<cfsetting showdebugoutput="false">
<cfsetting enablecfoutputonly="true">
<cfcontent type="application/json; charset=utf-8" reset="true">
<cfheader name="Cache-Control" value="no-store">

<cfscript>
/**
 * Get Presence at Service Point
 * Returns users currently at the same business/service point.
 * Used by tab owner to see who they can add.
 *
 * POST: { BusinessID: int, ServicePointID: int (optional), UserID: int (requesting user, excluded from results) }
 */

try {
    requestData = deserializeJSON(toString(getHttpRequestData().content));
    businessID = val(requestData.BusinessID ?: 0);
    servicePointID = val(requestData.ServicePointID ?: 0);
    userID = val(requestData.UserID ?: 0);

    if (businessID == 0) apiAbort({ "OK": false, "ERROR": "missing_BusinessID" });

    // Get users present at this business within last 30 minutes
    // If servicePointID specified, filter to that SP; otherwise show all at the business
    if (servicePointID > 0) {
        qPresence = queryTimed("
            SELECT up.UserID, up.ServicePointID, up.LastSeenOn,
                   u.FirstName, u.LastName, u.ImageExtension,
                   sp.Name AS ServicePointName
            FROM UserPresence up
            JOIN Users u ON u.ID = up.UserID
            LEFT JOIN ServicePoints sp ON sp.ID = up.ServicePointID
            WHERE up.BusinessID = :bizID
              AND up.ServicePointID = :spID
              AND up.LastSeenOn >= DATE_SUB(NOW(), INTERVAL 30 MINUTE)
              AND up.UserID != :excludeUserID
            ORDER BY up.LastSeenOn DESC
        ", {
            bizID: { value: businessID, cfsqltype: "cf_sql_integer" },
            spID: { value: servicePointID, cfsqltype: "cf_sql_integer" },
            excludeUserID: { value: userID, cfsqltype: "cf_sql_integer" }
        });
    } else {
        qPresence = queryTimed("
            SELECT up.UserID, up.ServicePointID, up.LastSeenOn,
                   u.FirstName, u.LastName, u.ImageExtension,
                   sp.Name AS ServicePointName
            FROM UserPresence up
            JOIN Users u ON u.ID = up.UserID
            LEFT JOIN ServicePoints sp ON sp.ID = up.ServicePointID
            WHERE up.BusinessID = :bizID
              AND up.LastSeenOn >= DATE_SUB(NOW(), INTERVAL 30 MINUTE)
              AND up.UserID != :excludeUserID
            ORDER BY up.LastSeenOn DESC
        ", {
            bizID: { value: businessID, cfsqltype: "cf_sql_integer" },
            excludeUserID: { value: userID, cfsqltype: "cf_sql_integer" }
        });
    }

    users = [];
    for (row in qPresence) {
        // Check if user is already on a tab
        qOnTab = queryTimed("
            SELECT t.ID AS TabID FROM TabMembers tm
            JOIN Tabs t ON t.ID = tm.TabID
            WHERE tm.UserID = :uid AND tm.StatusID = 1 AND t.StatusID = 1
            LIMIT 1
        ", { uid: { value: row.UserID, cfsqltype: "cf_sql_integer" } });

        arrayAppend(users, {
            "UserID": row.UserID,
            "FirstName": row.FirstName,
            "LastName": row.LastName,
            "ImageExtension": row.ImageExtension ?: "",
            "ServicePointID": val(row.ServicePointID),
            "ServicePointName": row.ServicePointName ?: "",
            "LastSeenOn": toISO8601(row.LastSeenOn),
            "IsOnTab": qOnTab.recordCount > 0
        });
    }

    apiAbort({ "OK": true, "USERS": users });

} catch (any e) {
    apiAbort({ "OK": false, "ERROR": "server_error", "MESSAGE": e.message });
}
</cfscript>