Add initial version of dijkstra backend cloudron image

node_modules/knex/lib/dialects/sqlite3/query/compiler.js

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+// SQLite3 Query Builder & Compiler
+
+const inherits = require('inherits');
+const QueryCompiler = require('../../../query/compiler');
+const {
+  assign,
+  each,
+  isEmpty,
+  isString,
+  noop,
+  reduce,
+  identity,
+} = require('lodash');
+
+function QueryCompiler_SQLite3(client, builder) {
+  QueryCompiler.call(this, client, builder);
+
+  const { returning } = this.single;
+
+  if (returning) {
+    this.client.logger.warn(
+      '.returning() is not supported by sqlite3 and will not have any effect.'
+    );
+  }
+}
+
+inherits(QueryCompiler_SQLite3, QueryCompiler);
+
+assign(QueryCompiler_SQLite3.prototype, {
+  // The locks are not applicable in SQLite3
+  forShare: emptyStr,
+
+  forUpdate: emptyStr,
+
+  // SQLite requires us to build the multi-row insert as a listing of select with
+  // unions joining them together. So we'll build out this list of columns and
+  // then join them all together with select unions to complete the queries.
+  insert() {
+    const insertValues = this.single.insert || [];
+    let sql = this.with() + `insert into ${this.tableName} `;
+
+    if (Array.isArray(insertValues)) {
+      if (insertValues.length === 0) {
+        return '';
+      } else if (
+        insertValues.length === 1 &&
+        insertValues[0] &&
+        isEmpty(insertValues[0])
+      ) {
+        return sql + this._emptyInsertValue;
+      }
+    } else if (typeof insertValues === 'object' && isEmpty(insertValues)) {
+      return sql + this._emptyInsertValue;
+    }
+
+    const insertData = this._prepInsert(insertValues);
+
+    if (isString(insertData)) {
+      return sql + insertData;
+    }
+
+    if (insertData.columns.length === 0) {
+      return '';
+    }
+
+    sql += `(${this.formatter.columnize(insertData.columns)})`;
+
+    // backwards compatible error
+    if (this.client.valueForUndefined !== null) {
+      each(insertData.values, (bindings) => {
+        each(bindings, (binding) => {
+          if (binding === undefined)
+            throw new TypeError(
+              '`sqlite` does not support inserting default values. Specify ' +
+                'values explicitly or use the `useNullAsDefault` config flag. ' +
+                '(see docs http://knexjs.org/#Builder-insert).'
+            );
+        });
+      });
+    }
+
+    if (insertData.values.length === 1) {
+      const parameters = this.formatter.parameterize(
+        insertData.values[0],
+        this.client.valueForUndefined
+      );
+      return sql + ` values (${parameters})`;
+    }
+
+    const blocks = [];
+    let i = -1;
+    while (++i < insertData.values.length) {
+      let i2 = -1;
+      const block = (blocks[i] = []);
+      let current = insertData.values[i];
+      current = current === undefined ? this.client.valueForUndefined : current;
+      while (++i2 < insertData.columns.length) {
+        block.push(
+          this.formatter.alias(
+            this.formatter.parameter(current[i2]),
+            this.formatter.wrap(insertData.columns[i2])
+          )
+        );
+      }
+      blocks[i] = block.join(', ');
+    }
+    return sql + ' select ' + blocks.join(' union all select ');
+  },
+
+  // Compile a truncate table statement into SQL.
+  truncate() {
+    const { table } = this.single;
+    return {
+      sql: `delete from ${this.tableName}`,
+      output() {
+        return this.query({
+          sql: `delete from sqlite_sequence where name = '${table}'`,
+        }).catch(noop);
+      },
+    };
+  },
+
+  // Compiles a `columnInfo` query
+  columnInfo() {
+    const column = this.single.columnInfo;
+
+    // The user may have specified a custom wrapIdentifier function in the config. We
+    // need to run the identifiers through that function, but not format them as
+    // identifiers otherwise.
+    const table = this.client.customWrapIdentifier(this.single.table, identity);
+
+    return {
+      sql: `PRAGMA table_info(\`${table}\`)`,
+      output(resp) {
+        const maxLengthRegex = /.*\((\d+)\)/;
+        const out = reduce(
+          resp,
+          function(columns, val) {
+            let { type } = val;
+            let maxLength = type.match(maxLengthRegex);
+            if (maxLength) {
+              maxLength = maxLength[1];
+            }
+            type = maxLength ? type.split('(')[0] : type;
+            columns[val.name] = {
+              type: type.toLowerCase(),
+              maxLength,
+              nullable: !val.notnull,
+              defaultValue: val.dflt_value,
+            };
+            return columns;
+          },
+          {}
+        );
+        return (column && out[column]) || out;
+      },
+    };
+  },
+
+  limit() {
+    const noLimit = !this.single.limit && this.single.limit !== 0;
+    if (noLimit && !this.single.offset) return '';
+
+    // Workaround for offset only,
+    // see http://stackoverflow.com/questions/10491492/sqllite-with-skip-offset-only-not-limit
+    return `limit ${this.formatter.parameter(
+      noLimit ? -1 : this.single.limit
+    )}`;
+  },
+});
+
+function emptyStr() {
+  return '';
+}
+
+module.exports = QueryCompiler_SQLite3;