From 68b336a75812838dfcf0b163c898fe1dd45de9fc Mon Sep 17 00:00:00 2001
From: heck <heck@pep.foundation>
Date: Mon, 19 Apr 2021 20:26:25 +0200
Subject: [PATCH] ListManagerDummy - Add public methods list_exists() /
 member_exists()

---
 src/listmanager_dummy.cc | 70 ++++++++++++++++++++++++++++++++++++++++
 src/listmanager_dummy.hh |  6 ++--
 2 files changed, 74 insertions(+), 2 deletions(-)

diff --git a/src/listmanager_dummy.cc b/src/listmanager_dummy.cc
index 9f14016..3c66224 100644
--- a/src/listmanager_dummy.cc
+++ b/src/listmanager_dummy.cc
@@ -244,6 +244,76 @@ namespace pEp {
         return ret;
     }
 
+    bool ListManagerDummy::list_exists(const std::string& addr_list)
+    {
+        pEpLogClass("list_exists(addr_list:\"" + addr_list + "\")");
+        bool ret{ false };
+        ensure_db_initialized();
+
+        ResultSet rs;
+        int rescount = 0;
+        try {
+            string sql;
+            sql = "SELECT COUNT(address) AS rescount "
+                  "FROM lists "
+                  "WHERE address = '" +
+                  addr_list + "';";
+            rs = db.execute(sql);
+            rescount = pEpSQLite::eval_sql_count(rs, "rescount");
+        } catch (...) {
+            DBException e{ "ListManagerDummy: list_exists(addr_list:\"" + addr_list + "\")" };
+            throw_with_nested(e);
+        }
+        // Check FATAL inconsistency
+        if (rescount > 1) {
+            DBException e{ "ListManagerDummy: list_exists(addr_list:\"" + addr_list +
+                           "\") - FATAL DB CONSTRAINT ERROR: list exists more than once" };
+            throw_with_nested(e);
+        }
+
+        if (rescount == 1) {
+            ret = true;
+        }
+        return ret;
+    }
+
+    bool ListManagerDummy::member_exists(const std::string& addr_list, const std::string& addr_member)
+    {
+        pEpLogClass(
+            "member_exists(addr_list:\"" + addr_list + "\", addr_member:\"" + addr_member + "\")");
+        bool ret{ false };
+        ensure_db_initialized();
+
+        ResultSet rs;
+        int rescount = 0;
+        try {
+            string sql;
+            sql = "SELECT COUNT(address) AS rescount "
+                  "FROM member_of "
+                  "WHERE (address = '" +
+                  addr_member + "' AND list_address = '" + addr_list + "');";
+            rs = db.execute(sql);
+            rescount = pEpSQLite::eval_sql_count(rs, "rescount");
+        } catch (...) {
+            DBException e{ "member_exists(addr_list:\"" + addr_list + "\", addr_member:\"" +
+                           addr_member + "\")" };
+            throw_with_nested(e);
+        }
+        // Check FATAL inconsistency
+        if (rescount > 1) {
+            DBException e{ "member_exists(addr_list:\"" + addr_list + "\", addr_member:\"" +
+                           addr_member +
+                           "\") - FATAL DB CONSTRAINT ERROR: list exists more than once" };
+            throw_with_nested(e);
+        }
+
+        if (rescount == 1) {
+            ret = true;
+        }
+        return ret;
+    }
+
+
     // public
     ListManagerDummy::~ListManagerDummy()
     {
diff --git a/src/listmanager_dummy.hh b/src/listmanager_dummy.hh
index 7e9139d..e3fed72 100644
--- a/src/listmanager_dummy.hh
+++ b/src/listmanager_dummy.hh
@@ -21,8 +21,10 @@ namespace pEp {
         void member_remove(const std::string& addr_list, const std::string& addr_member);
         // Query
         std::vector<std::string> lists();
-        std::string moderator(const std::string& list_address);
-        std::vector<std::string> members(const std::string& list_address);
+        std::string moderator(const std::string& addr_list);
+        std::vector<std::string> members(const std::string& addr_list);
+        bool list_exists(const std::string& addr_list);
+        bool member_exists(const std::string& addr_list, const std::string& addr_member);
         // db
         void close_db();
         void delete_db();