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// space.js, a full (not sparse data storage object) with some utilities.
// This includes from/to fetch, write, files, and ad-hoc strings. [DONE] [DONE] [DONE] [DONE] [DONE]
// It provides combination between Spaces. [DONE]
// It also gives a search utility and a utility to grab an arbitrary section [DONE] [DONE]
const fs = require('fs')
const vec = require('./utils/vec');
function chop(string, n){ // chops a string into n-sized chunks. Assumed to be perfect multiple
let arr = [];
for (let sec = 0; sec < string.length; sec++){
arr.push(string.slice(sec*n,(sec+1)*n));
}
return arr;
}
function replace(text, old, repl){ //replaces, in an array `text`, the instances of `old` with `repl`
for (let i=0; i<text.length; i++){
if (text[i] == old) text[i] = repl;
}
return text;
}
function Space(){
this.data = [];
this.loc = []; // Coordinates to represent topleft location of spaces, and aid with .comb
this.fromfetch = function(tiles, dimension, conform=true){ //tiles is straight from fetch/tileUpdate function, dimension is a min/max pair of y/x coordinates; conform is false for tileUpdate because the cell_props don't actually mean anything; all data is still included
this.loc = vec.tileToChar(dimension[0]);
for (let y=dimension[0][0]; y<=dimension[1][0]; y++){
for (let line=0; line<8; line++)
this.data.push([]); // Adds lines
for (let x=dimension[0][1]; x<=dimension[1][1]; x++){
if (! tiles[[y,x]]) tilein({"content":' '.repeat(16*8),"properties":{"cell_props":{}}}); // Insert a null tile if server sends null
else tilein.call(this, tiles[[y,x]], y-dimension[0][0]);
}
}
function tilein(tile, tilerow){ //tile is one of the tiles from `tiles`, and tilerow is y-dimension[0]; helper function
let incl = Object.keys(tile.properties.cell_props).map(linenum => parseInt(linenum)) // list of included lines in the content
let cont = chop(tile.content,16);
let read = 0; //line of cont to read
for (let line=0; line<8; line++){
curline = line+8*tilerow;
if (conform && incl.includes(line)){
for (let i=0; i<16; i++) this.data[curline].push(' ');
} else {
Array.prototype.push.apply(this.data[curline],cont[read].split(''));
read++;
}
}
}
}
this.towrite = function(){ // Does no splitting or anything like that. Just returns a list of triplets for the write function
let writes = [];
for (let line = 0; line < this.data.length; line++) for (let chr = 0; chr < this.data[line].length; chr++){
if (this.data[line][chr] == '') continue; // Internal coding for "do not write"
writes.push([[this.loc[0]+line, this.loc[1]+chr],this.data[line][chr]]);
}
return writes;
}
this.tofile = function(filename){
fs.writeFileSync(filename, this.print());
};
this.print = function(){
return this.data.map(row => replace(replace(replace(row,'&','\\&'),'\\','\\\\'),'','&').join('')).join('\n');
}
this.fromfile = function(filename){ //Reads an external file into internal data
this.adhoc(fs.readFileSync(filename,'utf8'));
}
this.adhoc = function(text){
text = text.split('\n')
text = text.map(row => row.split(''));
this.data = text.map(row => {
for (let i = 0; i<row.length; i++){
if (row[i] == '\\') row.splice(i,1);
else if (row[i] == '&') row[i] = '';
}
return row;
});
}
this.comb = function(other, func){ // other must have a valid .loc. If this.loc null, treated as offset
if (! other.loc) throw "The secondary space must have a valid .loc"
if (this.loc.length == 0) {
offset = [0, 0];
this.loc = other.loc;
} else {
offset = vec.sub(this.loc, other.loc);
if (this.data.length > 0)
this.loc = vec.elem(this.loc, other.loc, (a,b) => Math.min(a,b));
} // offset is position of other relative to this, so these are mainly definitional.
// Convert negative offsets of either sort into zero offsets with significant previous whitespace (translation)
for (let i = 0; i < -offset[0]; i++) this.data.unshift([]);
if (offset[0] < 0) offset[0] = 0;
for (let row = 0; row < this.data.length; row++){ // offset[1] < 0 fix
for (let i = 0; i < -offset[1]; i++) this.data[row].unshift('');
}
if (offset[1] < 0) offset[1] = 0;
// Iterate over other.data and add to this.data
while (this.data.length < offset[0]+other.data.length) this.data.push([]); // Row padding
for (let row = 0; row < other.data.length; row++){
let thisrow = this.data[row+offset[0]];
while (thisrow.length < offset[1]+other.data[row].length) thisrow.push(''); // Character-wise padding
for (let chr = 0; chr < other.data[row].length; chr++){
let thechr = chr+offset[1];
thisrow[thechr] = func(thisrow[thechr], other.data[row][chr]);
}
}
}
this.search = function(other){ //Returns first instance of `other` subspace (prioritized vertically then horizontally)
// Non-standard exclusion of this.loc
let loc = [];
for (let line=0; line<=this.data.length-other.data.length; line++){ for (let chr=0; chr<=this.data[line].length-other.data[0].length; chr++){
var match = true;
for (let y=0; y<other.data.length; y++) for (let x=0; x<other.data[y].length; x++){
if (this.data[line+y][chr+x] != other.data[y][x]){
match = false;
break;
}
}
if (match){
loc = [line,chr];
break;
}
} if (match) break;}
return loc;
}
this.subsection = function(range){ // range is a coordinate pair
// Similarly excludes this.loc
newspace = new Space();
for (let line=range[0][0]; line<=range[1][0]; line++){
newspace.data.push([]);
for (let chr=range[0][1]; chr<=range[1][1]; chr++){
newspace.data[line-range[0][0]].push(this.data[line][chr] || '');
}
}
return newspace;
}
}
module.exports = Space
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