add route to get suggested swap

index.js

@@ -134,6 +134,46 @@ server.get('/scenario_package', bodyParser.json(), function(req, res) {
     };
 })
 
+server.get('/swap_fit', bodyParser.json(), function(req, res) {
+
+    var sql = "";
+    var w = "";
+    var c = 1;
+    var d = 1;
+    var args = [];
+    var path = './route_sql/swap_fit.sql';
+
+    fs.readFile(path, 'utf8', function(err, data) {
+        if (!err) {
+            callback(data);
+        } else {
+            console.log("fatal error pulling sql file")
+            callback(err);
+        }
+    });
+
+    var callback = function(arg) {
+        sql = arg;
+
+        //parse request body into a where clause
+        ({ c, w, d } = build_where(req, c, w, d, args));
+
+        //if there was no body sent, return with nothing
+        if (c == 1) {
+            res.send("no body was sent");
+            return;
+        }
+        console.log(new Date().toISOString() + "-------------------------get swap fit:------------------------------")
+        console.log(req.body);
+        //parse the where clause into the main sql statement
+        sql = sql.replace(new RegExp("where_clause", 'g'), w);
+        sql = sql.replace(new RegExp("replace_new_mold", 'g'), req.body.new_mold);
+        //execute the sql and send the result
+        console.log(sql);
+        Postgres.FirstRow(sql, [], res)
+    };
+})
+
 server.get('/list_changes', bodyParser.json(), function(req, res) {
 
     var sql = "";

route_sql/swap_fit.sql

@@ -0,0 +1,71 @@
+WITH 
+target AS (select replace_new_mold new_mold)
+,basemix AS (
+    SELECT
+        part,
+        stlc,
+        colc,
+        colgrp,
+        coltier,
+        sizc,
+        SUM(value_usd) value_usd
+    FROM
+        rlarp.osm_pool o
+        LEFT OUTER JOIN rlarp.itemmv i ON
+            i.item = o.part
+    WHERE
+        -----------------scenario----------------------------
+        where_clause
+        -----------------additional params-------------------
+        AND calc_status||flag <> 'CLOSEDREMAINDER' --exclude short ships when building order adjustments
+        AND order_date <= ship_date
+    GROUP BY
+        part,
+        stlc,
+        colc,
+        colgrp,
+        coltier,
+        sizc
+)
+--SELECT * FROM basemix
+,tag AS (
+    SELECT
+        b.part
+        ,b.value_usd
+        --,b.stlc
+        --,b.sizc
+        --,b.colgrp
+        --,b.coltier
+        --,b.colc
+        ,i.item
+        ,CASE WHEN b.sizc = i.sizc THEN '1' ELSE '0' END||
+        CASE WHEN i.aplnt = 'I' THEN '0' ELSE '1' END||
+        CASE WHEN b.colgrp = i.colgrp THEN '1' ELSE '0' END||
+        CASE WHEN b.coltier = i.coltier THEN '1' ELSE '0' END||
+        CASE WHEN b.colc = i.colc THEN '1' ELSE '0' END||
+        CASE WHEN substring(b.part,9,12) = substring(i.item,9,12) THEN '1' ELSE 0 END fit
+    FROM
+        basemix b
+        LEFT OUTER JOIN rlarp.itemmv i ON
+            i.stlc = (SELECT new_mold FROM target)
+)
+--SELECT * FROM tag 
+,rsort AS (
+SELECT
+    part,
+    value_usd,
+    item swap,
+    fit,
+    ROW_NUMBER() OVER (PARTITION BY tag.part ORDER BY fit DESC) ranked
+FROM 
+    tag
+ORDER BY 
+    part
+    ,fit desc
+)
+SELECT
+    json_agg(row_to_json(rsort)) x
+FROM
+    rsort
+WHERE
+    ranked = 1