Spring Cleaning → removing obsolete stuff, and moved non-app things to ./etc (#810)

* Remove obsolete stuff, and moved non-app things to ./etc
* remove test
* Update package-lock

---------

Co-authored-by: Christian Georgi <christian.georgi@sap.com>

etc/data-viewer/app/viewer/app.js

@@ -0,0 +1,119 @@
+/* global Vue axios */ //> from vue.html
+const GET = (url) => axios.get('/odata/v4/-data'+url)
+const storageGet = (key, def) => localStorage.getItem('data-viewer:'+key) || def
+const storageSet = (key, val) => localStorage.setItem('data-viewer:'+key, val)
+const columnKeysFirst = (c1, c2) => {
+  if (c1.isKey  && !c2.isKey) return -1
+  if (!c1.isKey && c2.isKey) return 1
+  if (c1.isKey && c2.isKey) return c1.name.localeCompare(c2.name)
+  return 0 // retain natural order of normal columns
+}
+
+const vue = Vue.createApp ({
+
+  data() { return {
+    error: undefined,
+    dataSource: storageGet('data-source', 'db'),
+    skip: storageGet('skip', 0),
+    top: storageGet('top', 20),
+    entity: storageGet('entity') ? JSON.parse(storageGet('entity')) : undefined,
+    entities: [],
+    columns: [],
+    data: [],
+    rowDetails: {},
+    rowKey: storageGet('rowKey')
+  }},
+
+  watch: {
+    dataSource: (v) => { storageSet('data-source', v);  vue.fetchEntities() },
+    skip: (v) => { storageSet('skip', v); if (vue.entity)  vue.fetchData() },
+    top:  (v) => { storageSet('top',  v); if (vue.entity)  vue.fetchData() },
+  },
+
+  methods: {
+
+    async fetchEntities () {
+      let url = `/Entities`
+      if (vue.dataSource === 'db')  url += `?dataSource=db`
+      const {data} = await GET(url)
+      vue.entities = data.value
+      vue.entities.forEach(entity => entity.columns.sort(columnKeysFirst))
+      const entity = vue.entity && vue.entities.find(e => e.name === vue.entity.name)
+      if (entity) { // restore selection from previous fetch
+        vue.columns = entity.columns
+        await vue.fetchData(entity)
+      } else {
+        vue.entity = undefined
+        vue.columns = []
+        vue.data = []
+        vue.rowDetails = {}
+      }
+    },
+
+    async inspectEntity (eve) {
+      const entity = vue.entity = vue.entities [eve.currentTarget.rowIndex-1]
+      storageSet('entity', JSON.stringify(entity))
+      vue.columns = vue.entities.find(e => e.name === entity.name).columns
+      return await this.fetchData()
+    },
+
+    async fetchData () {
+      let url = `/Data?entity=${vue.entity.name}&$skip=${vue.skip}&$top=${vue.top}`
+      if (vue.dataSource === 'db')  url += `&dataSource=db`
+
+      try {
+        const {data} = await GET(url)
+        // sort data along column order
+        const columnIndexes = {}
+        vue.columns.forEach((col, i) => columnIndexes[col.name] = i)
+        vue.data = data.value.map(d => d.record
+          .sort((r1, r2) => columnIndexes[r1.column] - columnIndexes[r2.column])
+          .map(r => r.data)
+        )
+        const row = vue.data.find(data => vue._makeRowKey(data) === vue.rowKey)
+        if (row)  vue._setRowDetails(row)
+        else vue.rowDetails = {}
+        vue.error = undefined
+      } catch (err) {
+        vue.data = []
+        vue.rowDetails = {}
+        if (err.response?.data?.error) {
+          vue.error = err.response.data.error
+        } else {
+          vue.error = { code:err.code, message:err.message }
+        }
+      }
+
+    },
+
+    inspectRow (eve) {
+      vue.rowDetails = {}
+      const selectedRow = eve.currentTarget.rowIndex-1
+      vue.rowKey = vue._makeRowKey(vue.data[selectedRow])
+      storageSet('rowKey', vue.rowKey)
+      vue._setRowDetails(vue.data[selectedRow])
+    },
+
+    _setRowDetails(row) {
+      vue.rowDetails = {}
+      row.forEach((line, colIndex) => {
+        vue.rowDetails[vue.columns[colIndex].name] = line
+      })
+    },
+
+    _makeRowKey(row) {
+      // to identify a row, build a key string out of all key columns' values
+      return row
+        .filter((_, colIndex) => vue.columns[colIndex] && vue.columns[colIndex].isKey)
+        .reduce(((prev, next) => prev += next), '')
+    },
+
+    isActiveRow(row) {
+      return vue._makeRowKey(row) === vue.rowKey
+    }
+
+  }
+})
+.mount('#app')
+
+vue.fetchEntities()