Add identity_hash column

entity/src/transaction.rs

@@ -16,6 +16,8 @@ pub struct Model {
     pub notes: Option<String>,
     pub receipt: Option<String>,
     pub description: Option<String>,
+    #[sea_orm(unique)]
+    pub identity_hash: Option<i64>,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]

migration/src/lib.rs

@@ -1,6 +1,7 @@
 pub use sea_orm_migration::prelude::*;
 
 pub mod m20230904_141851_create_monzo_tables;
+mod m20240529_195030_add_transaction_identity_hash;
 
 pub struct Migrator;
 
@@ -11,6 +12,9 @@ impl MigratorTrait for Migrator {
     }
 
     fn migrations() -> Vec<Box<dyn MigrationTrait>> {
-        vec![Box::new(m20230904_141851_create_monzo_tables::Migration)]
+        vec![
+            Box::new(m20230904_141851_create_monzo_tables::Migration),
+            Box::new(m20240529_195030_add_transaction_identity_hash::Migration),
+        ]
     }
 }

migration/src/m20240529_195030_add_transaction_identity_hash.rs

@@ -0,0 +1,34 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager.alter_table(
+            TableAlterStatement::new()
+                .table(Transaction::Table)
+                .add_column(
+                    ColumnDef::new(Transaction::IdentityHash)
+                        .big_integer()
+                        .unique_key(),
+                ).to_owned()
+        ).await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager.alter_table(
+            TableAlterStatement::new()
+                .table(Transaction::Table)
+                .drop_column(Transaction::IdentityHash)
+                .to_owned()
+        ).await
+    }
+}
+
+#[derive(DeriveIden)]
+enum Transaction {
+    Table,
+    IdentityHash,
+}

src/ingestion/db.rs

@@ -7,6 +7,7 @@ use sea_orm::{
     ConnectionTrait, DatabaseBackend, DatabaseTransaction, DbErr, QueryFilter, QueryTrait,
     Statement,
 };
+use crate::ingestion::ingestion_logic::MonzoRow;
 
 pub struct Insertion {
     pub transaction: transaction::ActiveModel,
@@ -52,9 +53,13 @@ async fn update_expenditures(
 // trying to move failures earlier and improve reporting.
 pub async fn insert(
     db: &DatabaseConnection,
-    insertions: Vec<Insertion>,
+    monzo_rows: Vec<MonzoRow>,
 ) -> Result<Vec<String>, AppError> {
     let mut new_transaction_ids = Vec::new();
+    let insertions = monzo_rows
+        .into_iter()
+        .map(MonzoRow::into_insertion)
+        .collect::<Result<Vec<_>, _>>()?;
 
     for insertions in insertions.chunks(400) {
         let tx = db.begin().await?;
@@ -77,10 +82,12 @@ async fn update_transactions(
     insertions: &[Insertion],
     tx: &DatabaseTransaction,
 ) -> Result<Vec<String>, AppError> {
+
+
     let insert =
         transaction::Entity::insert_many(insertions.iter().map(|i| &i.transaction).cloned())
             .on_conflict(
-                OnConflict::column(transaction::Column::Id)
+                OnConflict::columns([transaction::Column::Id, transaction::Column::IdentityHash])
                     .update_columns(transaction::Column::iter())
                     .to_owned(),
             )

src/ingestion/ingestion_logic.rs

@@ -1,13 +1,14 @@
+use std::hash::Hash;
 use crate::ingestion::db::Insertion;
-use anyhow::Context;
+use anyhow::{anyhow, Context};
 use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime};
 use csv::StringRecord;
 use entity::expenditure::ActiveModel;
 use entity::transaction;
 use num_traits::FromPrimitive;
 use sea_orm::prelude::Decimal;
-use sea_orm::ActiveValue::*;
 use sea_orm::IntoActiveModel;
+use serde_json::Value;
 
 #[allow(dead_code)]
 mod headings {
@@ -29,7 +30,23 @@ mod headings {
     pub const CATEGORY_SPLIT: usize = 15;
 }
 
-fn parse_section(monzo_transaction_id: &str, section: &str) -> anyhow::Result<ActiveModel> {
+#[derive(Debug, Eq, PartialEq, Hash)]
+pub struct MonzoRow {
+    category_split: Option<String>,
+    primary_category: String,
+    total_amount: Decimal,
+    receipt: Option<String>,
+    notes: Option<String>,
+    emoji: Option<String>,
+    description: Option<String>,
+    transaction_type: String,
+    title: String,
+    timestamp: NaiveDateTime,
+    transaction_id: String,
+}
+
+impl MonzoRow {
+    fn parse_section(monzo_transaction_id: &str, section: &str) -> anyhow::Result<ActiveModel> {
         let mut components = section.split(':');
         let category: String = components
             .next()
@@ -45,25 +62,78 @@ fn parse_section(monzo_transaction_id: &str, section: &str) -> anyhow::Result<Ac
             transaction_id: monzo_transaction_id.to_string(),
             category,
             amount,
+        }.into_active_model())
+    }
+
+    /// Compute a hash of this row, returning the number as an i64 to be used as a unique constraint
+    /// in the database.
+    pub fn compute_hash(&self) -> i64 {
+        use std::collections::hash_map::DefaultHasher;
+        use std::hash::Hasher;
+
+        let mut hasher = DefaultHasher::new();
+        self.hash(&mut hasher);
+        hasher.finish() as i64
+    }
+
+    pub fn into_insertion(self) -> Result<Insertion, anyhow::Error> {
+        let expenditures: Vec<_> = match self.category_split {
+            Some(split) if !split.is_empty() => split
+                .split(',')
+                .map(|section| Self::parse_section(&self.transaction_id, section))
+                .collect::<Result<Vec<_>, anyhow::Error>>()?,
+
+            _ => vec![entity::expenditure::Model {
+                category: self.primary_category.clone(),
+                amount: self.total_amount,
+                transaction_id: self.transaction_id.clone(),
+            }
+                .into_active_model()],
+        };
+
+        Ok(Insertion {
+            transaction: transaction::Model {
+                id: self.transaction_id,
+                transaction_type: self.transaction_type,
+                timestamp: self.timestamp,
+                title: self.title,
+                emoji: self.emoji,
+                notes: self.notes,
+                receipt: self.receipt,
+                total_amount: self.total_amount,
+                description: self.description,
+                identity_hash: Some(self.compute_hash()),
+            }.into_active_model(),
+
+            contained_expenditures: expenditures,
+        })
     }
-    .into_active_model())
 }
 
-fn json_opt(value: &serde_json::Value) -> Option<String> {
+fn json_opt(value: &Value) -> Option<String> {
     match value {
-        serde_json::Value::String(string) if string.is_empty() => None,
+        Value::String(string) if string.is_empty() => None,
-        serde_json::Value::String(string) => Some(string.to_string()),
+        Value::String(string) => Some(string.to_string()),
         _ => None,
     }
 }
 
-pub fn from_json_row(row: Vec<serde_json::Value>) -> anyhow::Result<Insertion> {
+fn json_required_str(value: &Value, label: &str) -> anyhow::Result<String> {
-    use serde_json::Value;
+    match value {
-    let monzo_transaction_id = row[headings::TRANSACTION_ID]
+        Value::String(string) if string.is_empty() => Err(anyhow!("{} is empty", label)),
-        .as_str()
+        Value::String(string) => Ok(string.to_string()),
-        .context("No transaction id")?
+        _ => Err(anyhow!("{} is not a string", label)),
-        .to_string();
+    }
+}
 
+fn parse_timestamp(date: &str, time: &str) -> anyhow::Result<NaiveDateTime> {
+    let date = NaiveDate::parse_from_str(date, "%Y-%m-%d")?;
+    let time = NaiveTime::parse_from_str(time, "%H:%M:%S")?;
+
+    Ok(date.and_time(time))
+}
+
+pub fn from_json_row(row: Vec<Value>) -> anyhow::Result<MonzoRow> {
     let date = DateTime::parse_from_rfc3339(row[headings::DATE].as_str().context("No date")?)
         .context("Failed to parse date")?;
 
@@ -73,54 +143,21 @@ pub fn from_json_row(row: Vec<serde_json::Value>) -> anyhow::Result<Insertion> {
 
     let timestamp = date.date_naive().and_time(time);
 
-    let title = row[headings::NAME]
-        .as_str()
-        .context("No title")?
-        .to_string();
-
-    let monzo_transaction_type = row[headings::TYPE]
-        .as_str()
-        .context("No transaction type")?
-        .to_string();
-
-    let description = json_opt(&row[headings::DESCRIPTION]);
-    let emoji = json_opt(&row[headings::EMOJI]);
-    let notes = json_opt(&row[headings::NOTES_AND_TAGS]);
-    let receipt = json_opt(&row[headings::RECEIPT]);
     let total_amount = Decimal::from_f64(row[headings::AMOUNT].as_f64().context("No amount")?)
         .context("Failed to parse date")?;
 
-    let expenditures: Vec<_> = match row.get(headings::CATEGORY_SPLIT) {
+    Ok(MonzoRow {
-        Some(Value::String(split)) if !split.is_empty() => split
+        transaction_id: json_required_str(&row[headings::TRANSACTION_ID], "Transaction ID")?,
-            .split(',')
+        title: json_required_str(&row[headings::NAME], "Title")?,
-            .map(|section| parse_section(&monzo_transaction_id, section))
+        transaction_type: json_required_str(&row[headings::TYPE], "Transaction type")?,
-            .collect::<Result<Vec<_>, anyhow::Error>>()?,
+        description: json_opt(&row[headings::DESCRIPTION]),
-
+        emoji: json_opt(&row[headings::EMOJI]),
-        _ => vec![entity::expenditure::Model {
+        notes: json_opt(&row[headings::NOTES_AND_TAGS]),
-            category: row[headings::CATEGORY]
+        receipt: json_opt(&row[headings::RECEIPT]),
-                .as_str()
+        primary_category: json_required_str(&row[headings::CATEGORY], "Primary Category")?,
-                .context("No context")?
+        category_split: json_opt(&row[headings::CATEGORY_SPLIT]),
-                .to_string(),
+        total_amount,
-            amount: total_amount,
+        timestamp,
-            transaction_id: monzo_transaction_id.clone(),
-        }
-        .into_active_model()],
-    };
-
-    Ok(Insertion {
-        transaction: transaction::ActiveModel {
-            id: Set(monzo_transaction_id),
-            transaction_type: Set(monzo_transaction_type),
-            timestamp: Set(timestamp),
-            title: Set(title),
-            emoji: Set(emoji),
-            notes: Set(notes),
-            receipt: Set(receipt),
-            total_amount: Set(total_amount),
-            description: Set(description),
-        },
-
-        contained_expenditures: expenditures,
     })
 }
 
@@ -131,9 +168,7 @@ fn csv_opt(s: &str) -> Option<String> {
     }
 }
 
-pub fn from_csv_row(row: StringRecord) -> anyhow::Result<Insertion> {
+pub fn from_csv_row(row: StringRecord) -> anyhow::Result<MonzoRow> {
-    let monzo_transaction_id = row[headings::TRANSACTION_ID].to_string();
-
     let date = NaiveDate::parse_from_str(&row[headings::DATE], "%d/%m/%Y")
         .context("Failed to parse date from csv")?;
 
@@ -142,41 +177,17 @@ pub fn from_csv_row(row: StringRecord) -> anyhow::Result<Insertion> {
 
     let timestamp = NaiveDateTime::new(date, time);
 
-    let title = row[headings::NAME].to_string();
+    Ok(MonzoRow {
-    let monzo_transaction_type = row[headings::TYPE].to_string();
+        timestamp,
-
+        transaction_id: row[headings::TRANSACTION_ID].to_string(),
-    let description = csv_opt(&row[headings::DESCRIPTION]);
+        title: row[headings::NAME].to_string(),
-    let emoji = csv_opt(&row[headings::EMOJI]);
+        transaction_type: row[headings::TYPE].to_string(),
-    let notes = csv_opt(&row[headings::NOTES_AND_TAGS]);
+        description: csv_opt(&row[headings::DESCRIPTION]),
-    let receipt = csv_opt(&row[headings::RECEIPT]);
+        emoji: csv_opt(&row[headings::EMOJI]),
-    let total_amount = row[headings::AMOUNT].parse::<Decimal>()?;
+        notes: csv_opt(&row[headings::NOTES_AND_TAGS]),
-
+        receipt: csv_opt(&row[headings::RECEIPT]),
-    let expenditures: Vec<_> = match row.get(headings::CATEGORY_SPLIT) {
+        total_amount: row[headings::AMOUNT].parse::<Decimal>()?,
-        Some(split) if !split.is_empty() => split
+        category_split: csv_opt(&row[headings::CATEGORY_SPLIT]),
-            .split(',')
+        primary_category: row[headings::CATEGORY].to_string(),
-            .map(|section| parse_section(&monzo_transaction_id, section))
-            .collect::<Result<Vec<_>, anyhow::Error>>()?,
-
-        _ => vec![entity::expenditure::Model {
-            transaction_id: monzo_transaction_id.clone(),
-            category: row[headings::CATEGORY].to_string(),
-            amount: total_amount,
-        }
-        .into_active_model()],
-    };
-
-    Ok(Insertion {
-        transaction: transaction::ActiveModel {
-            id: Set(monzo_transaction_id),
-            transaction_type: Set(monzo_transaction_type),
-            timestamp: Set(timestamp),
-            title: Set(title),
-            emoji: Set(emoji),
-            notes: Set(notes),
-            receipt: Set(receipt),
-            total_amount: Set(total_amount),
-            description: Set(description),
-        },
-        contained_expenditures: expenditures,
     })
 }