more mirroe archive commands

packages/api/src/shell/changeSetOverJsonLinesReader.js

@@ -1,69 +0,0 @@
-const fs = require('fs');
-const stream = require('stream');
-const byline = require('byline');
-const { getLogger } = require('dbgate-tools');
-const logger = getLogger('changeSetOverJsonLinesReader');
-
-class ParseStream extends stream.Transform {
-  constructor({ limitRows, changeSet }) {
-    super({ objectMode: true });
-    this.limitRows = limitRows;
-    this.changeSet = changeSet;
-    this.currentRowIndex = 0;
-  }
-  _transform(chunk, encoding, done) {
-    let obj = JSON.parse(chunk);
-    if (obj.__isStreamHeader) {
-      this.push(obj);
-      done();
-      return;
-    }
-
-    if (!this.limitRows || this.currentRowIndex < this.limitRows) {
-      if (this.changeSet.deletes.find(x => x.existingRowIndex == this.currentRowIndex)) {
-        obj = null;
-      }
-
-      const update = this.changeSet.updates.find(x => x.existingRowIndex == this.currentRowIndex);
-      if (update) {
-        obj = {
-          ...obj,
-          ...update.fields,
-        };
-      }
-
-      if (obj) {
-        this.push(obj);
-      }
-      this.currentRowIndex += 1;
-    }
-    done();
-  }
-
-  _flush(done) {
-    for (const insert of this.changeSet.inserts) {
-      this.push({
-        ...insert.document,
-        ...insert.fields,
-      });
-    }
-    done();
-  }
-}
-
-async function changeSetOverJsonLinesReader({
-  fileName,
-  encoding = 'utf-8',
-  limitRows = undefined,
-  changeSet = { inserts: [], updates: [], deletes: [] },
-}) {
-  logger.info(`Reading file ${fileName} with change set`);
-
-  const fileStream = fs.createReadStream(fileName, encoding);
-  const liner = byline(fileStream);
-  const parser = new ParseStream({ limitRows, changeSet });
-  liner.pipe(parser);
-  return parser;
-}
-
-module.exports = changeSetOverJsonLinesReader;

packages/api/src/shell/index.js

@@ -25,7 +25,7 @@ const dumpDatabase = require('./dumpDatabase');
 const importDatabase = require('./importDatabase');
 const loadDatabase = require('./loadDatabase');
 const generateModelSql = require('./generateModelSql');
-const changeSetOverJsonLinesReader = require('./changeSetOverJsonLinesReader');
+const modifyJsonLinesReader = require('./modifyJsonLinesReader');
 
 const dbgateApi = {
   queryReader,
@@ -54,7 +54,7 @@ const dbgateApi = {
   importDatabase,
   loadDatabase,
   generateModelSql,
-  changeSetOverJsonLinesReader,
+  modifyJsonLinesReader,
 };
 
 requirePlugin.initializeDbgateApi(dbgateApi);

packages/api/src/shell/modifyJsonLinesReader.js

@@ -0,0 +1,117 @@
+const fs = require('fs');
+const _ = require('lodash');
+const stream = require('stream');
+const byline = require('byline');
+const { getLogger } = require('dbgate-tools');
+const logger = getLogger('modifyJsonLinesReader');
+const stableStringify = require('json-stable-stringify');
+
+class ParseStream extends stream.Transform {
+  constructor({ limitRows, changeSet, mergedRows, mergeKey, mergeMode }) {
+    super({ objectMode: true });
+    this.limitRows = limitRows;
+    this.changeSet = changeSet;
+    this.currentRowIndex = 0;
+    if (mergeMode == 'merge') {
+      if (mergedRows && mergeKey) {
+        this.mergedRowsDict = {};
+        for (const row of mergedRows) {
+          const key = stableStringify(_.pick(row, mergeKey));
+          this.mergedRowsDict[key] = row;
+        }
+      }
+    }
+    this.mergedRowsArray = mergedRows;
+    this.mergeKey = mergeKey;
+    this.mergeMode = mergeMode;
+  }
+  _transform(chunk, encoding, done) {
+    let obj = JSON.parse(chunk);
+    if (obj.__isStreamHeader) {
+      this.push(obj);
+      done();
+      return;
+    }
+
+    if (this.changeSet) {
+      if (!this.limitRows || this.currentRowIndex < this.limitRows) {
+        if (this.changeSet.deletes.find(x => x.existingRowIndex == this.currentRowIndex)) {
+          obj = null;
+        }
+
+        const update = this.changeSet.updates.find(x => x.existingRowIndex == this.currentRowIndex);
+        if (update) {
+          obj = {
+            ...obj,
+            ...update.fields,
+          };
+        }
+
+        if (obj) {
+          this.push(obj);
+        }
+        this.currentRowIndex += 1;
+      }
+    } else if (this.mergedRowsArray && this.mergeKey && this.mergeMode) {
+      if (this.mergeMode == 'merge') {
+        const key = stableStringify(_.pick(obj, this.mergeKey));
+        if (this.mergedRowsDict[key]) {
+          this.push({ ...obj, ...this.mergedRowsDict[key] });
+          delete this.mergedRowsDict[key];
+        } else {
+          this.push(obj);
+        }
+      } else if (this.mergeMode == 'append') {
+        this.push(obj);
+      }
+    } else {
+      this.push(obj);
+    }
+    done();
+  }
+
+  _flush(done) {
+    if (this.changeSet) {
+      for (const insert of this.changeSet.inserts) {
+        this.push({
+          ...insert.document,
+          ...insert.fields,
+        });
+      }
+    } else if (this.mergedRowsArray && this.mergeKey) {
+      if (this.mergeMode == 'merge') {
+        for (const row of this.mergedRowsArray) {
+          const key = stableStringify(_.pick(row, this.mergeKey));
+          if (this.mergedRowsDict[key]) {
+            this.push(row);
+          }
+        }
+      } else {
+        for (const row of this.mergedRowsArray) {
+          this.push(row);
+        }
+      }
+    }
+    done();
+  }
+}
+
+async function modifyJsonLinesReader({
+  fileName,
+  encoding = 'utf-8',
+  limitRows = undefined,
+  changeSet = null,
+  mergedRows = null,
+  mergeKey = null,
+  mergeMode = 'merge',
+}) {
+  logger.info(`Reading file ${fileName} with change set`);
+
+  const fileStream = fs.createReadStream(fileName, encoding);
+  const liner = byline(fileStream);
+  const parser = new ParseStream({ limitRows, changeSet, mergedRows, mergeKey, mergeMode });
+  liner.pipe(parser);
+  return parser;
+}
+
+module.exports = modifyJsonLinesReader;