app/matrix/appservice-telegram.libsonnet

local kube = import "../../kube/kube.libsonnet";

{
    AppServiceTelegram(name):: {
        local bridge = self,
        local cfg = bridge.cfg,
        cfg:: {
            metadata: {},
            image: error "image must be set",
            storageClassName: error "storageClassName must be set",

            // Data that will be serialized into the appservice's config.yaml.
            // This is taken straight from a YAML that was generated by
            // dock.mau.dev/tulir/mautrix-telegram:v0.8.2. We override here
            // fields that we know are strictly necessary to be configured when
            // instantiating this template.
            config: (std.native("parseYaml")(importstr "appservice-telegram.yaml")[0]) + {
                homeserver+: {
                    address: error "homeserver.address must be set",
                    domain: error "homeserver.domain must be set",
                },
                appservice+: {
                    address: bridge.svc.http_url,
                    // We disable this. I have no idea what it does, but it
                    // wants a secret. ~q3k
                    provisioning+: {
                        enabled: false,
                        shared_secret: if self.enabled then error "appservice.provisioning.shared_secret must be set" else "hackme",
                    },
                    id: error "appservice.id must be set",
                    as_token: "This value is generated when generating the registration",
                    hs_token: "This value is generated when generating the registration",
                },
                telegram+: {
                    api_id: error "telegram.api_id must be set",
                    api_hash: error "telegram.api_hash must be set",
                    bot_token: error "telegram.bot_token must be set",
                },
                bridge+: {
                    permissions: {
                        '*': "relaybot",
                    },
                },
            },
        },

        config: kube.Secret("appservice-telegram-%s" % [name]) {
            metadata+: cfg.metadata,
            data: {
                "config.yaml": std.base64(std.manifestYamlDoc(cfg.config)),
            },
        },

        dataVolume: kube.PersistentVolumeClaim("appservice-telegram-%s" % [name]) {
            metadata+: cfg.metadata,
            spec+: {
                storageClassName: cfg.storageClassName,
                accessModes: [ "ReadWriteOnce" ],
                resources: {
                    requests: {
                        storage: "10Gi",
                    },
                },
            },
        },

        bootstrapJob: kube.Job("appservice-telegram-%s-bootstrap" % [name]) {
            metadata+: cfg.metadata {
                labels: {
                    "job-name": "appservice-telegram-%s-bootstrap" % [name],
                },
            },
            spec+: {
                template+: {
                    spec+: {
                        volumes_: {
                            config: kube.SecretVolume(bridge.config),
                        },
                        containers_: {
                            bootstrap: kube.Container("appservice-telegram-%s-bootstrap" % [name]) {
                                image: cfg.image,
                                command: [
                                    "sh", "-c",
                                    "python3 -m mautrix_telegram -g -c /config/config.yaml -r /tmp/registration.yaml && echo SNIPSNIP && cat /tmp/registration.yaml",
                                ],
                                volumeMounts_: {
                                    config: { mountPath: "/config" },
                                },
                            },
                        },
                    },
                },
            },
        },

        deployment: kube.Deployment("appservice-telegram-%s" % [name]) {
            metadata+: cfg.metadata,
            spec+: {
                replicas: 1,
                template+: {
                    spec+: {
                        volumes_: {
                            config: kube.SecretVolume(bridge.config),
                            data: kube.PersistentVolumeClaimVolume(bridge.dataVolume),
                            registration: { secret: { secretName: "appservice-telegram-%s-registration" % [name] } },
                        },
                        initContainers: [
                            // This container takes the stateless config from the Secret, and
                            // updates it with the registration secrets from the registration token.
                            kube.Container("generate-config") {
                                volumeMounts_: {
                                    config: { mountPath: "/config", },
                                    registration: { mountPath: "/registration", },
                                    data: { mountPath: "/data" },
                                },
                                // Ow, the edge! We need yq.
                                // See: https://github.com/mikefarah/yq/issues/190#issuecomment-667519015
                                image: "alpine@sha256:156f59dc1cbe233827642e09ed06e259ef6fa1ca9b2e29d52ae14d5e7b79d7f0",
                                command: [
                                    "sh", "-c", |||
                                        set -e -x
                                        apk add --no-cache yq
                                        cp /config/config.yaml /data/config.yaml
                                        yq w -i /data/config.yaml appservice.as_token $(yq r /registration/registration.yaml as_token)
                                        yq w -i /data/config.yaml appservice.hs_token $(yq r /registration/registration.yaml hs_token)
                                    |||
                                ],
                            },
                        ],
                        containers_: {
                            appserviceIrc: kube.Container("appservice-telegram-%s" % [name]) {
                                image: cfg.image,
                                command: [
                                    "sh", "-c", |||
                                        alembic -x config=/data/config.yaml upgrade head
                                        python3 -m mautrix_telegram -n -c /data/config.yaml
                                    |||
                                ],
                                ports_: {
                                    http: { containerPort: 29317 },
                                },
                                volumeMounts_: {
                                    data: { mountPath: "/data" },
                                },
                            },
                        },
                    },
                },
            },
        },

        svc: kube.Service("appservice-telegram-%s" % [name]) {
            metadata+: cfg.metadata,
            target_pod:: bridge.deployment.spec.template,
        },
    },
}