SQLite

bin.stripccomments := $(dir.tool)/stripccomments
$(bin.stripccomments): $(bin.stripccomments).c $(MAKEFILE)
	$(CC) -o $@ $<
DISTCLEAN_FILES += $(bin.stripccomments)


########################################################################
# C-PP.FILTER: a $(call)able to transform $(1) to $(2) via:
#
#   ./c-pp -f $(1) -o $(2) $(3)
#
# Historical notes:
#
# - We first attempted to use gcc and/or clang to preprocess JS files
#   in the same way we would normally do C files, but C-specific quirks
#   of each makes that untennable.
#

#
# $1 = one of: $(JS_BUILD_NAMES)
# $2 = build mode name: one of $(JS_BUILD_MODES)
# $3 = 1 for ESM build mode, else 0
# $4 = resulting sqlite-api JS/MJS file
# $5 = resulting JS/MJS file
# $6 = -D... flags for $(bin.c-pp)
# $7 = optional extra flags for emcc
#
# Maintenance reminder: be careful not to introduce spaces around args
# ($1, $2), otherwise string concatenation will malfunction.
#
# Before calling this, emcc.environment.$(2) must be set to a value
# for emcc's -sENVIRONMENT flag.
#
# $(cflags.$(1)) and $(cflags.$(1).$(2)) may be defined to append
# CFLAGS to a given build mode.
#
# $(emcc.flags.$(1)) and $(emcc.flags.$(1).$(2)) may be defined to
# append emcc-specific flags to a given build mode.
define SETUP_LIB_BUILD_MODE

# themselves use importScripts() or Workers or URL() constructors
# which refer to other in-tree (m)JS files quire a bundler-friendly
# copy.
sqlite3-worker1.js.in := $(dir.api)/sqlite3-worker1.c-pp.js
sqlite3-worker1-promiser.js.in := $(dir.api)/sqlite3-worker1-promiser.c-pp.js
sqlite3-worker1.js := $(dir.dout)/sqlite3-worker1.js
sqlite3-worker1-promiser.js := $(dir.dout)/sqlite3-worker1-promiser.js
sqlite3-worker1-promiser.mjs := $(dir.dout)/sqlite3-worker1-promiser.mjs
sqlite3-worker1-bundler-friendly.js := $(dir.dout)/sqlite3-worker1-bundler-friendly.mjs
sqlite3-worker1-promiser-bundler-friendly.js := $(dir.dout)/sqlite3-worker1-promiser-bundler-friendly.js
$(eval $(call C-PP.FILTER,$(sqlite3-worker1.js.in),$(sqlite3-worker1.js)))
$(eval $(call C-PP.FILTER,$(sqlite3-worker1.js.in),$(sqlite3-worker1-bundler-friendly.js),\
    $(c-pp.D.sqlite3-bundler-friendly)))
$(eval $(call C-PP.FILTER,$(sqlite3-worker1-promiser.js.in),$(sqlite3-worker1-promiser.js)))
$(eval $(call C-PP.FILTER,$(sqlite3-worker1-promiser.js.in),\
    $(sqlite3-worker1-promiser-bundler-friendly.js),\
    $(c-pp.D.sqlite3-bundler-friendly)))
$(eval $(call C-PP.FILTER,$(sqlite3-worker1-promiser.js.in),$(sqlite3-worker1-promiser.mjs),\
    -Dtarget=es6-module -Dtarget=es6-bundler-friendly))
$(sqlite3-bundler-friendly.mjs): $(sqlite3-worker1-bundler-friendly.js) \
    $(sqlite3-worker1-promiser-bundler-friendly.js)
$(sqlite3.js) $(sqlite3.mjs): $(sqlite3-worker1.js) \
    $(sqlite3-worker1-promiser.js) $(sqlite3-worker1-promiser.mjs)
########################################################################
# batch-runner.js is part of one of the test apps which reads in SQL
# dumps generated by $(speedtest1) and executes them.
dir.sql := sql
speedtest1 := ../../speedtest1
speedtest1.c := ../../test/speedtest1.c
speedtest1.sql := $(dir.sql)/speedtest1.sql

   config option may alternately be a function, in which case this
   function re-assigns this property with the result of calling that
   function, enabling delayed instantiation of a Worker.

   - `onready` (optional, but...): this callback is called with no
   arguments when the worker fires its initial
   'sqlite3-api'/'worker1-ready' message, which it does when
   sqlite3.initWorker1API() completes its initialization. This is the
   simplest way to tell the worker to kick off work at the earliest
   opportunity, and the only way to know when the worker module has
   completed loading. The irony of using a callback for this, instead
   of returning a promise from sqlite3Worker1Promiser() is not lost on
   the developers, but initial attempts to return a promise resulted
   in a much clumsier interface.

   - `onunhandled` (optional): a callback which gets passed the
   message event object for any worker.onmessage() events which
   are not handled by this proxy. Ideally that "should" never
   happen, as this proxy aims to handle all known message types.

   - `generateMessageId` (optional): a function which, when passed an

//#ifnot target=es6-bundler-friendly
  .bind({
    currentScript: globalThis?.document?.currentScript
  })
//#endif
  ,
  onerror: (...args)=>console.error('worker1 promiser error',...args)
}/*defaultConfig*/;

/**
   sqlite3Worker1Promiser.v2() works identically to
   sqlite3Worker1Promiser() except that it returns a promise instead
   of relying an an onready callback in the config object.
*/
sqlite3Worker1Promiser.v2 = function(config){
  const x = Object.create(null);
  let oldFunc;
  if( 'function' == typeof config ){
    oldFunc = config;
    config = {};
  }else if('function'===typeof config?.onready){
    oldFunc = config.onready;
    delete config.onready;
  }
  config = Object.assign((config || Object.create(null)),{
    onready: function(func){
      try {
        if( oldFunc ){
          oldFunc(func);
        }
        x.resolve(func);
      }
      catch(e){x.reject(e)}
    }
  });
  const p = new Promise(function(resolve,reject){
    x.resolve = resolve;
    x.reject = reject;
  });
  sqlite3Worker1Promiser(config);
  return p;
};

//#if target=es6-module
export default sqlite3Worker1Promiser.v2;
//#endif /* target=es6-module */
//#else
/* Built with the omit-oo1 flag. */
//#endif ifnot omit-oo1

  ***********************************************************************

  Demonstration of the sqlite3 Worker API #1 Promiser: a Promise-based
  proxy for for the sqlite3 Worker #1 API.
*/
'use strict';
(async function(){
  const T = globalThis.SqliteTestUtil;
  const eOutput = document.querySelector('#test-output');
  const warn = console.warn.bind(console);
  const error = console.error.bind(console);
  const log = console.log.bind(console);
  const logHtml = async function(cssClass,...args){
    log.apply(this, args);
    const ln = document.createElement('div');

      w.onerror = (event)=>error("worker.onerror",event);
      return w;
    },
    debug: 1 ? undefined : (...args)=>console.debug('worker debug',...args),
    onunhandled: function(ev){
      error("Unhandled worker message:",ev.data);
    },
    onerror: function(ev){
      error("worker1 error:",ev);



    },
    onready: function(f){

      warn("This is the v2 interface - don't pass an onready() function.");
    }
  };
  const workerPromise = await globalThis.sqlite3Worker1Promiser.v2(promiserConfig)
        .then((func)=>{
          log("Init complete. Starting tests momentarily.");
          globalThis.sqlite3TestModule.setStatus(null)/*hide the HTML-side is-loading spinner*/;
          return func;
        });
  delete globalThis.sqlite3Worker1Promiser;

  const wtest = async function(msgType, msgArgs, callback){
    if(2===arguments.length && 'function'===typeof msgArgs){
      callback = msgArgs;
      msgArgs = undefined;
    }
    const p = 1

    });

    await wtest('close', (ev)=>{
      T.assert(undefined === ev.result.filename);
    }).finally(()=>logHtml('',"That's all, folks!"));
  }/*runTests2()*/;

  runTests();
})();