118 lines
3.4 KiB
Rust
118 lines
3.4 KiB
Rust
use crate::ctx::Context;
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use crate::dbs::Options;
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use crate::dbs::Statement;
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use crate::doc::Document;
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use crate::err::Error;
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use crate::sql::idiom::Idiom;
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use crate::sql::output::Output;
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use crate::sql::paths::META;
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use crate::sql::permission::Permission;
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use crate::sql::value::Value;
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impl<'a> Document<'a> {
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pub async fn pluck(
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&self,
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ctx: &Context<'_>,
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opt: &Options,
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stm: &Statement<'_>,
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) -> Result<Value, Error> {
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// Ensure futures are run
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let opt = &opt.new_with_futures(true);
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// Process the desired output
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let mut out = match stm.output() {
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Some(v) => match v {
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Output::None => Err(Error::Ignore),
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Output::Null => Ok(Value::Null),
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Output::Diff => Ok(self.initial.diff(&self.current, Idiom::default()).into()),
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Output::After => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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self.current.compute(&ctx, opt).await
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}
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Output::Before => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.initial);
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self.initial.compute(&ctx, opt).await
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}
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Output::Fields(v) => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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v.compute(&ctx, opt, false).await
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}
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},
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None => match stm {
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Statement::Live(s) => match s.expr.len() {
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0 => Ok(self.initial.diff(&self.current, Idiom::default()).into()),
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_ => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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s.expr.compute(&ctx, opt, false).await
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}
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},
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Statement::Select(s) => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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s.expr.compute(&ctx, opt, s.group.is_some()).await
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}
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Statement::Create(_) => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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self.current.compute(&ctx, opt).await
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}
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Statement::Update(_) => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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self.current.compute(&ctx, opt).await
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}
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Statement::Relate(_) => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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self.current.compute(&ctx, opt).await
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}
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Statement::Insert(_) => {
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let mut ctx = Context::new(ctx);
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ctx.add_cursor_doc(&self.current);
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self.current.compute(&ctx, opt).await
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}
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_ => Err(Error::Ignore),
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},
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}?;
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// Check if this record exists
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if self.id.is_some() {
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// Should we run permissions checks?
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if opt.perms && opt.auth.perms() {
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// Clone transaction
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let txn = ctx.try_clone_transaction()?;
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// Loop through all field statements
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for fd in self.fd(opt, &txn).await?.iter() {
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// Loop over each field in document
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for k in out.each(&fd.name).iter() {
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// Process the field permissions
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match &fd.permissions.select {
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Permission::Full => (),
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Permission::None => out.del(ctx, opt, k).await?,
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Permission::Specific(e) => {
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// Disable permissions
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let opt = &opt.new_with_perms(false);
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// Get the current value
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let val = self.current.pick(k);
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// Configure the context
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let mut ctx = Context::new(ctx);
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ctx.add_value("value", &val);
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ctx.add_cursor_doc(&self.current);
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// Process the PERMISSION clause
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if !e.compute(&ctx, opt).await?.is_truthy() {
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out.del(&ctx, opt, k).await?
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}
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}
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}
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}
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}
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}
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}
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// Remove metadata fields on output
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out.del(ctx, opt, &*META).await?;
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// Output result
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Ok(out)
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}
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}
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