Initial commit

node_modules/postgres-array/index.js

@@ -0,0 +1,89 @@
+'use strict'
+
+exports.parse = function (source, transform) {
+  return parsePostgresArray(source, transform)
+}
+
+function parsePostgresArray (source, transform, nested = false) {
+  let character = ''
+  let quote = false
+  let position = 0
+  let dimension = 0
+  const entries = []
+  let recorded = ''
+
+  const newEntry = function (includeEmpty) {
+    let entry = recorded
+
+    if (entry.length > 0 || includeEmpty) {
+      if (entry === 'NULL' && !includeEmpty) {
+        entry = null
+      }
+
+      if (entry !== null && transform) {
+        entry = transform(entry)
+      }
+
+      entries.push(entry)
+      recorded = ''
+    }
+  }
+
+  if (source[0] === '[') {
+    while (position < source.length) {
+      const char = source[position++]
+
+      if (char === '=') { break }
+    }
+  }
+
+  while (position < source.length) {
+    let escaped = false
+    character = source[position++]
+
+    if (character === '\\') {
+      character = source[position++]
+      escaped = true
+    }
+
+    if (character === '{' && !quote) {
+      dimension++
+
+      if (dimension > 1) {
+        const parser = parsePostgresArray(source.substr(position - 1), transform, true)
+
+        entries.push(parser.entries)
+        position += parser.position - 2
+      }
+    } else if (character === '}' && !quote) {
+      dimension--
+
+      if (!dimension) {
+        newEntry()
+
+        if (nested) {
+          return {
+            entries,
+            position
+          }
+        }
+      }
+    } else if (character === '"' && !escaped) {
+      if (quote) {
+        newEntry(true)
+      }
+
+      quote = !quote
+    } else if (character === ',' && !quote) {
+      newEntry()
+    } else {
+      recorded += character
+    }
+  }
+
+  if (dimension !== 0) {
+    throw new Error('array dimension not balanced')
+  }
+
+  return entries
+}