mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-07-06 04:03:16 +00:00
248 lines
8.1 KiB
JavaScript
248 lines
8.1 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/sqlite3store/sql-functions.js
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type: application/javascript
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Functions to perform basic tiddler operations with a sqlite3 database
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This file is spliced into the HTML file to be executed before the boot kernel has been loaded.
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\*/
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(function() {
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$tw.SqlFunctions = function(options) {
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options = options || {};
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var self = this;
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this.db = new $tw.sqlite3.oo1.DB("","c");
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// Setup custom collation to precisely match existing sort orders
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// Create field with `title TEXT NOT NULL COLLATE custom_collation`
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// Use it like `... order by shadow collate custom_collation`
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// function customCollation(ptr,lenA,a,lenB,b) {
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// var jsA = $tw.sqlite3.wasm.cstrToJs(a).slice(0,lenA),
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// jsB = $tw.sqlite3.wasm.cstrToJs(b).slice(0,lenB);
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// if(jsA < jsB) {
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// return -1;
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// } else if (jsA > jsB) {
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// return +1;
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// } else {
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// return 0;
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// }
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// }
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// var SQLITE_UTF8 = 1; /* IMP: R-37514-35566 */
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// var SQLITE_UTF16LE = 2; /* IMP: R-03371-37637 */
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// var SQLITE_UTF16BE = 3; /* IMP: R-51971-34154 */
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// var SQLITE_UTF16 = 4; /* Use native byte order */
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// var SQLITE_ANY = 5; /* Deprecated */
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// var SQLITE_UTF16_ALIGNED = 8; /* sqlite3_create_collation only */
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// var collationResult = $tw.sqlite3.capi.sqlite3_create_collation_v2(this.db.pointer,"custom_collation",SQLITE_UTF8,this,customCollation,0);
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/*
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Create tables and indexes
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*/
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self.db.exec({
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sql: `
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DROP TABLE IF EXISTS tiddlers;
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CREATE TABLE tiddlers (
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title TEXT NOT NULL,
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shadow INTEGER NOT NULL CHECK (shadow = 0 OR shadow = 1), -- 0=real tiddler, 1=shadow tiddler
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shadowsource TEXT,
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meta TEXT NOT NULL,
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text TEXT NOT NULL,
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PRIMARY KEY(title,shadow)
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);
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CREATE INDEX tiddlers_title_index ON tiddlers(title);
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`
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});
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/*
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Save a tiddler. shadowSource should be falsy for ordinary tiddlers, or the source plugin title for shadow tiddlers
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*/
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var statementSaveTiddler = self.db.prepare("replace into tiddlers(title,shadow,shadowsource,meta,text) values ($title,$shadow,$shadowsource,$meta,$text);");
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this.sqlSaveTiddler = function(tiddlerFields,shadowSource) {
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statementSaveTiddler.bind({
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$title: tiddlerFields.title,
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$shadow: shadowSource ? 1 : 0,
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$shadowsource: shadowSource ? shadowSource : null,
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$meta: JSON.stringify(Object.assign({},tiddlerFields,{title: undefined, text: undefined})),
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$text: tiddlerFields.text || ""
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});
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statementSaveTiddler.step();
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statementSaveTiddler.reset();
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};
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this.sqlDeleteTiddler = function(title) {
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self.db.exec({
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sql: "delete from tiddlers where title = $title and shadow = 0",
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bind: {
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$title: title
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}
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});
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};
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this.sqlClearShadows = function() {
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self.db.exec({
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sql: "delete from tiddlers where shadow = 1"
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});
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};
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var statementTiddlerExists = self.db.prepare("select title from tiddlers where title = $title and shadow = 0;")
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this.sqlTiddlerExists = function(title) {
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statementTiddlerExists.bind({
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$title: title
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});
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if(statementTiddlerExists.step()) {
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statementTiddlerExists.reset();
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return true;
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} else {
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statementTiddlerExists.reset();
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return false;
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}
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};
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var statementGetTiddler = self.db.prepare("select title, shadow, meta, text from tiddlers where title = $title order by shadow");
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this.sqlGetTiddler = function(title) {
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statementGetTiddler.bind({
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$title: title
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});
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if(statementGetTiddler.step()) {
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var row = statementGetTiddler.get({});
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statementGetTiddler.reset();
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return Object.assign({},JSON.parse(row.meta),{title: row.title, text: row.text});
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} else {
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statementGetTiddler.reset();
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return undefined;
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}
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};
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var statementGetShadowSource = self.db.prepare("select title, shadowsource from tiddlers where title = $title and shadow = 1");
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this.sqlGetShadowSource = function(title) {
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statementGetShadowSource.bind({
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$title: title
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});
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if(statementGetShadowSource.step()) {
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var row = statementGetShadowSource.get({});
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statementGetShadowSource.reset();
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return row.shadowsource;
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} else {
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statementGetShadowSource.reset();
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return undefined;
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}
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};
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var statementAllTitles = self.db.prepare("select title from tiddlers where shadow = 0 order by title");
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this.sqlAllTitles = function() {
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let resultRows = [];
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while(statementAllTitles.step()) {
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var row = statementAllTitles.get({});
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resultRows.push(row.title);
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}
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statementAllTitles.reset();
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return resultRows;
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};
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var statementAllShadowTitles = self.db.prepare("select title from tiddlers where shadow = 1 order by title");
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this.sqlAllShadowTitles = function() {
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let resultRows = [];
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while(statementAllShadowTitles.step()) {
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var row = statementAllShadowTitles.get({});
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resultRows.push(row.title);
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}
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statementAllShadowTitles.reset();
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return resultRows;
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};
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var statementEachTiddler = self.db.prepare("select title, meta, text from tiddlers where shadow = 0 order by title");
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this.sqlEachTiddler = function(callback) {
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while(statementEachTiddler.step()) {
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var row = statementEachTiddler.get({}),
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tiddlerFields = Object.assign({},JSON.parse(row.meta),{title: row.title, text: row.text});
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callback(tiddlerFields,row.title);
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}
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statementEachTiddler.reset();
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};
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/*
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We get all the rows where either the shadow field is 1 and there is no row with the same title and
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a shadow field value of zero, or the shadow field is zero and there also exists a row with the same
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title and a shadow field value of 1
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*/
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var statementEachShadowTiddler = self.db.prepare(`
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select title, meta, text
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from tiddlers t1
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where t1.shadow = 1
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and not exists (
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select 1
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from tiddlers t2
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where t2.title = t1.title
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and t2.shadow = 0
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)
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union
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select title, meta, text
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from tiddlers t3
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where t3.shadow = 0
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and exists (
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select 1
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from tiddlers t4
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where t4.title = t3.title
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and t4.shadow = 1
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)
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order by title;
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`);
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this.sqlEachShadowTiddler = function(callback) {
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while(statementEachShadowTiddler.step()) {
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var row = statementEachShadowTiddler.get({});
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var tiddlerFields = Object.assign({},JSON.parse(row.meta),{title: row.title, text: row.text});
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callback(tiddlerFields,row.title);
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}
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statementEachShadowTiddler.reset();
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};
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/*
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Return all the tiddler rows that have the "shadow" field set to 1, but only where the "title"
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field doesn't appear in a row with the "shadow" field set to 0
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*/
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var statementEachTiddlerPlusShadows = self.db.prepare(`
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select title,meta,text from tiddlers t1
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where t1.shadow = 1
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and not exists (
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select 1
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from tiddlers t2
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where t2.title = t1.title
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and t2.shadow = 0
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)
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order by t1.title;
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`);
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this.sqlEachTiddlerPlusShadows = function(callback) {
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self.sqlEachTiddler(callback);
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while(statementEachTiddlerPlusShadows.step()) {
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var row = statementEachTiddlerPlusShadows.get({});
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var tiddlerFields = Object.assign({},JSON.parse(row.meta),{title: row.title, text: row.text});
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callback(tiddlerFields,row.title);
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}
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statementEachTiddlerPlusShadows.reset();
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};
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/*
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Return all rows where the shadow field is zero, and there is no row with the same title and a shadow field of 1
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*/
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var statementEachShadowPlusTiddlers = self.db.prepare(`
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select title,meta,text from tiddlers t1
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where t1.shadow = 0
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and not exists (
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select 1
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from tiddlers t2
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where t2.title = t1.title
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and t2.shadow = 1
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)
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order by t1.title;
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`);
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this.sqlEachShadowPlusTiddlers = function(callback) {
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self.sqlEachShadowTiddler(callback);
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while(statementEachShadowPlusTiddlers.step()) {
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var row = statementEachShadowPlusTiddlers.get({});
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var tiddlerFields = Object.assign({},JSON.parse(row.meta),{title: row.title, text: row.text});
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callback(tiddlerFields,row.title);
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}
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statementEachShadowPlusTiddlers.reset();
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};
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var statementLogTables = self.db.prepare("select title, shadow, meta, text from tiddlers order by title,shadow");
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this.sqlLogTables = function() {
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let resultRows = [];
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while(statementLogTables.step()) {
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var row = statementLogTables.get({});
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resultRows.push(row);
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}
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statementLogTables.reset();
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console.log(resultRows);
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};
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};
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})();
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//# sourceURL=$:/plugins/tiddlywiki/sqlite3store/sql-functions.js
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