Mon 21 Jul 22:43:21 CEST 2025

This commit is contained in:
sbosse 2025-07-21 23:09:24 +02:00
parent 59ed706758
commit 7a0e9a8f73

357
js/db/dbQ.js Normal file
View File

@ -0,0 +1,357 @@
/**
** ==============================
** O O O OOOO
** O O O O O O
** O O O O O O
** OOOO OOOO O OOO OOOO
** O O O O O O O
** O O O O O O O
** OOOO OOOO O O OOOO
** ==============================
** Dr. Stefan Bosse http://www.bsslab.de
**
** COPYRIGHT: THIS SOFTWARE, EXECUTABLE AND SOURCE CODE IS OWNED
** BY THE AUTHOR(S).
** THIS SOURCE CODE MAY NOT BE COPIED, EXTRACTED,
** MODIFIED, OR OTHERWISE USED IN A CONTEXT
** OUTSIDE OF THE SOFTWARE SYSTEM.
**
** $AUTHORS: Stefan Bosse
** $INITIAL: (C) 2006-2019 bLAB
** $CREATED: 08/05/19 by sbosse.
** $VERSION: 1.1.2
**
** $INFO:
**
** Embedded SQL API for AIOS - requires sqlite3.js (Database wrapper) and
** sqlite3C.js (emscripten compiled sqlite3.c) in CURRENT directory
**
** Synchronous IO
**
**
** $ENDOFINFO
*/
var Io = Require('com/io');
var Comp = Require('com/compat');
var Fs = Require('fs');
var current={};
var Aios=none;
var NL='\n';
var sql = function (path) {
try { this.sqlite3 = require('./sqlite3') } catch (e) {};
console.log('[SQL] Database: '+this.sqlite3);
if (this.sqlite3) this.db = this.sqlite3(path);
this.id='SQL';
this.log=function (msg) {
((Aios && Aios.print)||Io.log)('[SQL] '+path+': '+msg);
}
this.todo=[];
}
sql.prototype.close = function () {
if (this.db) return this.db.close();
else return -1;
}
/** Create a generic table
*
* typeof @header = {} is type and name interface provider for all rows;
*
*/
sql.prototype.createTable = function (tblname,header,callback) {
var repl,
intf='', sep='', self=this;
if (!this.db || !header) return -1;
Comp.obj.iter(header,function (attr,key) {
intf += (sep+key+' '+attr); sep=',';
});
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
else return 1;
}
return this.seq([
['exec','drop table if exists '+tblname, done],
['exec','create table '+tblname+' ('+intf+')', done],
],callback);
}
/** Drop table operation
*
*/
sql.prototype.drop = function (tblname,callback) {
var repl,self=this,
line,
sep='';
if (!this.db) return false;
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
else return 1;
}
return this.seq([
['exec','drop table if exists '+tblname, done]
], callback);
}
/** Insert operation
*
*/
sql.prototype.insert = function (tblname,row,callback) {
var repl,self=this,
line='',
sep='';
if (!this.db) return false;
Comp.array.iter(row,function (col,i) {
line += sep+(Comp.obj.isNumber(col)?int(col):"'"+col+"'"); sep=',';
});
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
else return 1;
}
return this.seq([
['exec','insert into '+tblname+' values ('+line+')', done]
], callback);
}
/** Insert a row in a matrix table
*
*/
sql.prototype.insertMatrix = function (matname,row,callback) {
var repl,self=this,
line='',
sep='';
if (!this.db) return false;
Comp.array.iter(row,function (col,i) {
line += sep+(Comp.obj.isNumber(col)?int(col):"'"+col+"'"); sep=',';
});
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
else return 1;
}
return this.seq([
['exec','insert into '+matname+' values ('+line+')', done]
], callback);
}
sql.prototype.insertTable = sql.prototype.insert;
sql.prototype.open = function () {
if (this.db) return this.db.open();
else return -1;
}
/** Read a matrix
*
*/
sql.prototype.readMatrix = function (matname,callback) {
var mat=[],self=this;
if (!this.db) return false;
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
if (repl.result) {
mat=repl.result.map(function (row) {
var cols=[];
for(var p in row) cols.push(Number(row[p]));
return cols;
})
}
return 1;
}
this.seq([
['exec','select * from '+matname,done],
], callback?function (res) { if (res) callback(mat); else callback(none);}:undefined);
if (callback) return; else return mat;
}
sql.prototype.readTable = function (tblname,callback) {
var tbl=[],self=this;
if (!this.db) return false;
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
if (repl.result) {
tbl=repl.result.map(function (row) {
var cols=[];
for(var p in row) cols.push(Number(row[p]));
return cols;
})
}
return 1;
}
this.seq([
['exec','select * from '+tblname, done],
], callback?function (res) { if (res) callback(tbl); else callback(none);}:undefined);
if (callback) return; else return tbl;
}
/** SELECT operation
* tbl: string
* vars?: string | string []
* cond: string | undefined
* callback: function (result)
*
*/
sql.prototype.select = function (tblname,vars,cond,callback) {
var self=this,result;
if (!this.db) return false;
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
if (repl.result) result=repl.result;
return 1;
}
if (vars==undefined) vars='*';
return this.seq([
['exec',Comp.printf.sprintf('select %s from %s%s',
Comp.obj.isArray(vars)?Comp.printf.list(vars):vars,
tblname,
cond?(' WHERE '+cond):''),done]
], callback?function (res) { if (res) callback(result); else callback(none);}:undefined);
if (callback) return; else return result;
}
/** Execute an SQL operation sequence
** todo format: [op: string,
** args?: string,
** result: function returning number (0: break (error), 1: next, -1:loop)]
** callback: function () -> status
*/
sql.prototype.seq = function (todo,callback) {
var l=todo,self=this,status,res,
next;
if (callback) { // Async non.block.
function Todo() {
if (self.todo.length>0) {
var f = Comp.array.head(self.todo);
self.error=undefined;
f(_,function () {
self.todo = Comp.array.tail(self.todo);
Todo();
});
}
}
next=function (loop,finalize) {
var hd,repl;
if (l.length==0 && !loop) { callback(status); if (finalize) finalize() }
else {
if (!loop) {
hd= Comp.array.head(l);
l = Comp.array.tail(l);
} else hd=loop;
switch (hd[0]) {
case 'exec':
repl=self.db.exec(hd[1])
status=hd[2](repl);
if (status==1) next(_,finalize);
else if (status==-1) next(hd,finalize);
else callback(status);
break;
}
}
}
self.todo.push(next);
if (self.todo.length==1) Todo();
return;
} else { // Sync block.
next=function (loop) {
if (l.length==0 && !loop) return status;
else {
if (!loop) {
hd= Comp.array.head(l);
l = Comp.array.tail(l);
} else hd=loop;
switch (hd[0]) {
case 'exec':
res=self.db.exec(hd[1]);
status=hd[2](res);
if (status==1) return next();
else if (status==-1) return next(hd);
else return status;
break;
}
}
}
return next();
}
};
/** Write matrix values
*
*/
sql.prototype.writeMatrix = function (matname,matrix,callback) {
var repl, line='', seq=[], self=this,
intf='', sep='', i=0, row;
if (!this.db) return false;
if (matrix.length==0) return false;
row=matrix[0];
Comp.array.iter(row,function (col,i) {
intf += sep+'c'+(i+1)+(Comp.obj.isNumber(col)?' integer':' varchar(32)'); sep=',';
});
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
else return 1;
}
seq=[
['exec','drop table if exists '+matname, done],
['exec','create table '+matname+' ('+intf+')', done]
];
for(i=0;i<matrix.length;i++) {
row=matrix[i];
line='',sep='';
Comp.array.iter(row,function (col,i) {
line += sep+(Comp.obj.isNumber(col)?int(col):"'"+col+"'"); sep=',';
});
seq.push(['exec','insert into '+matname+' values ('+line+')',done])
}
return this.seq(seq,callback);
}
/** Write table values
*
*/
sql.prototype.writeTable = function (tblname,header,table,callback) {
var repl, line='', seq=[], self=this,
intf='', sep='', i=0, row;
if (!this.db) return false;
row=table[0];
Comp.obj.iter(row,function (val,key) {
intf += sep+'c'+(i+1)+(Comp.obj.isNumber(val)?' integer':' varchar(32)'); sep=',';
});
function done(repl) {
if (!repl || !repl.ok) {self.error=repl.code;return 0;}
else return 1;
}
seq=[
['exec','drop table if exists '+tblname, done],
['exec','create table '+tblname+' ('+intf+')', done]
];
for(i=0;i<table.length;i++) {
row=table[i];
line='',sep='';
Comp.obj.iter(row,function (val,key) {
line += sep+(Comp.obj.isNumber(val)?int(val):"'"+val+"'"); sep=',';
});
seq.push(['exec','insert into '+tblname+' values ('+line+')',done])
}
return this.seq(seq,callback);
}
var Sql = function (path) {
var obj = new sql(path);
return obj;
};
module.exports = {
current:function (module) { current=module.current; Aios=module; },
Sql:Sql
};