code completion

packages/web/src/query/analyseQuerySources.ts

@@ -0,0 +1,38 @@
+export default function analyseQuerySources(sql, sourceNames) {
+  const upperSourceNames = sourceNames.map(x => x.toUpperCase());
+  const tokens = sql.split(/\s+/);
+  const res = [];
+  for (let i = 0; i < tokens.length; i += 1) {
+    const lastWordMatch = tokens[i].match(/([^.]+)$/);
+    if (lastWordMatch) {
+      const word = lastWordMatch[1];
+      const wordUpper = word.toUpperCase();
+      if (upperSourceNames.includes(wordUpper)) {
+        const preWord = tokens[i - 1];
+        if (preWord && /^((join)|(from)|(update)|(delete)|(insert))$/i.test(preWord)) {
+          let postWord = tokens[i + 1];
+          if (postWord && /^as$/i.test(postWord)) {
+            postWord = tokens[i + 2];
+          }
+          if (!postWord) {
+            res.push({
+              name: word,
+            });
+          } else if (
+            /^((where)|(inner)|(left)|(right)|(on)|(join))$/i.test(postWord) ||
+            !/^[a-zA-Z][a-zA-Z0-9]*$/i.test(postWord)
+          ) {
+            res.push({
+              name: word,
+            });
+          } else
+            res.push({
+              name: word,
+              alias: postWord,
+            });
+        }
+      }
+    }
+  }
+  return res;
+}