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Code Issues Releases Wiki Activity

Use the empty string as special plugin name for ordinary tiddlers

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Using NULL was working against the grain of SQL
This commit is contained in:
Jeremy Ruston 2023-10-24 18:41:34 +01:00
parent 863066d41f
commit d4dec0ca65
3 changed files with 49 additions and 78 deletions
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122
plugins/tiddlywiki/sqlite3store/sql-functions.js
View File

@ -45,14 +45,14 @@ $tw.SqlFunctions = function(options) {
sql: `
DROP TABLE IF EXISTS plugins;
CREATE TABLE plugins (
plugintitle TEXT NOT NULL,
plugintitle TEXT NOT NULL, -- Empty string shoud be the highest priority
priority INTEGER NOT NULL,
PRIMARY KEY(plugintitle)
);
DROP TABLE IF EXISTS tiddlers;
CREATE TABLE tiddlers (
title TEXT NOT NULL ${COLLATION_CLAUSE},
plugintitle TEXT, -- or NULL for non-shadow tiddlers
plugintitle TEXT NOT NULL, -- Empty string for tiddlers that are not part of a plugin
meta TEXT NOT NULL,
text TEXT NOT NULL,
PRIMARY KEY(title,plugintitle)
@ -61,7 +61,7 @@ $tw.SqlFunctions = function(options) {
DROP TABLE IF EXISTS titles;
CREATE TABLE titles (
title TEXT NOT NULL ${COLLATION_CLAUSE},
plugintitle TEXT, -- or NULL for non-shadow tiddlers
plugintitle TEXT NOT NULL, -- Empty string for tiddlers that are not part of a plugin
PRIMARY KEY(title)
);
`
@ -70,7 +70,7 @@ $tw.SqlFunctions = function(options) {
Debugging
*/
var statementLogTiddlersTable = self.db.prepare("select title, plugintitle, meta, text from tiddlers order by title, plugintitle;"),
statementLogPluginsTable = self.db.prepare("select plugintitle, priority from plugins order by plugintitle;"),
statementLogPluginsTable = self.db.prepare("select plugintitle, priority from plugins order by priority;"),
statementLogTitlesTable = self.db.prepare("select title, plugintitle from titles order by title;");
function sqlLogTable(statement) {
let resultRows = [];
@ -90,11 +90,12 @@ $tw.SqlFunctions = function(options) {
Set the plugin priorities
*/
this.sqlSetPluginPriorities = function(prioritisedPluginTitles) {
const plugintitles = prioritisedPluginTitles.concat([""]);
self.db.exec({
sql: "DELETE FROM plugins"
});
let priority = 1;
for(const plugintitle of prioritisedPluginTitles) {
for(const plugintitle of plugintitles) {
self.db.exec({
sql: "insert or replace into plugins (plugintitle, priority) values ($plugintitle, $priority)",
bind: {
@ -117,26 +118,21 @@ $tw.SqlFunctions = function(options) {
INSERT OR REPLACE INTO titles (title, plugintitle)
SELECT
t.title,
CASE
WHEN t.null_count > 0 THEN NULL
ELSE t.max_priority_plugintitle
END AS plugintitle
FROM (
SELECT
t.title,
SUM(CASE WHEN t.plugintitle IS NULL THEN 1 ELSE 0 END) AS null_count,
MAX(p.priority) AS max_priority,
FIRST_VALUE(t.plugintitle) OVER (PARTITION BY t.title ORDER BY p.priority DESC) AS max_priority_plugintitle
FROM tiddlers t
LEFT JOIN plugins p ON t.plugintitle = p.plugintitle
WHERE t.title = $title
GROUP BY t.title
) AS t;
(SELECT t2.plugintitle
FROM tiddlers AS t2
JOIN plugins AS p ON t2.plugintitle = p.plugintitle
WHERE t2.title = t.title
ORDER BY p.priority DESC
LIMIT 1
) AS plugintitle
FROM tiddlers AS t
WHERE t.title = $title;
`);
this.sqlSaveTiddler = function(tiddlerFields,plugintitle) {
plugintitle = plugintitle || "";
querySaveTiddlerTableTiddlers.bind({
$title: tiddlerFields.title,
$plugintitle: plugintitle || null,
$plugintitle: plugintitle,
$meta: JSON.stringify(Object.assign({},tiddlerFields,{title: undefined, text: undefined})),
$text: tiddlerFields.text || ""
});
@ -153,36 +149,22 @@ $tw.SqlFunctions = function(options) {
*/
var statementDeleteTiddlerDeleteFromTiddlers = self.db.prepare(`
DELETE FROM tiddlers
WHERE title = $title AND plugintitle IS NULL;
WHERE title = $title AND plugintitle = $plugintitle;
`);
var statementDeleteTiddlerFindShadow = self.db.prepare(`
WITH HighestPriority AS (
SELECT
plugintitle,
MAX(priority) AS max_priority
FROM
plugins
WHERE
plugintitle IS NOT NULL
GROUP BY
plugintitle
)
SELECT
t.title,
t.plugintitle,
t.meta,
t.text
FROM
tiddlers AS t
JOIN
HighestPriority AS ho ON t.plugintitle = ho.plugintitle
WHERE
t.title = $title;
SELECT t.title, t.plugintitle
FROM tiddlers AS t
JOIN plugins AS p ON t.plugintitle = p.plugintitle
WHERE t.title = $title
ORDER BY p.priority DESC
LIMIT 1;
`);
this.sqlDeleteTiddler = function(title) {
this.sqlDeleteTiddler = function(title,plugintitle) {
plugintitle = plugintitle || "";
// Delete the tiddler from the tiddlers table
statementDeleteTiddlerDeleteFromTiddlers.bind({
$title: title
$title: title,
$plugintitle: plugintitle
});
statementDeleteTiddlerDeleteFromTiddlers.step();
statementDeleteTiddlerDeleteFromTiddlers.reset();
@ -191,8 +173,8 @@ $tw.SqlFunctions = function(options) {
$title: title
});
if(statementDeleteTiddlerFindShadow.step()) {
// There is a corresponding shadow
var row = statementDeleteTiddlerFindShadow.get({});
statementDeleteTiddlerFindShadow.reset();
// Replace the tiddler with the shadow
self.db.exec({
sql: "insert or replace into titles (title, plugintitle) values ($title, $plugintitle)",
@ -202,8 +184,8 @@ $tw.SqlFunctions = function(options) {
}
});
} else {
// There is no corresponding shadow
// Delete the tiddler
statementDeleteTiddlerFindShadow.reset();
// There is no shadow tiddler, so just delete the tiddler
self.db.exec({
sql: "delete from titles where title = $title",
bind: {
@ -211,23 +193,22 @@ $tw.SqlFunctions = function(options) {
}
});
}
statementDeleteTiddlerFindShadow.reset();
};
/*
Remove all shadow tiddlers
*/
this.sqlClearShadows = function() {
self.db.exec({
sql: "delete from tiddlers where plugintitle is not null"
sql: "delete from tiddlers where plugintitle != '';"
});
self.db.exec({
sql: "delete from titles where plugintitle is not null"
sql: "delete from titles where plugintitle != '';"
});
};
/*
Check whether a tiddler exists
*/
var statementTiddlerExists = self.db.prepare(`select title from titles where title = $title and plugintitle is null;`)
var statementTiddlerExists = self.db.prepare(`select title from titles where title = $title and plugintitle = '';`)
this.sqlTiddlerExists = function(title) {
statementTiddlerExists.bind({
$title: title
@ -247,7 +228,7 @@ $tw.SqlFunctions = function(options) {
select t.title, ti.meta, ti.text
FROM titles AS t
JOIN tiddlers AS ti
ON t.title = ti.title AND (t.plugintitle = ti.plugintitle OR (t.plugintitle IS NULL AND ti.plugintitle IS NULL))
ON t.title = ti.title AND t.plugintitle = ti.plugintitle
WHERE t.title = $title;
`);
this.sqlGetTiddler = function(title) {
@ -267,25 +248,12 @@ $tw.SqlFunctions = function(options) {
Get the plugin from which a tiddler came
*/
var statementGetShadowSource = self.db.prepare(`
WITH HighestPriority AS (
SELECT
plugintitle,
MAX(priority) AS max_priority
FROM
plugins
WHERE
plugintitle IS NOT NULL
GROUP BY
plugintitle
)
SELECT
t.plugintitle
FROM
tiddlers AS t
JOIN
HighestPriority AS ho ON t.plugintitle = ho.plugintitle
WHERE
t.title = $title;
SELECT t.title, t.plugintitle
FROM tiddlers AS t
LEFT JOIN plugins AS p ON t.plugintitle = p.plugintitle
WHERE t.title = $title AND t.plugintitle <> ''
ORDER BY p.priority DESC
LIMIT 1;
`);
this.sqlGetShadowSource = function(title) {
statementGetShadowSource.bind({
@ -319,7 +287,7 @@ $tw.SqlFunctions = function(options) {
var statementAllShadowTitles = self.db.prepare(`
SELECT title
FROM tiddlers
WHERE plugintitle IS NOT NULL
WHERE plugintitle != ''
ORDER BY title ${COLLATION_CLAUSE}
`);
this.sqlAllShadowTitles = function() {
@ -337,8 +305,8 @@ $tw.SqlFunctions = function(options) {
var statementEachTiddler = self.db.prepare(`
SELECT t.title, ti.meta, ti.text
FROM titles AS t
LEFT JOIN tiddlers AS ti ON t.title = ti.title AND t.plugintitle IS NULL AND ti.plugintitle IS NULL
WHERE t.plugintitle IS NULL
LEFT JOIN tiddlers AS ti ON t.title = ti.title AND t.plugintitle = ti.plugintitle
WHERE t.plugintitle == ''
ORDER BY t.title ${COLLATION_CLAUSE}
`);
this.sqlEachTiddler = function(callback) {
@ -356,7 +324,7 @@ $tw.SqlFunctions = function(options) {
SELECT DISTINCT t.title, td.meta, td.text
FROM titles AS t
JOIN tiddlers AS td ON t.title = td.title
WHERE td.plugintitle IS NOT NULL
WHERE td.plugintitle != ''
ORDER BY t.title ${COLLATION_CLAUSE};
`);
this.sqlEachShadowTiddler = function(callback) {

3
plugins/tiddlywiki/sqlite3store/sql-wiki-store.js
View File

@ -13,6 +13,7 @@ This file is spliced into the HTML file to be executed before the boot kernel ha
$tw.Wiki = function(options) {
options = options || {};
this.sqlFunctions = new $tw.SqlFunctions();
this.sqlFunctions.sqlSetPluginPriorities([]);
// Adapted version of the boot.js wiki store implementation follows
var self = this,
getTiddlerTitles = function() {
@ -158,7 +159,7 @@ $tw.Wiki = function(options) {
var title = tiddler.fields.title;
if(title) {
// Save the new tiddler
self.sqlFunctions.sqlSaveTiddler(tiddler.getFieldStrings());
self.sqlFunctions.sqlSaveTiddler(tiddler.fields);
// Update caches
this.clearCache(title);
this.clearGlobalCache();

2
plugins/tiddlywiki/sqlite3store/test-sql-functions.js
View File

@ -104,6 +104,8 @@ test("Instantiating the database", function () {
const titles = sqlFunctions.sqlAllShadowTitles();
assert.equal(titles,result,message);
}
// Set priorities for the plugins we'll use
sqlFunctions.sqlSetPluginPriorities([]);
// Save and verify an ordinary tiddler
sqlFunctions.sqlSaveTiddler({
title: "HelloThere",