Create Google datastore adaptor

backend/Cargo.lock

@@ -60,6 +60,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.71"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c7d0618f0e0b7e8ff11427422b64564d5fb0be1940354bfe2e0529b18a9d9b8"
+
 [[package]]
 name = "arrayvec"
 version = "0.7.2"
@@ -296,6 +302,12 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "base64"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3441f0f7b02788e948e47f457ca01f1d7e6d92c693bc132c22b087d3141c03ff"
+
 [[package]]
 name = "base64"
 version = "0.13.1"
@@ -333,7 +345,7 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6773ddc0eafc0e509fb60e48dff7f450f8e674a0686ae8605e8d9901bd5eefa"
 dependencies = [
- "num-bigint",
+ "num-bigint 0.4.3",
  "num-integer",
  "num-traits",
 ]
@@ -669,6 +681,15 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "ct-logs"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1a816186fa68d9e426e3cb4ae4dff1fcd8e4a2c34b781bf7a822574a0d0aac8"
+dependencies = [
+ "sct",
+]
+
 [[package]]
 name = "ctor"
 version = "0.1.26"
@@ -736,6 +757,19 @@ dependencies = [
  "parking_lot_core 0.9.7",
 ]
 
+[[package]]
+name = "datastore-adaptor"
+version = "0.1.0"
+dependencies = [
+ "async-trait",
+ "chrono",
+ "common",
+ "google-cloud",
+ "serde",
+ "serde_json",
+ "tokio",
+]
+
 [[package]]
 name = "der"
 version = "0.5.1"
@@ -832,6 +866,12 @@ dependencies = [
  "instant",
 ]
 
+[[package]]
+name = "fixedbitset"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
+
 [[package]]
 name = "flate2"
 version = "1.0.26"
@@ -1048,6 +1088,28 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "google-cloud"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a517f0235af652d334a021b81aa2e8f18a77512c26be18722debb7d405912f80"
+dependencies = [
+ "chrono",
+ "futures",
+ "http",
+ "hyper",
+ "hyper-rustls",
+ "jsonwebtoken",
+ "prost",
+ "prost-types",
+ "serde",
+ "serde_json",
+ "thiserror",
+ "tokio",
+ "tonic",
+ "tonic-build",
+]
+
 [[package]]
 name = "governor"
 version = "0.5.1"
@@ -1066,6 +1128,25 @@ dependencies = [
  "smallvec",
 ]
 
+[[package]]
+name = "h2"
+version = "0.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d357c7ae988e7d2182f7d7871d0b963962420b0678b0997ce7de72001aeab782"
+dependencies = [
+ "bytes",
+ "fnv",
+ "futures-core",
+ "futures-sink",
+ "futures-util",
+ "http",
+ "indexmap",
+ "slab",
+ "tokio",
+ "tokio-util 0.7.8",
+ "tracing",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -1225,6 +1306,7 @@ dependencies = [
  "futures-channel",
  "futures-core",
  "futures-util",
+ "h2",
  "http",
  "http-body",
  "httparse",
@@ -1238,6 +1320,23 @@ dependencies = [
  "want",
 ]
 
+[[package]]
+name = "hyper-rustls"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f9f7a97316d44c0af9b0301e65010573a853a9fc97046d7331d7f6bc0fd5a64"
+dependencies = [
+ "ct-logs",
+ "futures-util",
+ "hyper",
+ "log",
+ "rustls",
+ "rustls-native-certs",
+ "tokio",
+ "tokio-rustls",
+ "webpki",
+]
+
 [[package]]
 name = "iana-time-zone"
 version = "0.1.56"
@@ -1312,6 +1411,15 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -1336,6 +1444,20 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "jsonwebtoken"
+version = "7.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "afabcc15e437a6484fc4f12d0fd63068fe457bf93f1c148d3d9649c60b103f32"
+dependencies = [
+ "base64 0.12.3",
+ "pem",
+ "ring",
+ "serde",
+ "serde_json",
+ "simple_asn1",
+]
+
 [[package]]
 name = "kv-log-macro"
 version = "1.0.7"
@@ -1494,6 +1616,12 @@ dependencies = [
  "windows-sys 0.45.0",
 ]
 
+[[package]]
+name = "multimap"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5ce46fe64a9d73be07dcbe690a38ce1b293be448fd8ce1e6c1b8062c9f72c6a"
+
 [[package]]
 name = "native-tls"
 version = "0.2.11"
@@ -1550,6 +1678,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "num-bigint"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "090c7f9998ee0ff65aa5b723e4009f7b217707f1fb5ea551329cc4d6231fb304"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-bigint"
 version = "0.4.3"
@@ -1764,6 +1903,17 @@ version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f746c4065a8fa3fe23974dd82f15431cc8d40779821001404d10d2e79ca7d79"
 
+[[package]]
+name = "pem"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd56cbd21fea48d0c440b41cd69c589faacade08c992d9a54e471b79d0fd13eb"
+dependencies = [
+ "base64 0.13.1",
+ "once_cell",
+ "regex",
+]
+
 [[package]]
 name = "pem-rfc7468"
 version = "0.3.1"
@@ -1779,6 +1929,16 @@ version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "478c572c3d73181ff3c2539045f6eb99e5491218eae919370993b890cdbdd98e"
 
+[[package]]
+name = "petgraph"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "467d164a6de56270bd7c4d070df81d07beace25012d5103ced4e9ff08d6afdb7"
+dependencies = [
+ "fixedbitset",
+ "indexmap",
+]
+
 [[package]]
 name = "pin-project"
 version = "1.0.12"
@@ -1903,6 +2063,57 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "prost"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e6984d2f1a23009bd270b8bb56d0926810a3d483f59c987d77969e9d8e840b2"
+dependencies = [
+ "bytes",
+ "prost-derive",
+]
+
+[[package]]
+name = "prost-build"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32d3ebd75ac2679c2af3a92246639f9fcc8a442ee420719cc4fe195b98dd5fa3"
+dependencies = [
+ "bytes",
+ "heck 0.3.3",
+ "itertools 0.9.0",
+ "log",
+ "multimap",
+ "petgraph",
+ "prost",
+ "prost-types",
+ "tempfile",
+ "which",
+]
+
+[[package]]
+name = "prost-derive"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "169a15f3008ecb5160cba7d37bcd690a7601b6d30cfb87a117d45e59d52af5d4"
+dependencies = [
+ "anyhow",
+ "itertools 0.9.0",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "prost-types"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b518d7cdd93dab1d1122cf07fa9a60771836c668dde9d9e2a139f957f0d9f1bb"
+dependencies = [
+ "bytes",
+ "prost",
+]
+
 [[package]]
 name = "ptr_meta"
 version = "0.1.4"
@@ -2063,6 +2274,21 @@ dependencies = [
  "bytecheck",
 ]
 
+[[package]]
+name = "ring"
+version = "0.16.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
+dependencies = [
+ "cc",
+ "libc",
+ "once_cell",
+ "spin 0.5.2",
+ "untrusted",
+ "web-sys",
+ "winapi",
+]
+
 [[package]]
 name = "rkyv"
 version = "0.7.41"
@@ -2175,6 +2401,31 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35edb675feee39aec9c99fa5ff985081995a06d594114ae14cbe797ad7b7a6d7"
+dependencies = [
+ "base64 0.13.1",
+ "log",
+ "ring",
+ "sct",
+ "webpki",
+]
+
+[[package]]
+name = "rustls-native-certs"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a07b7c1885bd8ed3831c289b7870b13ef46fe0e856d288c30d9cc17d75a2092"
+dependencies = [
+ "openssl-probe",
+ "rustls",
+ "schannel",
+ "security-framework",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.12"
@@ -2217,6 +2468,16 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1792db035ce95be60c3f8853017b3999209281c24e2ba5bc8e59bf97a0c590c1"
 
+[[package]]
+name = "sct"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b362b83898e0e69f38515b82ee15aa80636befe47c3b6d3d89a911e78fc228ce"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
 [[package]]
 name = "sea-orm"
 version = "0.11.3"
@@ -2411,18 +2672,18 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.162"
+version = "1.0.163"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71b2f6e1ab5c2b98c05f0f35b236b22e8df7ead6ffbf51d7808da7f8817e7ab6"
+checksum = "2113ab51b87a539ae008b5c6c02dc020ffa39afd2d83cffcb3f4eb2722cebec2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.162"
+version = "1.0.163"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2a0814352fd64b58489904a44ea8d90cb1a91dcb6b4f5ebabc32c8318e93cb6"
+checksum = "8c805777e3930c8883389c602315a24224bcc738b63905ef87cd1420353ea93e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2516,6 +2777,17 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f27f6278552951f1f2b8cf9da965d10969b2efdea95a6ec47987ab46edfe263a"
 
+[[package]]
+name = "simple_asn1"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "692ca13de57ce0613a363c8c2f1de925adebc81b04c923ac60c5488bb44abe4b"
+dependencies = [
+ "chrono",
+ "num-bigint 0.2.6",
+ "num-traits",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.8"
@@ -2586,7 +2858,7 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c12bc9199d1db8234678b7051747c07f517cdcf019262d1847b94ec8b1aee3e"
 dependencies = [
- "itertools",
+ "itertools 0.10.5",
  "nom",
  "unicode_categories",
 ]
@@ -2639,7 +2911,7 @@ dependencies = [
  "log",
  "md-5",
  "memchr",
- "num-bigint",
+ "num-bigint 0.4.3",
  "once_cell",
  "paste",
  "percent-encoding",
@@ -2850,9 +3122,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.28.0"
+version = "1.28.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3c786bf8134e5a3a166db9b29ab8f48134739014a3eca7bc6bfa95d673b136f"
+checksum = "0aa32867d44e6f2ce3385e89dceb990188b8bb0fb25b0cf576647a6f98ac5105"
 dependencies = [
  "autocfg",
  "bytes",
@@ -2888,6 +3160,17 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-rustls"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc6844de72e57df1980054b38be3a9f4702aba4858be64dd700181a8a6d0e1b6"
+dependencies = [
+ "rustls",
+ "tokio",
+ "webpki",
+]
+
 [[package]]
 name = "tokio-stream"
 version = "0.1.14"
@@ -2899,6 +3182,34 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-util"
+version = "0.6.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36943ee01a6d67977dd3f84a5a1d2efeb4ada3a1ae771cadfaa535d9d9fc6507"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "log",
+ "pin-project-lite",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "806fe8c2c87eccc8b3267cbae29ed3ab2d0bd37fca70ab622e46aaa9375ddb7d"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "pin-project-lite",
+ "tokio",
+ "tracing",
+]
+
 [[package]]
 name = "toml"
 version = "0.5.11"
@@ -2908,6 +3219,48 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "tonic"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ac42cd97ac6bd2339af5bcabf105540e21e45636ec6fa6aae5e85d44db31be0"
+dependencies = [
+ "async-stream",
+ "async-trait",
+ "base64 0.13.1",
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "h2",
+ "http",
+ "http-body",
+ "hyper",
+ "percent-encoding",
+ "pin-project",
+ "prost",
+ "prost-derive",
+ "tokio",
+ "tokio-rustls",
+ "tokio-stream",
+ "tokio-util 0.6.10",
+ "tower",
+ "tower-service",
+ "tracing",
+ "tracing-futures",
+]
+
+[[package]]
+name = "tonic-build"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c695de27302f4697191dda1c7178131a8cb805463dda02864acb80fe1322fdcf"
+dependencies = [
+ "proc-macro2",
+ "prost-build",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "tower"
 version = "0.4.13"
@@ -2916,9 +3269,13 @@ checksum = "b8fa9be0de6cf49e536ce1851f987bd21a43b771b09473c3549a6c853db37c1c"
 dependencies = [
  "futures-core",
  "futures-util",
+ "indexmap",
  "pin-project",
  "pin-project-lite",
+ "rand",
+ "slab",
  "tokio",
+ "tokio-util 0.7.8",
  "tower-layer",
  "tower-service",
  "tracing",
@@ -3009,6 +3366,16 @@ dependencies = [
  "valuable",
 ]
 
+[[package]]
+name = "tracing-futures"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
+dependencies = [
+ "pin-project",
+ "tracing",
+]
+
 [[package]]
 name = "tracing-log"
 version = "0.1.3"
@@ -3098,6 +3465,12 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39ec24b3121d976906ece63c9daad25b85969647682eee313cb5779fdd69e14e"
 
+[[package]]
+name = "untrusted"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
+
 [[package]]
 name = "url"
 version = "2.3.1"
@@ -3300,6 +3673,27 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "webpki"
+version = "0.21.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8e38c0608262c46d4a56202ebabdeb094cef7e560ca7a226c6bf055188aa4ea"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
+name = "which"
+version = "4.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2441c784c52b289a054b7201fc93253e288f094e2f4be9058343127c4226a269"
+dependencies = [
+ "either",
+ "libc",
+ "once_cell",
+]
+
 [[package]]
 name = "whoami"
 version = "1.4.0"

backend/adaptors/datastore/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "datastore-adaptor"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+async-trait = "0.1.68"
+chrono = "0.4.24"
+common = { path = "../../common" }
+google-cloud = { version = "0.2.1", features = ["datastore"] }
+serde = "1.0.163"
+serde_json = "1.0.96"
+tokio = { version = "1.28.1", features = ["rt-multi-thread"] }

backend/adaptors/datastore/src/lib.rs

@@ -0,0 +1,193 @@
+use std::{collections::HashMap, env, error::Error, fmt::Display};
+
+use async_trait::async_trait;
+use chrono::{DateTime, NaiveDateTime, Utc};
+use common::{
+    adaptor::Adaptor,
+    event::{Event, EventDeletion},
+    person::Person,
+    stats::Stats,
+};
+use google_cloud::{
+    authorize::ApplicationCredentials,
+    datastore::{Client, Filter, FromValue, IntoValue, Key, Query, Value},
+    error::ConvertError,
+};
+use tokio::sync::Mutex;
+
+pub struct DatastoreAdaptor {
+    client: Mutex<Client>,
+}
+
+// Keys
+const STATS_KIND: &str = "Stats";
+const EVENT_KIND: &str = "Event";
+const PERSON_KIND: &str = "Person";
+const STATS_EVENTS_ID: &str = "eventCount";
+const STATS_PEOPLE_ID: &str = "personCount";
+
+#[async_trait]
+impl Adaptor for DatastoreAdaptor {
+    type Error = DatastoreAdaptorError;
+
+    async fn get_stats(&self) -> Result<Stats, Self::Error> {
+        let mut client = self.client.lock().await;
+
+        let key = Key::new(STATS_KIND);
+        let event_count = client
+            .get(key.clone().id(STATS_EVENTS_ID))
+            .await?
+            .unwrap_or(0);
+        let person_count = client.get(key.id(STATS_PEOPLE_ID)).await?.unwrap_or(0);
+
+        Ok(Stats {
+            event_count,
+            person_count,
+        })
+    }
+
+    async fn increment_stat_event_count(&self) -> Result<i64, Self::Error> {
+        let mut client = self.client.lock().await;
+
+        let key = Key::new(STATS_KIND).id(STATS_EVENTS_ID);
+        let event_count = client.get(key.clone()).await?.unwrap_or(0) + 1;
+        client.put((key, event_count)).await?;
+        Ok(event_count)
+    }
+
+    async fn increment_stat_person_count(&self) -> Result<i64, Self::Error> {
+        let mut client = self.client.lock().await;
+
+        let key = Key::new(STATS_KIND).id(STATS_PEOPLE_ID);
+        let person_count = client.get(key.clone()).await?.unwrap_or(0) + 1;
+        client.put((key, person_count)).await?;
+        Ok(person_count)
+    }
+
+    async fn get_people(&self, event_id: String) -> Result<Option<Vec<Person>>, Self::Error> {
+        let mut client = self.client.lock().await;
+
+        // Check the event exists
+        if client
+            .get::<Value, _>(Key::new(EVENT_KIND).id(event_id.clone()))
+            .await?
+            .is_none()
+        {
+            return Ok(None);
+        }
+
+        Ok(Some(
+            client
+                .query(
+                    Query::new(PERSON_KIND)
+                        .filter(Filter::Equal("eventId".into(), event_id.into_value())),
+                )
+                .await?
+                .into_iter()
+                .filter_map(|entity| parse_into_person(entity.properties().clone()).ok())
+                .collect(),
+        ))
+    }
+
+    async fn upsert_person(&self, event_id: String, person: Person) -> Result<Person, Self::Error> {
+        let mut client = self.client.lock().await;
+        todo!()
+    }
+
+    async fn get_event(&self, id: String) -> Result<Option<Event>, Self::Error> {
+        let mut client = self.client.lock().await;
+        todo!()
+    }
+
+    async fn create_event(&self, event: Event) -> Result<Event, Self::Error> {
+        let mut client = self.client.lock().await;
+        todo!()
+    }
+
+    async fn delete_event(&self, id: String) -> Result<EventDeletion, Self::Error> {
+        let mut client = self.client.lock().await;
+        todo!()
+    }
+}
+
+impl DatastoreAdaptor {
+    pub async fn new() -> Self {
+        let project_name = env::var("GCP_PROJECT_NAME").unwrap();
+
+        // Load credentials
+        let credentials: ApplicationCredentials =
+            serde_json::from_str(&env::var("GCP_CREDENTIALS").unwrap()).unwrap();
+
+        // Connect to datastore
+        let client = Client::from_credentials(project_name.clone(), credentials)
+            .await
+            .unwrap();
+        let client = Mutex::new(client);
+
+        println!("🎛️ Connected to datastore in project {}", project_name);
+
+        Self { client }
+    }
+}
+
+fn parse_into_person(value: Value) -> Result<Person, DatastoreAdaptorError> {
+    let person: HashMap<String, Value> = HashMap::from_value(value)?;
+    Ok(Person {
+        name: String::from_value(
+            person
+                .get("name")
+                .ok_or(ConvertError::MissingProperty("name".to_owned()))?
+                .clone(),
+        )?,
+        password_hash: person
+            .get("password")
+            .map(|p| String::from_value(p.clone()))
+            .transpose()?,
+        created_at: DateTime::from_utc(
+            NaiveDateTime::from_timestamp_opt(
+                i64::from_value(
+                    person
+                        .get("created")
+                        .ok_or(ConvertError::MissingProperty("created".to_owned()))?
+                        .clone(),
+                )?,
+                0,
+            )
+            .unwrap(),
+            Utc,
+        ),
+        availability: Vec::from_value(
+            person
+                .get("availability")
+                .ok_or(ConvertError::MissingProperty("availability".to_owned()))?
+                .clone(),
+        )?,
+    })
+}
+
+#[derive(Debug)]
+pub enum DatastoreAdaptorError {
+    DatastoreError(google_cloud::error::Error),
+}
+
+impl Display for DatastoreAdaptorError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            DatastoreAdaptorError::DatastoreError(e) => write!(f, "Datastore Error: {}", e),
+        }
+    }
+}
+
+impl Error for DatastoreAdaptorError {}
+
+impl From<google_cloud::error::Error> for DatastoreAdaptorError {
+    fn from(value: google_cloud::error::Error) -> Self {
+        Self::DatastoreError(value)
+    }
+}
+
+impl From<google_cloud::error::ConvertError> for DatastoreAdaptorError {
+    fn from(value: google_cloud::error::ConvertError) -> Self {
+        Self::DatastoreError(google_cloud::error::Error::Convert(value))
+    }
+}

backend/adaptors/sql/src/lib.rs

@@ -33,23 +33,23 @@ impl Adaptor for SqlAdaptor {
     async fn get_stats(&self) -> Result<Stats, Self::Error> {
         let stats_row = get_stats_row(&self.db).await?;
         Ok(Stats {
-            event_count: stats_row.event_count.unwrap(),
+            event_count: stats_row.event_count.unwrap() as i64,
-            person_count: stats_row.person_count.unwrap(),
+            person_count: stats_row.person_count.unwrap() as i64,
         })
     }
 
-    async fn increment_stat_event_count(&self) -> Result<i32, Self::Error> {
+    async fn increment_stat_event_count(&self) -> Result<i64, Self::Error> {
         let mut current_stats = get_stats_row(&self.db).await?;
         current_stats.event_count = Set(current_stats.event_count.unwrap() + 1);
 
-        Ok(current_stats.save(&self.db).await?.event_count.unwrap())
+        Ok(current_stats.save(&self.db).await?.event_count.unwrap() as i64)
     }
 
-    async fn increment_stat_person_count(&self) -> Result<i32, Self::Error> {
+    async fn increment_stat_person_count(&self) -> Result<i64, Self::Error> {
         let mut current_stats = get_stats_row(&self.db).await?;
         current_stats.person_count = Set(current_stats.person_count.unwrap() + 1);
 
-        Ok(current_stats.save(&self.db).await?.person_count.unwrap())
+        Ok(current_stats.save(&self.db).await?.person_count.unwrap() as i64)
     }
 
     async fn get_people(&self, event_id: String) -> Result<Option<Vec<Person>>, Self::Error> {

backend/common/src/adaptor.rs

@@ -15,8 +15,8 @@ pub trait Adaptor: Send + Sync {
     type Error: Error;
 
     async fn get_stats(&self) -> Result<Stats, Self::Error>;
-    async fn increment_stat_event_count(&self) -> Result<i32, Self::Error>;
+    async fn increment_stat_event_count(&self) -> Result<i64, Self::Error>;
-    async fn increment_stat_person_count(&self) -> Result<i32, Self::Error>;
+    async fn increment_stat_person_count(&self) -> Result<i64, Self::Error>;
 
     async fn get_people(&self, event_id: String) -> Result<Option<Vec<Person>>, Self::Error>;
     async fn upsert_person(&self, event_id: String, person: Person) -> Result<Person, Self::Error>;

backend/common/src/stats.rs

@@ -1,4 +1,4 @@
 pub struct Stats {
-    pub event_count: i32,
+    pub event_count: i64,
-    pub person_count: i32,
+    pub person_count: i64,
 }

backend/src/payloads.rs

@@ -37,8 +37,8 @@ impl From<Event> for EventResponse {
 
 #[derive(Serialize, ToSchema)]
 pub struct StatsResponse {
-    pub event_count: i32,
+    pub event_count: i64,
-    pub person_count: i32,
+    pub person_count: i64,
     pub version: String,
 }