement(`COMMIT TRANSACTION`);
|
|
} catch(e) {
|
|
this.runStatement(`ROLLBACK TRANSACTION`);
|
|
} finally {
|
|
this.transactionDepth--;
|
|
}
|
|
return result;
|
|
}
|
|
};
|
|
|
|
exports.SqlTiddlerDatabase = SqlTiddlerDatabase;
|
|
|
|
})(); |