abtest.vcl

sub abtest_recv {

    #####################
    ## Courier-Journal
    #####################
    if (req.http.x-uscp-property ~ "^courier-?journal$" && req.url.path ~ "^/$" && req.http.x-uscp-site == "desktop") {
        # If the user has already been assigned to a test variant, we set X-AbVariant.
        if (req.http.Cookie:abtest120) {
            set req.http.X-AbVariant = req.http.Cookie:abtest120;
        # If the user was part of the previous test (113), we grandfather them in accordingly. We do this to avoid
        # disrupting the user experience for users who have become acclimated to the new list UI.
        } else if (req.http.Cookie:abtest113) {
            # The user was part of the previous, singular list variant, so we give them a 50% chance to be assigned
            # to one of the new test variants.
            if (req.http.Cookie:abtest113 == "113_list") {
                if (randombool(50,100)) {
                    set req.http.X-AbVariant = "120_right_rail";
                } else {
                    set req.http.X-AbVariant = "120_left_rail";
                }
            # If the user was part of the previous legacy variant, which was 20% of users, we want half of them to be
            # bucketed into the new legacy variant, giving us the 10/10/10 split across the three variants (30%).
            } else if (req.http.Cookie:abtest113 == "113_legacy" && randombool(50,100)) {
                set req.http.X-AbVariant = "120_legacy";
            } else {
                set req.http.X-AbVariant = "120_untested";
            }
        # The user wasn't part of previous test, so we give them a 30% chance to get into the new test.
        } else if (randombool(30,100)) {
            if (randombool(66,99)) {
                # 10% chance to get into the right rail variant.
                if (randombool(50,100)) {
                    set req.http.X-AbVariant = "120_right_rail";
                # 10% chance to get into the left rail variant.
                } else {
                    set req.http.X-AbVariant = "120_left_rail";
                }
            # 10% chance to get into the legacy variant.
            } else {
                set req.http.X-AbVariant = "120_legacy";
            }
        } else {
            set req.http.X-AbVariant = "120_untested";
        }
        if (req.http.X-AbVariant == "120_right_rail" || req.http.X-AbVariant == "120_left_rail") {
            set req.http.X-AltUrl = "/home/list_variant_a/";
        }
        if (req.http.X-AbVariant == "120_left_rail") {
            set req.http.X-flLayoutOptions = "sidebar-left right-images inline-video gallery-mosaic";
        }
    }

    #####################
    ## Cincinnati
    #####################
    if (req.http.x-uscp-property == "cincinnati" && req.url.path ~ "^/$" && req.http.x-uscp-site == "desktop" ) {
        # If the user has already been assigned to a test variant, we set X-AbVariant.
        if (req.http.Cookie:abtest121) {
            set req.http.X-AbVariant = req.http.Cookie:abtest121;
        # If the user was part of the previous test (115), we grandfather them in accordingly. We do this to avoid
        # disrupting the user experience for users who have become acclimated to the new list UI.
        } else if (req.http.Cookie:abtest115) {
            # The user was part of the previous, singular list variant, so we give them a 50% chance to be assigned
            # to one of the new test variants.
            if (req.http.Cookie:abtest115 == "115_list") {
                if (randombool(50,100)) {
                    set req.http.X-AbVariant = "121_right_rail";
                } else {
                    set req.http.X-AbVariant = "121_left_rail";
                }
            # If the user was part of the previous legacy variant, which was 20% of users, we want half of them to be
            # bucketed into the new legacy variant, giving us the 10/10/10 split across the three variants (30%).
            } else if (req.http.Cookie:abtest115 == "115_legacy" && randombool(50,100)) {
                set req.http.X-AbVariant = "121_legacy";
            } else {
                set req.http.X-AbVariant = "121_untested";
            }
        # The user wasn't part of previous test, so we give them a 30% chance to get into the new test.
        } else if (randombool(30,100)) {
            if (randombool(66,99)) {
                # 10% chance to get into the right rail variant.
                if (randombool(50,100)) {
                    set req.http.X-AbVariant = "121_right_rail";
                # 10% chance to get into the left rail variant.
                } else {
                    set req.http.X-AbVariant = "121_left_rail";
                }
            # 10% chance to get into the legacy variant.
            } else {
                set req.http.X-AbVariant = "121_legacy";
            }
        } else {
            set req.http.X-AbVariant = "121_untested";
        }
        if (req.http.X-AbVariant == "121_right_rail" || req.http.X-AbVariant == "121_left_rail") {
            set req.http.X-AltUrl = "/home/list_variant_a/";
        }
        if (req.http.X-AbVariant == "121_left_rail") {
            set req.http.X-flLayoutOptions = "sidebar-left right-images inline-video gallery-mosaic";
        }
    }

    #####################
    ## Coloradoan
    #####################
    if (req.http.x-uscp-property == "coloradoan" && req.http.x-uscp-site == "desktop" ) {
        if (req.url.path ~ "^/$" || req.url.path ~ "^/([^/]+)/$" || req.url.path ~ "^/([^/]+)/([^/]+)/$") {
            if (req.http.Cookie:abtest119) {
                set req.http.X-AbVariant = req.http.Cookie:abtest119;
            } else if (randombool(50,100)) {
                set req.http.X-AbVariant = "119_left_rail";
            } else {
                set req.http.X-AbVariant = "119_right_rail";
            }
            if (req.http.X-AbVariant == "119_left_rail") {
                set req.http.X-flLayoutOptions = "sidebar-left right-images inline-video gallery-mosaic";
            }
        }
    }

}


sub abtest_fetch {

    # Vary on X-AbVariant
    if (beresp.http.Vary) {
        set beresp.http.Vary = beresp.http.Vary ", X-AbVariant";
    } else {
        set beresp.http.Vary = "X-AbVariant";
    }

    # Vary on X-AltUrl
    if (beresp.http.Vary) {
        set beresp.http.Vary = beresp.http.Vary ", X-AltUrl";
    } else {
        set beresp.http.Vary = "X-AltUrl";
    }

}


sub abtest_deliver {

    #####################
    ## Courier-Journal
    #####################
    if (req.http.x-uscp-property ~ "^courier-?journal$" && req.http.X-AbVariant ~ "^120_" && req.http.x-uscp-site == "desktop") {
        if (!req.http.Cookie:abtest120) {
            add resp.http.Set-Cookie = "abtest120=" req.http.X-AbVariant "; path=/; expires=" now + 180d ";";
        }
        add resp.http.X-AbVariant = req.http.X-AbVariant;
    }

    #####################
    ## Cincinnati
    #####################
    if (req.http.x-uscp-property == "cincinnati" && req.http.X-AbVariant ~ "^121_" && req.http.x-uscp-site == "desktop") {
        if (!req.http.Cookie:abtest121) {
            add resp.http.Set-Cookie = "abtest121=" req.http.X-AbVariant "; path=/; expires=" now + 180d ";";
        }
        add resp.http.X-AbVariant = req.http.X-AbVariant;
    }

    #####################
    ## Coloradoan
    #####################
    if (req.http.x-uscp-property == "coloradoan" && req.http.X-AbVariant && req.http.x-uscp-site == "desktop") {
        if (req.http.X-AbVariant ~ "^119_" && !req.http.Cookie:abtest119) {
            add resp.http.Set-Cookie = "abtest119=" req.http.X-AbVariant "; path=/; expires=" now + 180d ";";
        }
        add resp.http.X-AbVariant = req.http.X-AbVariant;
    }

}