abstract generic logic from blueprinters to blueprinters.js

The logic in the files in the 'blueprinters' folder is now _only_ the data transformation logic. Instead of taking in arguments like the sheetId, the tabName, and the sheetName, the function now takes a single argument: the list of lists that represents the raw data from the sheet.

This setup gives datasheet-server greater value, as it allows developers to only specify the transformation logic, and not worry about the other stuff that datasheet server is doing.

src/blueprinters/deeprows.js

@@ -0,0 +1,26 @@
+import R from 'ramda'
+import { fmtObj } from '../lib/util'
+
+/**
+ * Each resource item is an object with values labelled according
+ * to column names specified in the sheet's first row. If two or more
+ * column names are the same except for a different integer at the end
+ * (e.g. 'tag1', and 'tag2'), then the values of those two columns are
+ * aggregated into a list, which is the value of the prefix's key ('tag').
+ *
+ * @param  {type} data        list of lists representing sheet data.
+ * @return {type} Array       the structured data.
+ */
+export default (data) => {
+  // TODO: make these deep rows.
+  const itemLabels = data[0]
+  const fmt = fmtObj(itemLabels)
+  const output = []
+
+  data.forEach((row, idx) => {
+    if (idx === 0) return
+    output.push(fmt(row))
+  })
+
+  return output
+}