forked from sheetjs/sheetjs
79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
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/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
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/* eslint-env node */
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var XLSX = require("xlsx");
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async function book_append_knex(wb, knex, tbl) {
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const aoo = await knex.select("*").from(tbl);
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XLSX.utils.book_append_sheet(wb, XLSX.utils.json_to_sheet(aoo), tbl);
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}
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const TYPES = {
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b: "boolean",
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n: "float",
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t: "string",
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d: "dateTime"
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};
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async function ws_to_knex(ws, knex, n) {
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if(!ws || !ws['!ref']) return;
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var range = XLSX.utils.decode_range(ws['!ref']);
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if(!range || !range.s || !range.e || range.s > range.e) return;
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var R = range.s.r, C = range.s.c;
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var names = new Array(range.e.c-range.s.c+1);
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for(C = range.s.c; C<= range.e.c; ++C){
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var addr = XLSX.utils.encode_cell({c:C,r:R});
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names[C-range.s.c] = ws[addr] ? ws[addr].v : XLSX.utils.encode_col(C);
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}
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for(var i = 0; i < names.length; ++i) if(names.indexOf(names[i]) < i)
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for(var j = 0; j < names.length; ++j) {
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var _name = names[i] + "_" + (j+1);
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if(names.indexOf(_name) > -1) continue;
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names[i] = _name;
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}
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var types = new Array(range.e.c-range.s.c+1);
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for(C = range.s.c; C<= range.e.c; ++C) {
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var seen = {}, _type = "";
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for(R = range.s.r+1; R<= range.e.r; ++R)
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seen[(ws[XLSX.utils.encode_cell({c:C,r:R})]||{t:"z"}).t] = true;
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if(seen.s || seen.str) _type = TYPES.t;
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else if(seen.n + seen.b + seen.d + seen.e > 1) _type = TYPES.t;
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else switch(true) {
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case seen.b: _type = TYPES.b; break;
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case seen.n: _type = TYPES.n; break;
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case seen.e: _type = TYPES.t; break;
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case seen.d: _type = TYPES.d; break;
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}
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types[C-range.s.c] = _type || TYPES.t;
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}
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await knex.schema.dropTableIfExists(n);
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await knex.schema.createTable(n, (table) => { names.forEach((n, i) => { table[types[i] || "text"](n); }); });
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for(R = range.s.r+1; R<= range.e.r; ++R) {
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var row = {};
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for(C = range.s.c; C<= range.e.c; ++C) {
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var cell = ws[XLSX.utils.encode_cell({c:C,r:R})];
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if(!cell) continue;
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var key = names[C-range.s.c], val = cell.v;
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if(types[C-range.s.c] == TYPES.n) if(cell.t == 'b' || typeof val == 'boolean' ) val = +val;
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row[key] = val;
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}
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await knex.insert(row).into(n);;
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}
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}
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async function wb_to_knex(wb, knex) {
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for(var i = 0; i < wb.SheetNames.length; ++i) {
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var n = wb.SheetNames[i];
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var ws = wb.Sheets[n];
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await ws_to_knex(ws, knex, n);
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}
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}
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module.exports = {
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book_append_knex,
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wb_to_knex
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};
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