From 858d778039a2ac19cbd34e9cc987b8526a1df463 Mon Sep 17 00:00:00 2001
From: Timo Hocker <t-hocker@web.de>
Date: Sat, 18 Apr 2020 20:43:02 +0200
Subject: [PATCH] database structure

---
 lib/snippets/database/classes/Column.ts       | 13 ++++++++++
 lib/snippets/database/classes/ColumnType.ts   | 20 ++++++++++++++
 lib/snippets/database/classes/Database.ts     |  5 ++++
 lib/snippets/database/classes/PatchActions.ts | 15 +++++++++++
 lib/snippets/database/classes/Relation.ts     |  9 +++++++
 lib/snippets/database/classes/Serializable.ts |  3 +++
 lib/snippets/database/classes/Table.ts        | 10 +++++++
 lib/snippets/database/index.ts                |  7 +++++
 .../database/patch_actions/RenameColumn.ts    | 26 +++++++++++++++++++
 9 files changed, 108 insertions(+)
 create mode 100644 lib/snippets/database/classes/Column.ts
 create mode 100644 lib/snippets/database/classes/ColumnType.ts
 create mode 100644 lib/snippets/database/classes/Database.ts
 create mode 100644 lib/snippets/database/classes/PatchActions.ts
 create mode 100644 lib/snippets/database/classes/Relation.ts
 create mode 100644 lib/snippets/database/classes/Serializable.ts
 create mode 100644 lib/snippets/database/classes/Table.ts
 create mode 100644 lib/snippets/database/index.ts
 create mode 100644 lib/snippets/database/patch_actions/RenameColumn.ts

diff --git a/lib/snippets/database/classes/Column.ts b/lib/snippets/database/classes/Column.ts
new file mode 100644
index 0000000..78e01e5
--- /dev/null
+++ b/lib/snippets/database/classes/Column.ts
@@ -0,0 +1,13 @@
+import { ColumnType } from './ColumnType';
+import { Relation } from './Relation';
+
+export class Column {
+  public name: string;
+  public type: ColumnType;
+  public relation?: Relation;
+
+  public constructor (name: string, type: ColumnType) {
+    this.name = name;
+    this.type = type;
+  }
+}
diff --git a/lib/snippets/database/classes/ColumnType.ts b/lib/snippets/database/classes/ColumnType.ts
new file mode 100644
index 0000000..4ecc8c1
--- /dev/null
+++ b/lib/snippets/database/classes/ColumnType.ts
@@ -0,0 +1,20 @@
+export enum ColumnType {
+  string = 'string',
+  text = 'text',
+  integer = 'integer',
+  big_integer = 'bigInteger',
+  float = 'float',
+  decimal = 'decimal',
+  increments = 'increments',
+  big_increments = 'bigIncrements',
+  boolean = 'boolean',
+  date = 'date',
+  date_time ='datetime',
+  time = 'time',
+  timestamp = 'timestamp',
+  binary = 'binary',
+  enum = 'enu',
+  json='json',
+  jsonb='jsonb',
+  uuid='uuid'
+}
diff --git a/lib/snippets/database/classes/Database.ts b/lib/snippets/database/classes/Database.ts
new file mode 100644
index 0000000..254447e
--- /dev/null
+++ b/lib/snippets/database/classes/Database.ts
@@ -0,0 +1,5 @@
+import { Table } from './Table';
+
+export class Database {
+  public tables: Array<Table> = [];
+}
diff --git a/lib/snippets/database/classes/PatchActions.ts b/lib/snippets/database/classes/PatchActions.ts
new file mode 100644
index 0000000..0f52c6f
--- /dev/null
+++ b/lib/snippets/database/classes/PatchActions.ts
@@ -0,0 +1,15 @@
+export enum PatchActions {
+  rename_column = 'rc',
+  add_column = 'ac',
+  drop_column = 'dc',
+  add_relation = 'ar',
+  drop_relation = 'dr',
+  set_column_type = 'tc',
+  add_table = 'at',
+  drop_table = 'dt',
+  rename_table = 'rt',
+  insert_data = 'id',
+  update_data = 'ud',
+  mutate_data = 'md',
+  delete_data = 'dd'
+}
diff --git a/lib/snippets/database/classes/Relation.ts b/lib/snippets/database/classes/Relation.ts
new file mode 100644
index 0000000..89cb134
--- /dev/null
+++ b/lib/snippets/database/classes/Relation.ts
@@ -0,0 +1,9 @@
+export class Relation {
+  public column: string;
+  public table: string;
+
+  public constructor (table: string, column: string) {
+    this.column = column;
+    this.table = table;
+  }
+}
diff --git a/lib/snippets/database/classes/Serializable.ts b/lib/snippets/database/classes/Serializable.ts
new file mode 100644
index 0000000..7d5a8d3
--- /dev/null
+++ b/lib/snippets/database/classes/Serializable.ts
@@ -0,0 +1,3 @@
+export interface Serializable {
+  serialize(): string;
+}
diff --git a/lib/snippets/database/classes/Table.ts b/lib/snippets/database/classes/Table.ts
new file mode 100644
index 0000000..d05cfaa
--- /dev/null
+++ b/lib/snippets/database/classes/Table.ts
@@ -0,0 +1,10 @@
+import { Column } from './Column';
+
+export class Table {
+  public name: string;
+  public columns: Array<Column> = [];
+
+  public constructor (name: string) {
+    this.name = name;
+  }
+}
diff --git a/lib/snippets/database/index.ts b/lib/snippets/database/index.ts
new file mode 100644
index 0000000..91e2110
--- /dev/null
+++ b/lib/snippets/database/index.ts
@@ -0,0 +1,7 @@
+import { Snippet } from '../../Snippet';
+
+export default class Database implements Snippet {
+  public start (): Promise<void> {
+    // noop
+  }
+}
diff --git a/lib/snippets/database/patch_actions/RenameColumn.ts b/lib/snippets/database/patch_actions/RenameColumn.ts
new file mode 100644
index 0000000..09e4a50
--- /dev/null
+++ b/lib/snippets/database/patch_actions/RenameColumn.ts
@@ -0,0 +1,26 @@
+import { Serializable } from '../classes/Serializable';
+
+export class RenameColumn implements Serializable {
+  public column: string;
+  public new_name: string;
+
+  public constructor (column: string, new_name = null) {
+    if (new_name === null) {
+      const regex = /(?<column>[a-z_]+) (?<new_name>[a-z_]+)/iu;
+      const res = regex.exec (column);
+      if (res === null || typeof res.groups === 'undefined')
+        throw new Error ('invalid string to deserialize');
+
+      this.column = res.groups.column;
+      this.new_name = res.groups.new_name;
+      return;
+    }
+
+    this.column = column;
+    this.new_name = new_name as unknown as string;
+  }
+
+  public serialize (): string {
+    return `${this.column} ${this.new_name}`;
+  }
+}