path: root/src/js/sb3-gen.js

'use strict';

const { Project } = require('sb-edit');
const util = require('util');

// TODO: set prefix to \t
function indent(string, prefix = '    ') {
    return string.split('\n').map(l => prefix + l).join('\n');
}

function input(inp, target, flag = false) {
    if (!inp) {
        return '';
    }
    const val = inp.value.replace ? inp.value.replace(/[()\[\]]|v$/g, m => '\\' + m) : inp.value;
    switch (inp.type) {
        case 'number':
        case 'angle':
            return `(${val})`;

        case 'string':
            return `[${val}]`;

        case 'variable':
        case 'list':
        case 'graphicEffect':
        case 'rotationStyle':
        case 'greaterThanMenu':
        case 'stopMenu':
        case 'dragModeMenu':
        case 'propertyOfMenu':
        case 'currentMenu':
        case 'mathopMenu':
        case 'frontBackMenu':
        case 'forwardBackwardMenu':
        case 'costumeNumberName':
            return `[${val} v]`;

        case 'costume':
        case 'sound':
        case 'goToTarget':
        case 'pointTowardsTarget':
        case 'penColorParam':
        case 'target':
        case 'cloneTarget':
        case 'touchingTarget':
        case 'distanceToMenu':
            return `(${val} v)`;

        case 'broadcast':
        case 'backdrop':
        case 'key':
            if (flag) {
                return `[${val} v]`;
            } else {
                return `(${val} v)`;
            }

        case 'color':
            const hex = k => inp.value[k].toString(16).padStart(2, '0')
            return `[#${hex('r') + hex('g') + hex('b')}]`;

        case 'block':
            if (flag) {
                return '\n' + indent(blockToScratchblocks(inp.value, target)) + '\n';
            } else {
                return blockToScratchblocks(inp.value, target);
            }

        case 'blocks':
            return '\n' + indent(blocksToScratchblocks(inp.value, target)) + '\n';

        default:
            return `\x1b[33m<${inp.type}>\x1b[0m`;
    }
}

function blockToScratchblocks(block, target) {
    if (!target) {
        throw new Error('expected target');
    }

    const i = (key, ...args) => input(block.inputs[key], target, ...args);
    const operator = op => `(${i('NUM1')} ${op} ${i('NUM2')})`;
    const boolop = op => `<${i('OPERAND1')} ${op} ${i('OPERAND2')}>`;

    switch (block.opcode) {

            // motion ------------------------------------------------------ //
        case 'motion_movesteps':
            return `move ${i('STEPS')} steps`;
        case 'motion_turnright':
            return `turn cw ${i('DEGREES')} degrees`;
        case 'motion_turnleft':
            return `turn ccw ${i('DEGREES')} degrees`;
        case 'motion_goto':
            return `go to ${i('TO')}`;
        case 'motion_gotoxy':
            return `go to x: ${i('X')} y: ${i('Y')}`;
        case `motion_glideto`:
            return `glide ${i('SECS')} secs to ${i('TO')}`;
        case `motion_glidesecstoxy`:
            return `glide ${i('SECS')} secs to x: ${i('X')} y: ${i('Y')}`;
        case 'motion_pointindirection':
            return `point in direction ${i('DIRECTION')}`;
        case 'motion_pointtowards':
            return `point towards ${i('TOWARDS')}`;
        case 'motion_changexby':
            return `change x by ${i('DX')}`;
        case 'motion_setx':
            return `set x to ${i('X')}`;
        case 'motion_changeyby':
            return `change y by ${i('DY')}`;
        case 'motion_sety':
            return `set y to ${i('Y')}`;
        case 'motion_ifonedgebounce':
            return 'if on edge, bounce';
        case 'motion_setrotationstyle':
            return `set rotation style ${i('STYLE')}`;
        case 'motion_xposition':
            return '(x position)';
        case 'motion_yposition':
            return '(y position)';
        case 'motion_direction':
            return '(direction)';

            // looks ------------------------------------------------------- //
        case 'looks_sayforsecs':
            return `say ${i('MESSAGE')} for ${i('SECS')} seconds`;
        case 'looks_say':
            return `say ${i('MESSAGE')}`;
        case 'looks_thinkforsecs':
            return `think ${i('MESSAGE')} for ${i('SECS')} seconds`;
        case 'looks_think':
            return `think ${i('MESSAGE')}`;
        case 'looks_switchcostumeto':
            return `switch costume to ${i('COSTUME')}`;
        case 'looks_nextcostume':
            return 'next costume';
        case 'looks_switchbackdropto':
            return `switch backdrop to ${i('BACKDROP')}`;
        case 'looks_nextbackdrop':
            return `next backdrop`;
        case 'looks_changesizeby':
            return `change size by ${i('CHANGE')}`;
        case 'looks_setsizeto':
            return `set size to ${i('SIZE')}%`;
        case 'looks_changeeffectby':
            return `change ${i('EFFECT')} effect by ${i('CHANGE')} :: looks`;
        case 'looks_seteffectto':
            return `set ${i('EFFECT')} effect to ${i('VALUE')} :: looks`;
        case 'looks_cleargraphiceffects':
            return 'clear graphic effects';
        case 'looks_show':
            return 'show';
        case 'looks_hide':
            return 'hide';
        case 'looks_gotofrontback':
            return `go to ${i('FRONT_BACK')} layer`;
        case 'looks_goforwardbackwardlayers':
            return `go ${i('FORWARD_BACKWARD')} ${i('NUM')} layers`;
        case 'looks_costumenumbername':
            return `(costume ${i('NUMBER_NAME')})`;
        case 'looks_backdropnumbername':
            return `(backdrop ${i('NUMBER_NAME')})`;
        case 'looks_size':
            return '(size)';
        case 'looks_hideallsprites':
            return 'hide all sprites :: looks';
        case 'looks_switchbackdroptoandwait':
            return `switch backdrop to ${i('BACKDROP')} and wait`;
        case 'looks_changestretchby':
            return `change stretch by ${i('CHANGE')} :: looks`;
        case 'looks_setstretchto':
            return `set stretch to ${i('STRETCH')} % :: looks`;

            // sound ------------------------------------------------------- //
        case 'sound_playuntildone':
            return `play sound ${i('SOUND_MENU')} until done`;
        case 'sound_play':
            return `start sound ${i('SOUND_MENU')}`;
        case 'sound_stopallsounds':
            return 'stop all sounds';
        case 'sound_changeeffectby':
            return `change ${i('EFFECT')} effect by ${i('VALUE')} :: sound`;
        case 'sound_seteffectto':
            return `set ${i('EFFECT')} effect to ${i('VALUE')} :: sound`;
        case 'sound_cleareffects':
            return 'clear sound effects';
        case 'sound_changevolumeby':
            return `change volume by ${i('VOLUME')}`;
        case 'sound_setvolumeto':
            return `set volume to ${i('VOLUME')} %`;
        case 'sound_volume':
            return '(volume)';

            // events ------------------------------------------------------ //
        case 'event_whenflagclicked':
            return 'when green flag clicked';
        case 'event_whenkeypressed':
            return `when ${i('KEY_OPTION', true)} key pressed`;
        case 'event_whenthisspriteclicked':
            return 'when this sprite clicked';
        case 'event_whenbackdropswitchesto':
            return `when backdrop switches to ${i('BACKDROP', true)}`;
        case 'event_whengreaterthan':
            return `when ${i('WHENGREATERTHANMENU')} > ${i('VALUE')}`;
        case 'event_whenbroadcastreceived':
            return `when I receive ${i('BROADCAST_OPTION', true)}`;
        case 'event_broadcast':
            return `broadcast ${i('BROADCAST_INPUT')}`;
        case 'event_broadcastandwait':
            return `broadcast ${i('BROADCAST_INPUT')} and wait`;

            // control ----------------------------------------------------- //
        case 'control_wait':
            return `wait ${i('DURATION')} seconds`;
        case 'control_repeat':
            return `repeat ${i('TIMES')}` + (i('SUBSTACK', true) || '\n') + 'end';
        case 'control_forever':
            return 'forever' + (i('SUBSTACK', true) || '\n') + 'end';
        case 'control_if':
            return `if ${i('CONDITION') || '<>'} then` + (i('SUBSTACK', true) || '\n') + 'end';
        case 'control_if_else':
            return `if ${i('CONDITION') || '<>'} then` + (i('SUBSTACK', true) || '\n') + 'else' + (i('SUBSTACK2', true) || '\n') + 'end';
        case 'control_wait_until':
            return `wait until ${i('CONDITION') || '<>'}`;
        case 'control_repeat_until':
            return `repeat until ${i('CONDITION') || '<>'}` + (i('SUBSTACK', true) || '\n') + 'end';
        case 'control_stop':
            return `stop ${i('STOP_OPTION')}`;
        case 'control_start_as_clone':
            return 'when I start as a clone';
        case 'control_create_clone_of':
            return `create clone of ${i('CLONE_OPTION')}`;
        case 'control_delete_this_clone':
            return 'delete this clone';

            // sensing ----------------------------------------------------- //
        case 'sensing_touchingobject':
            return `<touching ${i('TOUCHINGOBJECTMENU')} ?>`;
        case 'sensing_touchingcolor':
            return `<touching ${i('COLOR')} ?>`;
        case 'sensing_coloristouchingcolor':
            return `<${i('COLOR')} is touching ${i('COLOR2')} ?>`;
        case 'sensing_distanceto':
            return `(distance to ${i('DISTANCETOMENU')})`;
        case 'sensing_askandwait':
            return `ask ${i('QUESTION')} and wait`;
        case 'sensing_answer':
            return '(answer)';
        case 'sensing_keypressed':
            return `<key ${i('KEY_OPTION')} pressed?>`;
        case 'sensing_mousedown':
            return '<mouse down?>';
        case 'sensing_mousex':
            return '(mouse x)';
        case 'sensing_mousey':
            return '(mouse y)';
        case 'sensing_setdragmode':
            return `set drag mode ${i('DRAG_MODE')}`;
        case 'sensing_loudness':
            return '(loudness)';
        case 'sensing_loud':
            return '<loud? :: sensing>';
        case 'sensing_timer':
            return '(timer)';
        case 'sensing_resettimer':
            return 'reset timer';
        case 'sensing_of':
            return `(${i('PROPERTY')} of ${i('OBJECT')})`;
        case 'sensing_current':
            return `(current ${i('CURRENTMENU')})`;
        case 'sensing_dayssince2000':
            return '(days since 2000)';
        case 'sensing_username':
            return '(username)';
        case 'sensing_userid':
            return '(user id :: sensing)';

            // operators --------------------------------------------------- //
        case 'operator_add':
            return operator('+');
        case 'operator_subtract':
            return operator('-');
        case 'operator_multiply':
            return operator('*');
        case 'operator_divide':
            return operator('/');
        case 'operator_random':
            return `(pick random ${i('FROM')} to ${i('TO')})`;
        case 'operator_gt':
            return boolop('>');
        case 'operator_lt':
            return boolop('<');
        case 'operator_equals':
            return boolop('=');
        case 'operator_and':
            return boolop('and');
        case 'operator_or':
            return boolop('or');
        case 'operator_not':
            return `<not ${i('OPERAND') || '<>'}>`;
        case 'operator_join':
            return `(join ${i('STRING1')} ${i('STRING2')})`;
        case 'operator_letter_of':
            return `(letter ${i('LETTER')} of ${i('STRING')})`;
        case 'operator_length':
            return `(length of ${i('STRING')})`;
        case 'operator_contains':
            return `<${i('STRING1')} contains ${i('STRING2')} ? :: operators>`;
        case 'operator_mod':
            return operator('mod');
        case 'operator_round':
            return `(round ${i('NUM')})`;
        case 'operator_mathop':
            return `(${i('OPERATOR')} of ${i('NUM')})`;

            // data -------------------------------------------------------- //
        case 'data_variable':
            return `(${block.inputs.VARIABLE.value} :: variables)`;
        case 'data_setvariableto':
            return `set ${i('VARIABLE')} to ${i('VALUE')}`;
        case 'data_changevariableby':
            return `change ${i('VARIABLE')} by ${i('VALUE')}`;
        case 'data_showvariable':
            return `show variable ${i('VARIABLE')}`;
        case 'data_hidevariable':
            return `hide variable ${i('VARIABLE')}`;
        case 'data_listcontents':
            return `(${block.inputs.LIST.value} :: list)`;
        case 'data_addtolist':
            return `add ${i('ITEM')} to ${i('LIST')}`;
        case 'data_deleteoflist':
            return `delete ${i('INDEX')} of ${i('LIST')}`;
        case 'data_deletealloflist':
            return `delete all of ${i('LIST')}`;
        case 'data_insertatlist':
            return `insert ${i('ITEM')} at ${i('INDEX')} of ${i('LIST')}`;
        case 'data_replaceitemoflist':
            return `replace item ${i('INDEX')} of ${i('LIST')} with ${i('ITEM')}`;
        case 'data_itemoflist':
            return `(item ${i('INDEX')} of ${i('LIST')})`;
        case 'data_itemnumoflist':
            return `(item # of ${i('ITEM')} in ${i('LIST')})`;
        case 'data_lengthoflist':
            return `(length of ${i('LIST')})`;
        case 'data_listcontainsitem':
            return `<${i('LIST')} contains ${i('ITEM')} ? :: list>`;
        case 'data_showlist':
            return `show list ${i('LIST')}`;
        case 'data_hidelist':
            return `hide list ${i('LIST')}`;

            // custom blocks ----------------------------------------------- //
        case 'procedures_definition':
            const spec = block.inputs.ARGUMENTS.value.map(({ type, name }) => {
                switch (type) {
                    case 'label':
                        return name.replace(/\//g, '\\/');
                    case 'numberOrString':
                        return `(${name})`;
                    case 'boolean':
                        return `<${name}>`;
                }
            }).join(' ');
            return `define ${spec}` + (block.inputs.WARP.value ? ' // run without screen refresh' : '');
        case 'procedures_call':
            const definition = target.scripts.map(s => s.blocks[0]).find(b => b.opcode === 'procedures_definition' && b.inputs.PROCCODE.value === block.inputs.PROCCODE.value);
            if (definition) {
                let index = 0;
                return definition.inputs.ARGUMENTS.value.map(({ type, name }) => {
                    switch (type) {
                        case 'label':
                            return name.replace(/\//g, '\\/');
                        default:
                            // TODO: deal with empty boolean inputs, which can't even load yet
                            return input(block.inputs.INPUTS.value[index++], target);
                    }
                }).join(' ') + ' :: custom';
            } else {
                return `... // missing custom block definition for ${block.inputs.PROCCODE.value}`;
            }
        case 'argument_reporter_string_number':
            return `(${block.inputs.VALUE.value} :: custom-arg)`;
        case 'argument_reporter_boolean':
            return `<${block.inputs.VALUE.value} :: custom-arg>`;

            // extension: pen ---------------------------------------------- //
        case 'pen_clear':
            return 'erase all';
        case 'pen_stamp':
            return 'stamp';
        case 'pen_penDown':
            return 'pen down';
        case 'pen_penUp':
            return 'pen up';
        case 'pen_setPenColorToColor':
            return `set pen color to ${i('COLOR')}`;
        case 'pen_changePenColorParamBy':
            return `change pen ${i('COLOR_PARAM')} by ${i('VALUE')}`;
        case 'pen_setPenColorParamTo':
            return `set pen ${i('COLOR_PARAM')} to ${i('VALUE')}`;
        case 'pen_changePenSizeBy':
            return `change pen size by ${i('SIZE')}`;
        case 'pen_setPenSizeTo':
            return `set pen size to ${i('SIZE')}`;
        case 'pen_changePenShadeBy':
            return `change pen shade by ${i('SHADE')}`;
        case 'pen_setPenShadeToNumber':
            return `set pen shade to ${i('SHADE')}`;
        case 'pen_changePenHueBy':
            return `change pen color by ${i('HUE')}`;
        case 'pen_setPenHueTo':
            return `set pen hue to ${i('HUE')}`;

        default:
            return `\x1b[33m${block.opcode} (${Object.keys(block.inputs).join(', ')})\x1b[0m`;

    }
}

function blocksToScratchblocks(blocks, target) {
    return blocks.map(b => blockToScratchblocks(b, target)).join('\n');
}

function scriptToScratchblocks(script, target) {
    return blocksToScratchblocks(script.blocks, target);
}

Object.assign(module.exports, {
    scriptToScratchblocks
});