From a1613758e4b8cdc6a4a7182033bf2ce39ad5ec06 Mon Sep 17 00:00:00 2001
From: Pierre HUBERT <pierre.git@communiquons.org>
Date: Sat, 21 Mar 2020 08:57:51 +0100
Subject: [PATCH] Can delete information associated to a post

---
 src/entities/Post.ts        |  4 +++
 src/helpers/PostsHelper.ts  | 15 +++++++++-
 src/helpers/SurveyHelper.ts | 55 +++++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/src/entities/Post.ts b/src/entities/Post.ts
index 451ecdb..207b3ee 100644
--- a/src/entities/Post.ts
+++ b/src/entities/Post.ts
@@ -73,6 +73,10 @@ export class PostFile implements PostFileBuilder {
 	get url() : string {
 		return pathUserData(this.path)
 	}
+
+	get sysPath() : string {
+		return pathUserData(this.path, true);
+	}
 }
 
 export interface PostLinkBuilder {
diff --git a/src/helpers/PostsHelper.ts b/src/helpers/PostsHelper.ts
index 22bb247..26b7c0f 100644
--- a/src/helpers/PostsHelper.ts
+++ b/src/helpers/PostsHelper.ts
@@ -7,6 +7,8 @@ import { GroupMembershipLevels } from "../entities/GroupMember";
 import { mysql_date } from "../utils/DateUtils";
 import { LikesHelper, LikesType } from "./LikesHelper";
 import { CommentsHelper } from "./CommentsHelper";
+import { existsSync, unlinkSync } from "fs";
+import { SurveyHelper } from "./SurveyHelper";
 
 /**
  * Posts helper
@@ -493,7 +495,18 @@ export class PostsHelper {
 		// Delete all the comments associated to the post
 		await CommentsHelper.DeleteAll(postID);
 
-		// TODO : continue deletion
+		// Delete associated file (if any)
+		if(post.kind == PostKind.POST_KIND_IMAGE
+			|| post.kind == PostKind.POST_KIND_PDF) {
+			if(existsSync(post.file.sysPath))
+				unlinkSync(post.file.sysPath);
+		}
+
+		// Delete associated survey (if any)
+		if(post.kind == PostKind.POST_KIND_SURVEY) {
+			if(await SurveyHelper.Exists(postID))
+				await SurveyHelper.Delete(postID);
+		}
 	}
 
 	/**
diff --git a/src/helpers/SurveyHelper.ts b/src/helpers/SurveyHelper.ts
index 38b7886..03b2739 100644
--- a/src/helpers/SurveyHelper.ts
+++ b/src/helpers/SurveyHelper.ts
@@ -54,6 +54,61 @@ export class SurveyHelper {
 		}
 	}
 
+	/**
+	 * Check out whether a survey is associated to a post or not
+	 * 
+	 * @param postID Target post ID
+	 */
+	public static async Exists(postID: number) : Promise<boolean> {
+		return await DatabaseHelper.Count({
+			table: SURVEY_INFO_TABLE,
+			where: {
+				ID_texte: postID
+			}
+		}) > 0
+	}
+
+	/**
+	 * Get the ID of the survey associated with a post
+	 * 
+	 * @param postID Target post ID
+	 */
+	private static async GetID(postID: number) : Promise<number> {
+		const info = await DatabaseHelper.QueryRow({
+			table: SURVEY_INFO_TABLE,
+			where: {
+				ID_texte: postID
+			},
+			fields: ["ID"]
+		});
+
+		if(info == null)
+			throw new Error("Survey for post " + postID + " not found!");
+		
+		return info.ID;
+	}
+
+	/**
+	 * Delete the survey associated to a post
+	 * 
+	 * @param postID Target post ID
+	 */
+	public static async Delete(postID: number) {
+		const surveyID = await this.GetID(postID);
+		
+		DatabaseHelper.DeleteRows(SURVEY_RESPONSE_TABLE, {
+			ID_sondage: surveyID
+		});
+
+		DatabaseHelper.DeleteRows(SURVEY_CHOICES_TABLE, {
+			ID_sondage: surveyID
+		});
+
+		DatabaseHelper.DeleteRows(SURVEY_INFO_TABLE, {
+			ID: surveyID
+		});
+	}
+
 	/**
 	 * Get information about the survey of a post
 	 *