Sequence Incap Crawl

#include <sourcemod>
#include <sdktools>
#include <l4d2tools>

public Plugin:myinfo =
{
    name = "[L4D2] Incap Crawling",
    author = "DeathChaos25",
    description = "",
    version = "",
    url = ""
}

public OnPluginStart()
{
    SetConVarInt(FindConVar("survivor_allow_crawling"), 1);
    SetConVarInt(FindConVar("survivor_crawl_speed"), 35);
}

public Action:L4D2_OnSelectSequence(client, &sequence)
{
    if (IsSurvivor(client) && IsPlayerAlive(client) && !IsPlayerHeld(client)
         && GetEntProp(client, Prop_Send, "m_isHangingFromLedge") != 1
         && GetEntProp(client, Prop_Send, "m_reviveOwner") == -1 && IsIncapacitated(client))
    {
        new crawl = GetCrawlSequence(client);
        new buttons = GetClientButtons(client);
        if (crawl != -1 && buttons & IN_FORWARD)
        {
            sequence = crawl;
            GotoThirdPerson(client);
            SetEntPropVector(client, Prop_Send, "m_angRotation", Angles);
            return Plugin_Handled;
        }
        else GotoFirstPerson(client);
    }
    else if (IsSurvivor(client) && IsPlayerAlive(client) && sequence != GetCrawlSequence(client))
    {
        GotoFirstPerson(client);
    }
    return Plugin_Continue;
}

bool:IsSurvivor(client)
{
    return (client > 0 && client <= MaxClients && IsClientInGame(client) && GetClientTeam(client) == 2);
}

stock bool:IsPlayerHeld(client)
{
    new jockey = GetEntPropEnt(client, Prop_Send, "m_jockeyAttacker");
    new charger = GetEntPropEnt(client, Prop_Send, "m_pummelAttacker");
    new hunter = GetEntPropEnt(client, Prop_Send, "m_pounceAttacker");
    new smoker = GetEntPropEnt(client, Prop_Send, "m_tongueOwner");
    if (jockey > 0 || charger > 0 || hunter > 0 || smoker > 0)
    {
        return true;
    }
    return false;
}
stock bool:IsIncapacitated(client)
{
    if (GetEntProp(client, Prop_Send, "m_isIncapacitated", 1) > 0)
        return true;
    return false;
}

GotoThirdPerson(client)
{
    SetEntPropFloat(client, Prop_Send, "m_TimeForceExternalView", 99999.3);
}

GotoFirstPerson(client)
{
    SetEntPropFloat(client, Prop_Send, "m_TimeForceExternalView", 0.0);
}

stock GetCrawlSequence(client)
{
    if (IsSurvivor(client))
    {
        decl String:model[64];
        GetEntPropString(client, Prop_Data, "m_ModelName", model, sizeof(model));
        if (StrContains(model, "gambler", false) != -1)
        {
            return 631;
        }
        else if (StrContains(model, "producer", false) != -1)
        {
            return 639;
        }
        else if (StrContains(model, "mechanic", false) != -1)
        {
            return 636;
        }
        else if (StrContains(model, "namvet", false) != -1)
        {
            return 539;
        }
        else if (StrContains(model, "teenangst", false) != -1)
        {
            return 529;
        }
        else if (StrContains(model, "biker", false) != -1)
        {
            return 542;
        }
        else if (StrContains(model, "manager", false) != -1)
        {
            return 539;
        }
    }
    return -1;
}