sunesimonsen@transformation/ejs
A package for rendering EJS templates.
renderTemplate
Renders an EJS template for each item in the pipeline.
const { renderTemplate } = require("@transformation/ejs");Let say we want to render stock items with a custom template. Let's start out by defining the template in a file called stocks.ejs.
<%-key%>
<% for(let { price } of items) { -%>
<%-price%>
<% } -%>Now we can render items with the template by using the renderTemplate transform.
await expect(
pipeline(
emitItems(
{ symbol: "GOOG", price: 1349 },
{ symbol: "AAPL", price: 274 },
{ symbol: "AAPL", price: 275 },
{ symbol: "GOOG", price: 1351 },
{ symbol: "AAPL", price: 279 }
),
groupBy("symbol"),
renderTemplate("stocks.ejs")
),
"to yield items",
["GOOG\n 1349\n 1351\n", "AAPL\n 274\n 275\n 279\n"]
);writeTemplate
Renders an EJS template for each item in the pipeline to a file.
const { writeTemplate } = require("@transformation/ejs");Let say we want to render stock items with a custom template. Let's start out by defining the template in a file called stocks.ejs.
<%-key%>
<% for(let { price } of items) { -%>
<%-price%>
<% } -%>No we can render items with the template by using the writeTemplate transform.
await program(
emitItems(
{ symbol: "GOOG", price: 1349 },
{ symbol: "AAPL", price: 274 },
{ symbol: "AAPL", price: 275 },
{ symbol: "GOOG", price: 1351 },
{ symbol: "AAPL", price: 279 }
),
groupBy("symbol"),
writeTemplate("stocks.ejs", ({ key }) => `stocks-${key}.txt`)
);This will create two files with the following content.
stocks-APPL.txt:
AAPL: 274
AAPL: 275
AAPL: 279stocks-GOOG.txt:
GOOG: 1349
GOOG: 1351You can of cause also just write items to one file, you just needs to make sure to aggregate the pipeline into one item first.
Here we define a template that will render a an array of stocks in a file called stocksArray.ejs.
<% for(let { symbol, price } of items) { -%>
<%-symbol%>: <%-price%>
<% } -%>await program(
emitItems(
{ symbol: "GOOG", price: 1349 },
{ symbol: "AAPL", price: 274 },
{ symbol: "AAPL", price: 275 },
{ symbol: "GOOG", price: 1351 },
{ symbol: "AAPL", price: 279 }
),
sortBy("symbol"),
toArray(),
writeTemplate("stocksArray.ejs", "stocks.txt")
);This produce the following result.
stocks.txt:
AAPL: 274
AAPL: 275
AAPL: 279
GOOG: 1349
GOOG: 1351