refactor(fix.sh): removed error prone code (#4157)

* refactor: removed error prone code

* prettier

---------

Co-authored-by: Daniel Gibbs <me@danielgibbs.co.uk>

lgsm/functions/fix.sh

@@ -31,101 +31,58 @@ fn_fix_msg_end() {
 	fi
 }
 
+fn_exists_fix() {
+	local short="${1:?}"
+
+	if [ "$(type -t "fix_${short}.sh")" == 'function' ]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+fn_apply_fix() {
+	local phase_message="${1:?}"
+	local short="${2:?}"
+
+	if fn_exists_fix "${short}"; then
+		"fix_${short}.sh"
+	else
+		fn_print_error_nl "${shortname} is marked to apply pre start fix but there is no fix registered"
+	fi
+}
+
+apply_pre_start_fix=(arma3 armar ark av bt bo csgo cmw dst hw ins nmrih onset rust rw sdtd sfc sof2 squad st tf2 terraria ts3 mcb mta unt vh wurm zmr)
+apply_post_install_fix=(av kf kf2 lo ro samp ut2k4 ut ut3)
+
+# validate registered fixes for safe development
+for fix in "${apply_pre_start_fix[@]}" "${apply_post_install_fix[@]}"; do
+	if ! fn_exists_fix "${fix}"; then
+		fn_print_fail_nl "fix_${fix}.sh is registered but doesn't exist. Typo or did you miss to modify core_functions.sh?"
+		exitcode 1
+		core_exit.sh
+	fi
+done
+
 # Fixes that are run on start.
 if [ "${commandname}" != "INSTALL" ] && [ -z "${fixbypass}" ]; then
 	if [ "${appid}" ]; then
 		fix_steamcmd.sh
 	fi
 
-	if [ "${shortname}" == "arma3" ]; then
-		fix_arma3.sh
-	elif [ "${shortname}" == "armar" ]; then
-		fix_armar.sh
-	elif [ "${shortname}" == "ark" ]; then
-		fix_ark.sh
-	elif [ "${shortname}" == "av" ]; then
-		fix_av.sh
-	elif [ "${shortname}" == "bt" ]; then
-		fix_bt.sh
-	elif [ "${shortname}" == "bo" ]; then
-		fix_bo.sh
-	elif [ "${shortname}" == "csgo" ]; then
-		fix_csgo.sh
-	elif [ "${shortname}" == "cmw" ]; then
-		fix_cmw.sh
-	elif [ "${shortname}" == "dst" ]; then
-		fix_dst.sh
-	elif [ "${shortname}" == "hw" ]; then
-		fix_hw.sh
-	elif [ "${shortname}" == "ins" ]; then
-		fix_ins.sh
-	elif [ "${shortname}" == "nmrih" ]; then
-		fix_nmrih.sh
-	elif [ "${shortname}" == "onset" ]; then
-		fix_onset.sh
-	elif [ "${shortname}" == "rust" ]; then
-		fix_rust.sh
-	elif [ "${shortname}" == "rw" ]; then
-		fix_rw.sh
-	elif [ "${shortname}" == "sdtd" ]; then
-		fix_sdtd.sh
-	elif [ "${shortname}" == "sfc" ]; then
-		fix_sfc.sh
-	elif [ "${shortname}" == "sof2" ]; then
-		fix_sof2.sh
-	elif [ "${shortname}" == "squad" ]; then
-		fix_squad.sh
-	elif [ "${shortname}" == "st" ]; then
-		fix_st.sh
-	elif [ "${shortname}" == "tf2" ]; then
-		fix_tf2.sh
-	elif [ "${shortname}" == "terraria" ]; then
-		fix_terraria.sh
-	elif [ "${shortname}" == "ts3" ]; then
-		fix_ts3.sh
-	elif [ "${shortname}" == "mcb" ]; then
-		fix_mcb.sh
-	elif [ "${shortname}" == "mta" ]; then
-		fix_mta.sh
-	elif [ "${shortname}" == "unt" ]; then
-		fix_unt.sh
-	elif [ "${shortname}" == "vh" ]; then
-		fix_vh.sh
-	elif [ "${shortname}" == "wurm" ]; then
-		fix_wurm.sh
-	elif [ "${shortname}" == "zmr" ]; then
-		fix_zmr.sh
+	if grep -qEe "(^|\s)${shortname}(\s|$)" <<< "${apply_pre_start_fix[@]}"; then
+		fn_apply_fix "pre start" "${shortname}"
 	fi
 fi
 
 # Fixes that are run on install only.
 if [ "${commandname}" == "INSTALL" ]; then
-	if [ "${shortname}" == "av" ] || [ "${shortname}" == "cmw" ] || [ "${shortname}" == "kf" ] || [ "${shortname}" == "kf2" ] || [ "${shortname}" == "lo" ] || [ "${shortname}" == "onset" ] || [ "${shortname}" == "ro" ] || [ "${shortname}" == "samp" ] || [ "${shortname}" == "ut2k4" ] || [ "${shortname}" == "ut" ] || [ "${shortname}" == "ut3" ]; then
+	if grep -qEe "(^|\s)${shortname}(\s|$)" <<< "${apply_post_install_fix[@]}"; then
 		echo -e ""
 		echo -e "${lightyellow}Applying Post-Install Fixes${default}"
 		echo -e "================================="
 		fn_sleep_time
 		postinstall=1
-		if [ "${shortname}" == "av" ]; then
-			fix_av.sh
-		elif [ "${shortname}" == "kf" ]; then
-			fix_kf.sh
-		elif [ "${shortname}" == "kf2" ]; then
-			fix_kf2.sh
-		elif [ "${shortname}" == "lo" ]; then
-			fix_lo.sh
-		elif [ "${shortname}" == "ro" ]; then
-			fix_ro.sh
-		elif [ "${shortname}" == "samp" ]; then
-			fix_samp.sh
-		elif [ "${shortname}" == "ut2k4" ]; then
-			fix_ut2k4.sh
-		elif [ "${shortname}" == "ut" ]; then
-			fix_ut.sh
-		elif [ "${shortname}" == "ut3" ]; then
-			fix_ut3.sh
-		else
-			fn_print_information_nl "No fixes required."
-		fi
+		fn_apply_fix "post install" "${shortname}"
 	fi
 fi